From e90a09dd391e36e0cfd71f59ef76999a846a32c0 Mon Sep 17 00:00:00 2001
From: Yelninei <yelninei@tutamail.com>
Date: Sat, 21 Mar 2026 15:42:32 +0000
Subject: [PATCH 1/3] dmd: Port to GNU/Hurd.

---
 compiler/ini/hurd/bin32/dmd.conf              |  5 ++
 compiler/ini/hurd/bin64/dmd.conf              |  5 ++
 compiler/src/build.d                          |  4 +-
 compiler/src/dmd/backend/arm/cod1.d           |  2 +-
 compiler/src/dmd/backend/backconfig.d         | 46 +++++++++++++++++--
 compiler/src/dmd/backend/cdef.d               | 12 ++++-
 compiler/src/dmd/backend/elfobj.d             |  9 +++-
 compiler/src/dmd/backend/melf.d               |  3 +-
 compiler/src/dmd/backend/x86/cod1.d           | 21 +++++----
 compiler/src/dmd/backend/x86/cod3.d           |  6 +--
 compiler/src/dmd/cli.d                        | 12 +++--
 compiler/src/dmd/dmdparams.d                  |  2 +
 compiler/src/dmd/dmsc.d                       |  1 +
 compiler/src/dmd/frontend.h                   |  5 +-
 compiler/src/dmd/json.d                       |  2 +
 compiler/src/dmd/main.d                       |  2 +-
 compiler/src/dmd/mars.d                       |  7 +--
 compiler/src/dmd/target.d                     | 41 +++++++++++------
 compiler/src/dmd/target.h                     |  5 +-
 compiler/src/osmodel.mak                      |  7 ++-
 compiler/test/compilable/cdcmp.d              |  2 +-
 compiler/test/compilable/test21672.d          |  2 +-
 compiler/test/compilable/test22346.c          |  2 +-
 compiler/test/compilable/test23875.c          |  2 +-
 compiler/test/compilable/test24130.c          |  2 +-
 compiler/test/compilable/vcg-ast.d            |  2 +-
 .../test/fail_compilation/chkformat_clong.d   |  2 +-
 .../chkformat_clong_smalllong.d               |  2 +-
 compiler/test/fail_compilation/fail17105.d    |  2 +-
 compiler/test/fail_compilation/fail18372.d    |  2 +-
 .../test/fail_compilation/fail21227_win.d     |  2 +-
 compiler/test/fail_compilation/fail3753.d     |  2 +-
 compiler/test/fail_compilation/fail6451.d     |  2 +-
 compiler/test/fail_compilation/ice20042.d     |  2 +-
 compiler/test/fail_compilation/ice20264.d     |  2 +-
 compiler/test/fail_compilation/impconv.d      |  2 +-
 compiler/test/fail_compilation/invalid_lib.d  |  2 +-
 compiler/test/fail_compilation/vector_types.d |  2 +-
 compiler/test/fail_compilation/xmmslice.d     |  2 +-
 compiler/test/run.d                           |  2 +-
 compiler/test/runnable/bitfieldsms.c          |  2 +-
 compiler/test/runnable/bitfieldsposix32.c     |  2 +-
 compiler/test/runnable/bitfieldsposix64.c     |  2 +-
 compiler/test/runnable/dbitfieldsdm.d         |  2 +-
 compiler/test/runnable/dbitfieldsms.d         |  2 +-
 compiler/test/runnable/dbitfieldsposix32.d    |  2 +-
 compiler/test/runnable/dbitfieldsposix64.d    |  2 +-
 compiler/test/runnable/dhry.d                 | 15 ++++++
 compiler/test/runnable/ice21727.d             |  2 +-
 compiler/test/runnable/test22.d               | 30 ++++++++++++
 compiler/test/runnable/test23343.c            |  2 +-
 compiler/test/runnable/test_cdstrpar.d        |  2 +-
 compiler/test/runnable/testargtypes.d         |  2 +-
 compiler/test/runnable_cxx/cpp_abi_tests.d    |  2 +-
 compiler/test/runnable_cxx/cppa.d             |  2 +-
 compiler/test/runnable_cxx/nonpod_byval.d     |  2 +-
 compiler/test/tools/paths.d                   |  2 +
 57 files changed, 225 insertions(+), 87 deletions(-)
 create mode 100644 compiler/ini/hurd/bin32/dmd.conf
 create mode 100644 compiler/ini/hurd/bin64/dmd.conf

diff --git a/compiler/ini/hurd/bin32/dmd.conf b/compiler/ini/hurd/bin32/dmd.conf
new file mode 100644
index 000000000000..15f03e72fec3
--- /dev/null
+++ b/compiler/ini/hurd/bin32/dmd.conf
@@ -0,0 +1,5 @@
+[Environment32]
+DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib32 -L--export-dynamic -fPIC
+
+[Environment64]
+DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib64 -L--export-dynamic -fPIC
diff --git a/compiler/ini/hurd/bin64/dmd.conf b/compiler/ini/hurd/bin64/dmd.conf
new file mode 100644
index 000000000000..15f03e72fec3
--- /dev/null
+++ b/compiler/ini/hurd/bin64/dmd.conf
@@ -0,0 +1,5 @@
+[Environment32]
+DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib32 -L--export-dynamic -fPIC
+
+[Environment64]
+DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib64 -L--export-dynamic -fPIC
diff --git a/compiler/src/build.d b/compiler/src/build.d
index 2114282bdad9..3f1cab7c475c 100755
--- a/compiler/src/build.d
+++ b/compiler/src/build.d
@@ -1689,7 +1689,7 @@ bool download(string to, string from, uint tries = 3)
 /**
 Detects the host OS.
 
-Returns: a string from `{windows, osx,linux,freebsd,openbsd,netbsd,dragonflybsd,solaris}`
+Returns: a string from `{windows, osx,linux,freebsd,openbsd,netbsd,dragonflybsd,solaris,hurd}`
 */
 string detectOS()
 {
@@ -1709,6 +1709,8 @@ string detectOS()
         return "dragonflybsd";
     else version(Solaris)
         return "solaris";
+    else version(Hurd)
+        return "hurd";
     else
         static assert(0, "Unrecognized or unsupported OS.");
 }
diff --git a/compiler/src/dmd/backend/arm/cod1.d b/compiler/src/dmd/backend/arm/cod1.d
index 0439deadf811..c28b7f74c025 100644
--- a/compiler/src/dmd/backend/arm/cod1.d
+++ b/compiler/src/dmd/backend/arm/cod1.d
@@ -1751,7 +1751,7 @@ void cdfunc(ref CGstate cg, ref CodeBuilder cdb, elem* e, ref regm_t pretregs)
 
     /* Assume called function accesses TLS statics
      */
-    if (config.exe & (EX_LINUX | EX_LINUX64 | EX_OSX | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64) &&
+    if (config.exe & (EX_LINUX | EX_LINUX64 | EX_OSX | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_HURD | EX_HURD64) &&
         config.flags3 & CFG3pic)
         cg.accessedTLS = true;
 
diff --git a/compiler/src/dmd/backend/backconfig.d b/compiler/src/dmd/backend/backconfig.d
index 7ca45572251c..071bd972d07f 100644
--- a/compiler/src/dmd/backend/backconfig.d
+++ b/compiler/src/dmd/backend/backconfig.d
@@ -288,6 +288,42 @@ void out_config_init(
         cfg.objfmt = OBJ_ELF;
         cfg.ehmethod = useExceptions ? EHmethod.EH_DWARF : EHmethod.EH_NONE;
     }
+    else if (cfg.exe & (EX_HURD | EX_HURD64))
+    {
+        cfg.fpxmmregs = true;
+        cfg.avx = avx;
+        if (model == 64)
+        {
+            cfg.ehmethod = useExceptions ? EHmethod.EH_DWARF : EHmethod.EH_NONE;
+        }
+        else
+        {
+            cfg.ehmethod = useExceptions ? EHmethod.EH_DWARF : EHmethod.EH_NONE;
+            if (!exe)
+                cfg.flags |= CFGromable; // put switch tables in code segment
+        }
+        cfg.flags |= CFGnoebp;
+        switch (pic)
+        {
+            case 0:         // PIC.fixed
+                break;
+
+            case 1:         // PIC.pic
+                cfg.flags3 |= CFG3pic;
+                break;
+
+            case 2:         // PIC.pie
+                cfg.flags3 |= CFG3pic | CFG3pie;
+                break;
+
+            default:
+                assert(0);
+        }
+        if (symdebug)
+            cfg.flags |= CFGalwaysframe;
+
+        cfg.objfmt = OBJ_ELF;
+    }
 
     cfg.flags2 |= CFG2nodeflib;      // no default library
     cfg.flags3 |= CFG3eseqds;
@@ -320,7 +356,7 @@ static if (0)
     if (symdebug)
     {
         if (cfg.exe & (EX_LINUX | EX_LINUX64 | EX_OPENBSD | EX_OPENBSD64 | EX_FREEBSD | EX_FREEBSD64 | EX_DRAGONFLYBSD64 |
-                          EX_SOLARIS | EX_SOLARIS64 | EX_OSX | EX_OSX64))
+                          EX_SOLARIS | EX_SOLARIS64 | EX_OSX | EX_OSX64 | EX_HURD | EX_HURD64))
         {
             cfg.addlinenumbers = 1;
             cfg.fulltypes = (symdebug == 1) ? CVDWARF_D : CVDWARF_C;
@@ -446,7 +482,7 @@ void util_set32(exefmt_t exe)
     _tysize[TYnullptr] = LONGSIZE;
     _tysize[TYnptr] = LONGSIZE;
     _tysize[TYnref] = LONGSIZE;
-if (exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS | EX_SOLARIS64))
+if (exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS | EX_SOLARIS64 | EX_HURD | EX_HURD64))
 {
     _tysize[TYreal] = 12;
     _tysize[TYireal] = 12;
@@ -477,7 +513,7 @@ if (exe & EX_windos)
     _tyalignsize[TYnullptr] = LONGSIZE;
     _tyalignsize[TYnref] = LONGSIZE;
     _tyalignsize[TYnptr] = LONGSIZE;
-if (exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS | EX_SOLARIS64))
+if (exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS | EX_SOLARIS64 | EX_HURD | EX_HURD64))
 {
     _tyalignsize[TYreal] = 4;
     _tyalignsize[TYireal] = 4;
@@ -533,7 +569,7 @@ void util_set64(exefmt_t exe)
     _tysize[TYnptr] = 8;
     _tysize[TYnref] = 8;
     if (exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD |
-                      EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS | EX_SOLARIS64 | EX_OSX | EX_OSX64))
+                      EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS | EX_SOLARIS64 | EX_OSX | EX_OSX64 | EX_HURD | EX_HURD64))
     {
         _tysize[TYreal] = 16;
         _tysize[TYireal] = 16;
@@ -557,7 +593,7 @@ void util_set64(exefmt_t exe)
     _tyalignsize[TYnullptr] = 8;
     _tyalignsize[TYnptr] = 8;
     _tyalignsize[TYnref] = 8;
-    if (exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS | EX_SOLARIS64))
+    if (exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS | EX_SOLARIS64 | EX_HURD | EX_HURD64))
     {
         _tyalignsize[TYreal] = 16;
         _tyalignsize[TYireal] = 16;
diff --git a/compiler/src/dmd/backend/cdef.d b/compiler/src/dmd/backend/cdef.d
index 38b5672863df..0de72e24f6b4 100644
--- a/compiler/src/dmd/backend/cdef.d
+++ b/compiler/src/dmd/backend/cdef.d
@@ -44,6 +44,7 @@ enum TARGET_OPENBSD = xversion!`OpenBSD`;
 enum TARGET_SOLARIS = xversion!`Solaris`;
 enum TARGET_WINDOS  = xversion!`Windows`;
 enum TARGET_DRAGONFLYBSD  = xversion!`DragonFlyBSD`;
+enum TARGET_HURD    = xversion!`Hurd`;
 
 //
 //      Attributes
@@ -304,6 +305,8 @@ enum
     EX_OPENBSD      = 0x400000,
     EX_OPENBSD64    = 0x800000,
     EX_DRAGONFLYBSD64 = 0x1000000,
+    EX_HURD         = 0x2000000,
+    EX_HURD64       = 0x4000000,
 }
 
 // All of them
@@ -328,7 +331,9 @@ enum exefmt_t EX_all =
     EX_SOLARIS64 |
     EX_OPENBSD   |
     EX_OPENBSD64 |
-    EX_DRAGONFLYBSD64;
+    EX_DRAGONFLYBSD64 |
+    EX_HURD |
+    EX_HURD64;
 
 // All segmented memory models
 enum exefmt_t EX_segmented = EX_DOSX | EX_ZPM | EX_RATIONAL | EX_PHARLAP |
@@ -350,6 +355,7 @@ enum exefmt_t EX_posix = EX_LINUX   | EX_LINUX64   |
                          EX_FREEBSD | EX_FREEBSD64 |
                          EX_SOLARIS | EX_SOLARIS64 |
                          EX_OPENBSD | EX_OPENBSD64 |
+                         EX_HURD    | EX_HURD64    |
                          EX_DRAGONFLYBSD64;
 
 // All 16 bit targets
@@ -362,7 +368,8 @@ enum exefmt_t EX_32 = EX_DOSX | EX_OS2 | EX_PHARLAP |
                 EX_OSX     |
                 EX_FREEBSD |
                 EX_SOLARIS |
-                EX_OPENBSD;
+                EX_OPENBSD |
+                EX_HURD;
 
 // All 64 bit targets
 enum exefmt_t EX_64 =
@@ -372,6 +379,7 @@ enum exefmt_t EX_64 =
                 EX_FREEBSD64 |
                 EX_SOLARIS64 |
                 EX_OPENBSD64 |
+                EX_HURD64    |
                 EX_DRAGONFLYBSD64;
 
 // Constraints
diff --git a/compiler/src/dmd/backend/elfobj.d b/compiler/src/dmd/backend/elfobj.d
index 8a64168b0cd3..990b5831a343 100644
--- a/compiler/src/dmd/backend/elfobj.d
+++ b/compiler/src/dmd/backend/elfobj.d
@@ -68,7 +68,7 @@ else
     enum DMDV2 = false;
 bool REQUIRE_DSO_REGISTRY()
 {
-    return DMDV2 && (config.exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_DRAGONFLYBSD64));
+    return DMDV2 && (config.exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_DRAGONFLYBSD64 | EX_HURD | EX_HURD64));
 }
 
 /**
@@ -81,7 +81,7 @@ bool USE_INIT_ARRAY() { return true; }
  * FreeBSD defaults to lld as of FreeBSD 13 (2021); OpenBSD as of 6.5 (2019).
  */
 
-bool ELF_COMDAT() { return (config.exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64)) != 0; }
+bool ELF_COMDAT() { return (config.exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_HURD | EX_HURD64)) != 0; }
 
 /***************************************************
  * Correspondence of relocation types
@@ -1239,6 +1239,11 @@ void ElfObj_term(const(char)[] objfilename)
             ELFOSABI = ELFOSABI_OPENBSD;
             break;
 
+        case EX_HURD:
+        case EX_HURD64:
+            ELFOSABI = ELFOSABI_GNU;
+            break;
+
         case EX_SOLARIS:
         case EX_SOLARIS64:
         case EX_DRAGONFLYBSD64:
diff --git a/compiler/src/dmd/backend/melf.d b/compiler/src/dmd/backend/melf.d
index 3efa3ec2ee0b..947f7f228697 100644
--- a/compiler/src/dmd/backend/melf.d
+++ b/compiler/src/dmd/backend/melf.d
@@ -54,7 +54,8 @@ nothrow:
             enum ELFOSABI_SYSV       = 0;       /* UNIX System V ABI */
             enum ELFOSABI_HPUX       = 1;       /* HP-UX */
             enum ELFOSABI_NETBSD     = 2;
-            enum ELFOSABI_LINUX      = 3;
+            enum ELFOSABI_GNU        = 3;
+            enum ELFOSABI_LINUX      = ELFOSABI_GNU;
             enum ELFOSABI_FREEBSD    = 9;
             enum ELFOSABI_OPENBSD    = 12;
             enum ELFOSABI_ARM        = 97;      /* ARM */
diff --git a/compiler/src/dmd/backend/x86/cod1.d b/compiler/src/dmd/backend/x86/cod1.d
index 93db8d415063..54fc21aadbb9 100644
--- a/compiler/src/dmd/backend/x86/cod1.d
+++ b/compiler/src/dmd/backend/x86/cod1.d
@@ -2155,7 +2155,8 @@ void getClibFunction(uint clib, ref Symbol* s, ref ClibInfo* cinfo, objfmt_t obj
                           EX_FREEBSD | EX_FREEBSD64 |
                           EX_OPENBSD | EX_OPENBSD64 |
                           EX_DRAGONFLYBSD64 |
-                          EX_SOLARIS | EX_SOLARIS64);
+                          EX_SOLARIS | EX_SOLARIS64 |
+                          EX_HURD    | EX_HURD64);
 
     switch (clib)
     {
@@ -2177,7 +2178,7 @@ void getClibFunction(uint clib, ref Symbol* s, ref ClibInfo* cinfo, objfmt_t obj
 
         case CLIB.ldiv:
             cinfo.retregs16 = mDX|mAX;
-            if (exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD))
+            if (exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_HURD))
             {
                 s = symboly("__divdi3", mAX|mBX|mCX|mDX);
                 cinfo.flags = INFpushebx;
@@ -2205,7 +2206,7 @@ void getClibFunction(uint clib, ref Symbol* s, ref ClibInfo* cinfo, objfmt_t obj
 
         case CLIB.lmod:
             cinfo.retregs16 = mCX|mBX;
-            if (exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD))
+            if (exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_HURD))
             {
                 s = symboly("__moddi3", mAX|mBX|mCX|mDX);
                 cinfo.flags = INFpushebx;
@@ -2233,7 +2234,7 @@ void getClibFunction(uint clib, ref Symbol* s, ref ClibInfo* cinfo, objfmt_t obj
 
         case CLIB.uldiv:
             cinfo.retregs16 = mDX|mAX;
-            if (exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD))
+            if (exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_HURD))
             {
                 s = symboly("__udivdi3", mAX|mBX|mCX|mDX);
                 cinfo.flags = INFpushebx;
@@ -2261,7 +2262,7 @@ void getClibFunction(uint clib, ref Symbol* s, ref ClibInfo* cinfo, objfmt_t obj
 
         case CLIB.ulmod:
             cinfo.retregs16 = mCX|mBX;
-            if (exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD))
+            if (exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_HURD))
             {
                 s = symboly("__umoddi3", mAX|mBX|mCX|mDX);
                 cinfo.flags = INFpushebx;
@@ -2902,7 +2903,7 @@ void callclib(ref CGstate cg, ref CodeBuilder cdb, elem* e, uint clib, ref regm_
         }
         if (pushebx)
         {
-            if (config.exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_DRAGONFLYBSD64))
+            if (config.exe & (EX_LINUX | EX_LINUX64 | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_HURD | EX_HURD64))
             {
                 cdb.gen1(0x50 + CX);                             // PUSH ECX
                 cdb.gen1(0x50 + BX);                             // PUSH EBX
@@ -2923,7 +2924,7 @@ void callclib(ref CGstate cg, ref CodeBuilder cdb, elem* e, uint clib, ref regm_
             cdb.gen1(0x50 + DX);                                 // PUSH EDX
             cdb.gen1(0x50 + AX);                                 // PUSH EAX
         }
-        if (config.exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_SOLARIS))
+        if (config.exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_SOLARIS | EX_HURD))
         {
             // Note: not for OSX
             /* Pass EBX on the stack instead, this is because EBX is used
@@ -3412,7 +3413,7 @@ void cdfunc(ref CGstate cg, ref CodeBuilder cdb, elem* e, ref regm_t pretregs)
 
     /* Assume called function access statics
      */
-    if (config.exe & (EX_LINUX | EX_LINUX64 | EX_OSX | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64) &&
+    if (config.exe & (EX_LINUX | EX_LINUX64 | EX_OSX | EX_FREEBSD | EX_FREEBSD64 | EX_OPENBSD | EX_OPENBSD64 | EX_HURD | EX_HURD64) &&
         config.flags3 & CFG3pic)
         cg.accessedTLS = true;
 
@@ -3459,7 +3460,7 @@ void cdfunc(ref CGstate cg, ref CodeBuilder cdb, elem* e, ref regm_t pretregs)
         parameters[i].numalign = 0;
         if (alignsize > stackalign &&
             (I64 || (alignsize >= 16 &&
-                (config.exe & (EX_OSX | EX_LINUX) && (tyaggregate(ep.Ety) || tyvector(ep.Ety))))))
+                     (config.exe & (EX_OSX | EX_LINUX | EX_HURD) && (tyaggregate(ep.Ety) || tyvector(ep.Ety))))))
         {
             if (alignsize > STACKALIGN)
             {
@@ -4027,7 +4028,7 @@ private void funccall(ref CGstate cg, ref CodeBuilder cdb, elem* e, uint numpara
         tym_t e11ty = tybasic(e11.Ety);
         assert(!I16 || (e11ty == (farfunc ? TYfptr : TYnptr)));
         load_localgot(cg,cdb);
-        if (config.exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_SOLARIS)) // 32 bit only
+        if (config.exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_SOLARIS | EX_HURD)) // 32 bit only
         {
             if (config.flags3 & CFG3pic)
                 keepmsk |= mBX;
diff --git a/compiler/src/dmd/backend/x86/cod3.d b/compiler/src/dmd/backend/x86/cod3.d
index f262ee475bff..331eb2a8cb0c 100644
--- a/compiler/src/dmd/backend/x86/cod3.d
+++ b/compiler/src/dmd/backend/x86/cod3.d
@@ -2460,7 +2460,7 @@ void outjmptab(block* b)
                 break;
             }
         }
-        if (config.exe & (EX_LINUX64 | EX_FREEBSD64 | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS64))
+        if (config.exe & (EX_LINUX64 | EX_FREEBSD64 | EX_OPENBSD64 | EX_DRAGONFLYBSD64 | EX_SOLARIS64 | EX_HURD64))
         {
             if (config.flags3 & CFG3pic)
             {
@@ -2473,7 +2473,7 @@ void outjmptab(block* b)
                 *poffset += 8;
             }
         }
-        else if (config.exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_SOLARIS))
+        else if (config.exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_SOLARIS | EX_HURD))
         {
             if (config.flags3 & CFG3pic)
             {
@@ -3126,7 +3126,7 @@ void cdgot(ref CGstate cg, ref CodeBuilder cdb, elem* e, ref regm_t pretregs)
 @trusted
 void load_localgot(ref CGstate cg, ref CodeBuilder cdb)
 {
-    if (config.exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_SOLARIS)) // note: I32 only
+    if (config.exe & (EX_LINUX | EX_FREEBSD | EX_OPENBSD | EX_SOLARIS | EX_HURD)) // note: I32 only
     {
         if (config.flags3 & CFG3pic)
         {
diff --git a/compiler/src/dmd/cli.d b/compiler/src/dmd/cli.d
index 5cd376e27f6c..31c912333f1a 100644
--- a/compiler/src/dmd/cli.d
+++ b/compiler/src/dmd/cli.d
@@ -33,10 +33,11 @@ enum TargetOS : ubyte
     FreeBSD      = 0x10,
     Solaris      = 0x20,
     DragonFlyBSD = 0x40,
+    Hurd         = 0x80,
 
     // Combination masks
-    all = linux | Windows | OSX | OpenBSD | FreeBSD | Solaris | DragonFlyBSD,
-    Posix = linux | OSX | OpenBSD | FreeBSD | Solaris | DragonFlyBSD,
+    all = linux | Windows | OSX | OpenBSD | FreeBSD | Solaris | DragonFlyBSD | Hurd,
+    Posix = linux | OSX | OpenBSD | FreeBSD | Solaris | DragonFlyBSD | Hurd,
 }
 
 // Detect the current TargetOS
@@ -68,6 +69,10 @@ else version(Solaris)
 {
     private enum targetOS = TargetOS.Solaris;
 }
+else version(Hurd)
+{
+    private enum targetOS = TargetOS.Hurd;
+}
 else
 {
     private enum targetOS = TargetOS.all;
@@ -791,6 +796,7 @@ dmd -cov -unittest myprog.d
                     $(LI $(I openbsd): OpenBSD)
                     $(LI $(I osx): OSX)
                     $(LI $(I solaris): Solaris)
+                    $(LI $(I hurd): Hurd)
                     $(LI $(I windows): Windows)
                 )`
         ),
@@ -881,7 +887,7 @@ dmd -cov -unittest myprog.d
                        $(LI `freestanding` for no operating system)
                        $(LI `darwin` or `osx` for MacOS)
                        $(LI `dragonfly` or `dragonflybsd` for DragonflyBSD)
-                       $(LI `freebsd`, `openbsd`, `linux`, `solaris` or `windows` for their respective operating systems)
+                       $(LI `freebsd`, `openbsd`, `linux`, `solaris`, `hurd` or `windows` for their respective operating systems)
                    )
                    $(LI $(I cenv) is the C runtime environment and is optional:)
                    $(UL
diff --git a/compiler/src/dmd/dmdparams.d b/compiler/src/dmd/dmdparams.d
index 12a0a31cc171..9b112a70d0c6 100644
--- a/compiler/src/dmd/dmdparams.d
+++ b/compiler/src/dmd/dmdparams.d
@@ -227,6 +227,8 @@ struct Triple
             os =  Target.OS.OpenBSD;
         else if (matches("linux"))
             os =  Target.OS.linux;
+        else if (matches("hurd"))
+            os =  Target.OS.Hurd;
         else if (matches("windows"))
             os =  Target.OS.Windows;
         else
diff --git a/compiler/src/dmd/dmsc.d b/compiler/src/dmd/dmsc.d
index 5ffa48651927..b0b1c33bea45 100644
--- a/compiler/src/dmd/dmsc.d
+++ b/compiler/src/dmd/dmsc.d
@@ -55,6 +55,7 @@ void backend_init(const ref Param params, const ref DMDparams driverParams, cons
         case Target.OS.OpenBSD: exfmt = is64 ? EX_OPENBSD64 : EX_OPENBSD; break;
         case Target.OS.Solaris: exfmt = is64 ? EX_SOLARIS64 : EX_SOLARIS; break;
         case Target.OS.DragonFlyBSD: assert(is64); exfmt = EX_DRAGONFLYBSD64; break;
+        case Target.OS.Hurd:    exfmt = is64 ? EX_HURD64    : EX_HURD; break;
         default: assert(0);
     }
 
diff --git a/compiler/src/dmd/frontend.h b/compiler/src/dmd/frontend.h
index 3c3a7319f8d2..59a66499491c 100644
--- a/compiler/src/dmd/frontend.h
+++ b/compiler/src/dmd/frontend.h
@@ -7325,8 +7325,9 @@ struct Target final
         FreeBSD = 16u,
         Solaris = 32u,
         DragonFlyBSD = 64u,
-        all = 127u,
-        Posix = 125u,
+        Hurd = 128u,
+        all = 255u,
+        Posix = 253u,
     };
 
     OS os;
diff --git a/compiler/src/dmd/json.d b/compiler/src/dmd/json.d
index 2c85dd9d2fbd..aa90abae0e86 100644
--- a/compiler/src/dmd/json.d
+++ b/compiler/src/dmd/json.d
@@ -879,6 +879,8 @@ public:
                 item("solaris");
                 item("bsd");
             }
+            else if (target.os == Target.OS.Hurd)
+                item("hurd");
         }
         arrayEnd();
 
diff --git a/compiler/src/dmd/main.d b/compiler/src/dmd/main.d
index 5b37bd3cd68b..db55c57a3617 100644
--- a/compiler/src/dmd/main.d
+++ b/compiler/src/dmd/main.d
@@ -1053,7 +1053,7 @@ void reconcileCommands(ref Param params, ref Target target)
             error(Loc.initial, "`-m32` is not supported on DragonFlyBSD, it is 64-bit only");
     }
 
-    if (target.os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD))
+    if (target.os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD | Target.OS.Hurd))
     {
         if (driverParams.lib && driverParams.dll)
             error(Loc.initial, "cannot mix `-lib` and `-shared`");
diff --git a/compiler/src/dmd/mars.d b/compiler/src/dmd/mars.d
index 9841382ad37d..253806cc8e6f 100644
--- a/compiler/src/dmd/mars.d
+++ b/compiler/src/dmd/mars.d
@@ -385,7 +385,7 @@ void setDefaultLibraries(const ref Target target, ref const(char)[] defaultlibna
         {
             defaultlibname = target.isX86_64 ? "phobos64" : "phobos32mscoff";
         }
-        else if (target.os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD))
+        else if (target.os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD | Target.OS.Hurd))
         {
             defaultlibname = "libphobos2.a";
         }
@@ -1179,7 +1179,7 @@ bool parseCommandLine(const ref Strings arguments, const size_t argc, out Param
             enum len = "-os=".length;
             // Parse:
             //      -os=identifier
-            immutable string msg = "Only `host`, `linux`, `windows`, `osx`,`openbsd`, `freebsd`, `solaris`, `dragonflybsd` allowed for `-os`";
+            immutable string msg = "Only `host`, `linux`, `windows`, `osx`,`openbsd`, `freebsd`, `solaris`, `dragonflybsd`, `hurd` allowed for `-os`";
             if (Identifier.isValidIdentifier(p + len))
             {
                 const ident = p + len;
@@ -1193,6 +1193,7 @@ bool parseCommandLine(const ref Strings arguments, const size_t argc, out Param
                 case "freebsd":      target.os = Target.OS.FreeBSD;      break;
                 case "solaris":      target.os = Target.OS.Solaris;      break;
                 case "dragonflybsd": target.os = Target.OS.DragonFlyBSD; break;
+                case "hurd":         target.os = Target.OS.Hurd;         break;
                 default:
                     errorInvalidSwitch(p, msg);
                     return false;
@@ -1927,7 +1928,7 @@ bool createModule(const(char)* file, ref Strings libmodules, ref Param params, c
         libmodules.push(file);
         return false;
     }
-    if (target.os & (Target.OS.linux | Target.OS.OSX| Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD))
+    if (target.os & (Target.OS.linux | Target.OS.OSX| Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD | Target.OS.Hurd))
     {
         if (FileName.equals(ext, target.dll_ext))
         {
diff --git a/compiler/src/dmd/target.d b/compiler/src/dmd/target.d
index a6b497d72b03..a4722732e981 100644
--- a/compiler/src/dmd/target.d
+++ b/compiler/src/dmd/target.d
@@ -65,6 +65,8 @@ Target.OS defaultTargetOS() @safe
         return Target.OS.Solaris;
     else version (DragonFlyBSD)
         return Target.OS.DragonFlyBSD;
+    else version (Hurd)
+        return Target.OS.Hurd;
     else
         static assert(0, "unknown TARGET");
 }
@@ -184,7 +186,7 @@ void addPredefinedGlobalIdentifiers(const ref Target tgt)
     {
         if (tgt.os & OS.Posix)
             predef("Posix");
-        if (tgt.os & (OS.linux | OS.FreeBSD | OS.OpenBSD | OS.DragonFlyBSD | OS.Solaris))
+        if (tgt.os & (OS.linux | OS.FreeBSD | OS.OpenBSD | OS.DragonFlyBSD | OS.Solaris | OS.Hurd))
             predef("ELFv1");
         switch (tgt.os)
         {
@@ -193,6 +195,7 @@ void addPredefinedGlobalIdentifiers(const ref Target tgt)
             case OS.OpenBSD:      { predef("OpenBSD");      break; }
             case OS.DragonFlyBSD: { predef("DragonFlyBSD"); break; }
             case OS.Solaris:      { predef("Solaris");      break; }
+            case OS.Hurd:         { predef("Hurd");         break; }
             case OS.Windows:
             {
                  predef("Windows");
@@ -335,10 +338,11 @@ extern (C++) struct Target
         FreeBSD      = 0x10,
         Solaris      = 0x20,
         DragonFlyBSD = 0x40,
+        Hurd         = 0x80,
 
         // Combination masks
-        all = linux | Windows | OSX | OpenBSD | FreeBSD | Solaris | DragonFlyBSD,
-        Posix = linux | OSX | OpenBSD | FreeBSD | Solaris | DragonFlyBSD,
+        all = linux | Windows | OSX | OpenBSD | FreeBSD | Solaris | DragonFlyBSD | Hurd,
+        Posix = linux | OSX | OpenBSD | FreeBSD | Solaris | DragonFlyBSD | Hurd,
     }
 
     extern(D) enum ObjectFormat : ubyte
@@ -462,7 +466,7 @@ extern (C++) struct Target
             classinfosize = 0x98+16; // 168
         }
 
-        if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris))
+        if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris | Target.OS.Hurd))
         {
             realsize = 12;
             realpad = 2;
@@ -485,7 +489,7 @@ extern (C++) struct Target
 
         if (isX86_64 || isAArch64)
         {
-            if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris))
+            if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris | Target.OS.Hurd))
             {
                 realsize = 16;
                 realpad = 6;
@@ -520,7 +524,7 @@ extern (C++) struct Target
             dll_ext = "dll";
             run_noext = false;
         }
-        else if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris | Target.OS.OSX))
+        else if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris | Target.OS.OSX | Target.OS.Hurd))
         {
             obj_ext = "o";
             lib_ext = "a";
@@ -1120,7 +1124,8 @@ extern (C++) struct Target
             if (tns.ty != TY.Tstruct)
             {
     L2:
-                if (os == Target.OS.linux && tf.linkage != LINK.d && isX86)
+                if ((os & (Target.OS.linux | Target.OS.Hurd)) &&
+                    tf.linkage != LINK.d && isX86)
                 {
                                                     // 32 bit C/C++ structs always on stack
                 }
@@ -1147,7 +1152,8 @@ extern (C++) struct Target
         if (auto ts = tns.isTypeStruct())
         {
             auto sd = ts.sym;
-            if (os == Target.OS.linux && tf.linkage != LINK.d && isX86)
+            if ((os & (Target.OS.linux | Target.OS.Hurd)) &&
+                tf.linkage != LINK.d && isX86)
             {
                 //printf("  2 true\n");
                 return true;            // 32 bit C/C++ structs always on stack
@@ -1464,7 +1470,7 @@ struct TargetC
         shortsize = 2;
         intsize = 4;
         long_longsize = 8;
-        if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris))
+        if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris | Target.OS.Hurd))
             longsize = 4;
         else if (os == Target.OS.OSX)
             longsize = 4;
@@ -1474,7 +1480,7 @@ struct TargetC
             assert(0);
         if (target.isX86_64 || target.isAArch64)
         {
-            if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris))
+            if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris | Target.OS.Hurd))
                 longsize = 8;
             else if (os == Target.OS.OSX)
                 longsize = 8;
@@ -1499,11 +1505,16 @@ struct TargetC
             else
                 runtime = Runtime.Glibc;
         }
+        else if (os == Target.OS.Hurd)
+        {
+            runtime = Runtime.Glibc;
+        }
 
         if (os == Target.OS.Windows)
             bitFieldStyle = BitFieldStyle.MS;
         else if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OSX |
-                       Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris))
+                       Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris |
+                       Target.OS.Hurd))
             bitFieldStyle = BitFieldStyle.Gcc_Clang;
         else
             assert(0);
@@ -1564,7 +1575,7 @@ struct TargetCPP
     extern (D) void initialize(ref const Param params, ref const Target target) @safe
     {
         const os = target.os;
-        if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris))
+        if (os & (Target.OS.linux | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.DragonFlyBSD | Target.OS.Solaris | Target.OS.Hurd))
             twoDtorInVtable = true;
         else if (os == Target.OS.OSX)
             twoDtorInVtable = true;
@@ -1578,7 +1589,7 @@ struct TargetCPP
         exceptions = (os & Target.OS.Posix) != 0;
         if (os == Target.OS.Windows)
             runtime = Runtime.Microsoft;
-        else if (os & (Target.OS.linux | Target.OS.DragonFlyBSD))
+        else if (os & (Target.OS.linux | Target.OS.DragonFlyBSD | Target.OS.Hurd))
             runtime = Runtime.GNU;
         else if (os & (Target.OS.OSX | Target.OS.FreeBSD | Target.OS.OpenBSD))
             runtime = Runtime.LLVM;
@@ -1602,7 +1613,7 @@ struct TargetCPP
         import dmd.mangle.cpp : toCppMangleItanium;
         import dmd.mangle.cppwin : toCppMangleMSVC;
 
-        if (target.os & (Target.OS.linux | Target.OS.OSX | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD))
+        if (target.os & (Target.OS.linux | Target.OS.OSX | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD | Target.OS.Hurd))
             return toCppMangleItanium(s);
         if (target.os == Target.OS.Windows)
             return toCppMangleMSVC(s);
@@ -1622,7 +1633,7 @@ struct TargetCPP
         import dmd.mangle.cpp : cppTypeInfoMangleItanium;
         import dmd.mangle.cppwin : cppTypeInfoMangleMSVC;
 
-        if (target.os & (Target.OS.linux | Target.OS.OSX | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD))
+        if (target.os & (Target.OS.linux | Target.OS.OSX | Target.OS.FreeBSD | Target.OS.OpenBSD | Target.OS.Solaris | Target.OS.DragonFlyBSD | Target.OS.Hurd))
             return cppTypeInfoMangleItanium(cd);
         if (target.os == Target.OS.Windows)
             return cppTypeInfoMangleMSVC(cd);
diff --git a/compiler/src/dmd/target.h b/compiler/src/dmd/target.h
index f7a267ab08ae..b6fbb4efc0f5 100644
--- a/compiler/src/dmd/target.h
+++ b/compiler/src/dmd/target.h
@@ -129,10 +129,11 @@ struct Target
         OS_FreeBSD      = 0x10,
         OS_Solaris      = 0x20,
         OS_DragonFlyBSD = 0x40,
+        OS_Hurd         = 0x80,
 
         // Combination masks
-        all = OS_linux | OS_Windows | OS_OSX | OS_OpenBSD | OS_FreeBSD | OS_Solaris | OS_DragonFlyBSD,
-        Posix = OS_linux | OS_OSX | OS_OpenBSD | OS_FreeBSD | OS_Solaris | OS_DragonFlyBSD,
+        all = OS_linux | OS_Windows | OS_OSX | OS_OpenBSD | OS_FreeBSD | OS_Solaris | OS_DragonFlyBSD | OS_Hurd,
+        Posix = OS_linux | OS_OSX | OS_OpenBSD | OS_FreeBSD | OS_Solaris | OS_DragonFlyBSD | OS_Hurd,
     };
 
     OS os;
diff --git a/compiler/src/osmodel.mak b/compiler/src/osmodel.mak
index 69676c18b007..443509c61e66 100644
--- a/compiler/src/osmodel.mak
+++ b/compiler/src/osmodel.mak
@@ -2,7 +2,7 @@
 #
 # Detects and sets the macros:
 #
-#   OS         = one of {windows,osx,linux,freebsd,openbsd,netbsd,dragonflybsd,solaris}
+#   OS         = one of {windows,osx,linux,freebsd,openbsd,netbsd,dragonflybsd,solaris,hurd}
 #   MODEL      = one of { 32, 64 }
 #   MODEL_FLAG = one of { -m32, -m64 }
 #   ARCH       = one of { x86, x86_64, aarch64 }
@@ -40,6 +40,9 @@ ifeq (,$(OS))
     ifeq (SunOS,$(uname_S))
       OS:=solaris
     endif
+    ifeq (GNU,$(uname_S))
+      OS:=hurd
+    endif
     ifeq (,$(OS))
       $(error Unrecognized or unsupported OS for uname: $(uname_S))
     endif
@@ -87,7 +90,7 @@ ifeq (,$(MODEL))
       MODEL:=64
       ARCH:=aarch64
     endif
-    ifneq (,$(findstring $(uname_M),i386 i586 i686))
+    ifneq (,$(findstring $(uname_M),i386 i586 i686 i686-AT386))
       MODEL:=32
       ARCH:=x86
     endif
diff --git a/compiler/test/compilable/cdcmp.d b/compiler/test/compilable/cdcmp.d
index 16abde0bd5b0..f8f9106e5f6a 100644
--- a/compiler/test/compilable/cdcmp.d
+++ b/compiler/test/compilable/cdcmp.d
@@ -2,7 +2,7 @@
 // REQUIRED_ARGS: -O
 // POST_SCRIPT: compilable/extra-files/objdump-postscript.sh
 // only testing on SYSV-ABI, but backend code is identical across platforms
-// DISABLED: win32 win64 osx linux32 freebsd32 freebsd64 openbsd32 openbsd64
+// DISABLED: win32 win64 osx linux32 freebsd32 freebsd64 openbsd32 openbsd64 hurd32
 
 bool test_ltz(ubyte x) { return x <  0; }
 bool test_lez(ubyte x) { return x <= 0; }
diff --git a/compiler/test/compilable/test21672.d b/compiler/test/compilable/test21672.d
index abad340fcc00..81ab7622b740 100644
--- a/compiler/test/compilable/test21672.d
+++ b/compiler/test/compilable/test21672.d
@@ -1,5 +1,5 @@
 // REQUIRED_ARGS: -mcpu=avx2 -O
-// DISABLED: win32 linux32 freebsd32 openbsd32
+// DISABLED: win32 linux32 freebsd32 openbsd32 hurd32
 
 // https://issues.dlang.org/show_bug.cgi?id=21672
 
diff --git a/compiler/test/compilable/test22346.c b/compiler/test/compilable/test22346.c
index 9d1444ad7403..8c4d85b6cfeb 100644
--- a/compiler/test/compilable/test22346.c
+++ b/compiler/test/compilable/test22346.c
@@ -1,4 +1,4 @@
-/* DISABLED: win32 win64 linux32 osx32 osx64 freebsd32 openbsd32
+/* DISABLED: win32 win64 linux32 osx32 osx64 freebsd32 openbsd32 hurd32
  */
 
 // https://issues.dlang.org/show_bug.cgi?id=23346
diff --git a/compiler/test/compilable/test23875.c b/compiler/test/compilable/test23875.c
index c5ee060cc656..b074f1268054 100644
--- a/compiler/test/compilable/test23875.c
+++ b/compiler/test/compilable/test23875.c
@@ -1,4 +1,4 @@
-/* DISABLED: win32 linux32
+/* DISABLED: win32 linux32 hurd32
  */
 
 // https://issues.dlang.org/show_bug.cgi?id=23875
diff --git a/compiler/test/compilable/test24130.c b/compiler/test/compilable/test24130.c
index 5f7f69f6ccdf..5160968b55ba 100644
--- a/compiler/test/compilable/test24130.c
+++ b/compiler/test/compilable/test24130.c
@@ -1,5 +1,5 @@
 /*
- * DISABLED: freebsd32 freebsd64 linux32 linux64 osx32 osx64 win64 dragonflybsd openbsd
+ * DISABLED: freebsd32 freebsd64 linux32 linux64 osx32 osx64 win64 dragonflybsd openbsd hurd
  */
 
 // https://issues.dlang.org/show_bug.cgi?id=24130
diff --git a/compiler/test/compilable/vcg-ast.d b/compiler/test/compilable/vcg-ast.d
index 6a9055574008..3e0647f50b72 100644
--- a/compiler/test/compilable/vcg-ast.d
+++ b/compiler/test/compilable/vcg-ast.d
@@ -5,7 +5,7 @@ OUTPUT_FILES: compilable/vcg-ast.d.cg
 EXTRA_FILES: imports/vcg_ast_import.d
 TEST_OUTPUT_FILE: extra-files/vcg-ast.d.cg
 // size_t currently must be ulong in this test, not uint
-DISABLED: freebsd32 openbsd32 linux32 osx32 win32
+DISABLED: freebsd32 openbsd32 linux32 osx32 win32 hurd32
 */
 
 module vcg;
diff --git a/compiler/test/fail_compilation/chkformat_clong.d b/compiler/test/fail_compilation/chkformat_clong.d
index 58c2c1af4f5e..0f87ee18bc5f 100644
--- a/compiler/test/fail_compilation/chkformat_clong.d
+++ b/compiler/test/fail_compilation/chkformat_clong.d
@@ -1,7 +1,7 @@
 // Test printf format checking for C long size-dependent cases (64-bit: long = 8 bytes)
 /*
 REQUIRED_ARGS: -de
-DISABLED: win32 win64 freebsd32 openbsd32 linux32 osx32
+DISABLED: win32 win64 freebsd32 openbsd32 linux32 osx32 hurd32
 TEST_OUTPUT:
 ---
 fail_compilation/chkformat_clong.d(21): Deprecation: argument `p` of type `char*` does not match format specification
diff --git a/compiler/test/fail_compilation/chkformat_clong_smalllong.d b/compiler/test/fail_compilation/chkformat_clong_smalllong.d
index c7830c99d722..ffbd6604bc1d 100644
--- a/compiler/test/fail_compilation/chkformat_clong_smalllong.d
+++ b/compiler/test/fail_compilation/chkformat_clong_smalllong.d
@@ -1,7 +1,7 @@
 // Test printf format checking for C long size-dependent cases (32-bit / Windows: long = 4 bytes)
 /*
 REQUIRED_ARGS: -de
-DISABLED: linux64 freebsd64 openbsd64 osx64
+DISABLED: linux64 freebsd64 openbsd64 osx64 hurd64
 TEST_OUTPUT:
 ---
 fail_compilation/chkformat_clong_smalllong.d(20): Deprecation: argument `0LU` of type `ulong` does not match format specification
diff --git a/compiler/test/fail_compilation/fail17105.d b/compiler/test/fail_compilation/fail17105.d
index 407c40222c6f..14be167f9c85 100644
--- a/compiler/test/fail_compilation/fail17105.d
+++ b/compiler/test/fail_compilation/fail17105.d
@@ -1,5 +1,5 @@
 /* REQUIRED_ARGS: -m64
-DISABLED: win32 linux32 osx32 freebsd32 openbsd32
+DISABLED: win32 linux32 osx32 freebsd32 openbsd32 hurd32
 TEST_OUTPUT:
 ---
 fail_compilation/fail17105.d(20): Error: missing 4th parameter to `__simd()`
diff --git a/compiler/test/fail_compilation/fail18372.d b/compiler/test/fail_compilation/fail18372.d
index 6100894bb06e..8eb92786c0aa 100644
--- a/compiler/test/fail_compilation/fail18372.d
+++ b/compiler/test/fail_compilation/fail18372.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: win32 win64 linux32 osx32 freebsd32 openbsd32
+DISABLED: win32 win64 linux32 osx32 freebsd32 openbsd32 hurd32
 TEST_OUTPUT:
 ---
 fail_compilation/fail18372.d(103): Error: `__va_list_tag` is not defined, perhaps `import core.stdc.stdarg;` ?
diff --git a/compiler/test/fail_compilation/fail21227_win.d b/compiler/test/fail_compilation/fail21227_win.d
index a0a029f08f8f..00305ae7c900 100644
--- a/compiler/test/fail_compilation/fail21227_win.d
+++ b/compiler/test/fail_compilation/fail21227_win.d
@@ -1,6 +1,6 @@
 /*
 REQUIRED_ARGS: -Jfail_compilation
-DISABLED: linux osx freebsd dragonflybsd netbsd openbsd
+DISABLED: linux osx freebsd dragonflybsd netbsd openbsd hurd
 TEST_OUTPUT:
 ---
 fail_compilation\fail21227_win.d(2): Error: absolute path is not allowed in import expression: `"\\\\UNC\\path\\to\\file.txt"`
diff --git a/compiler/test/fail_compilation/fail3753.d b/compiler/test/fail_compilation/fail3753.d
index 97deb00eb86d..98ac1a323102 100644
--- a/compiler/test/fail_compilation/fail3753.d
+++ b/compiler/test/fail_compilation/fail3753.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: dragonflybsd freebsd linux osx win32 openbsd
+DISABLED: dragonflybsd freebsd linux osx win32 openbsd hurd
 TEST_OUTPUT:
 ---
 Error: cannot mix `core.std.stdlib.alloca()` and exception handling in `_Dmain()`
diff --git a/compiler/test/fail_compilation/fail6451.d b/compiler/test/fail_compilation/fail6451.d
index fcc1d76a70a9..7e1977bba928 100644
--- a/compiler/test/fail_compilation/fail6451.d
+++ b/compiler/test/fail_compilation/fail6451.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: win32 win64 linux32 osx32 freebsd32 openbsd32
+DISABLED: win32 win64 linux32 osx32 freebsd32 openbsd32 hurd32
 TEST_OUTPUT:
 ---
 fail_compilation/fail6451.d(9): Error: `__va_list_tag` is not defined, perhaps `import core.stdc.stdarg;` ?
diff --git a/compiler/test/fail_compilation/ice20042.d b/compiler/test/fail_compilation/ice20042.d
index 7a674b3c5464..383693219597 100644
--- a/compiler/test/fail_compilation/ice20042.d
+++ b/compiler/test/fail_compilation/ice20042.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: freebsd32 openbsd32 linux32 osx32 win32
+DISABLED: freebsd32 openbsd32 linux32 osx32 win32 hurd32
 TEST_OUTPUT:
 ---
 fail_compilation/ice20042.d(18): Error: slice operation `cast(__vector(float[4]))[nanF, nanF, nanF, nanF] = [1.0F, 2.0F, 3.0F, 4.0F][0..4]` cannot be evaluated at compile time
diff --git a/compiler/test/fail_compilation/ice20264.d b/compiler/test/fail_compilation/ice20264.d
index a8a1e7119bee..03ffa77931fd 100644
--- a/compiler/test/fail_compilation/ice20264.d
+++ b/compiler/test/fail_compilation/ice20264.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: freebsd32 openbsd32 linux32 osx32 win32
+DISABLED: freebsd32 openbsd32 linux32 osx32 win32 hurd32
 TEST_OUTPUT:
 ---
 fail_compilation/ice20264.d(12): Error: cannot modify expression `cast(__vector(float[4]))a` because it is not an lvalue
diff --git a/compiler/test/fail_compilation/impconv.d b/compiler/test/fail_compilation/impconv.d
index 0cc2deb13d86..e4026957f265 100644
--- a/compiler/test/fail_compilation/impconv.d
+++ b/compiler/test/fail_compilation/impconv.d
@@ -3,7 +3,7 @@ FIXME: DMD host compilers < 2.073 with faulty optimization
 lead to unfortunate test failures, see
 https://github.com/dlang/dmd/pull/6831#issuecomment-304495842.
 
-DISABLED: win32 win64 linux osx freebsd openbsd
+DISABLED: win32 win64 linux osx freebsd openbsd hurd
 */
 
 /*
diff --git a/compiler/test/fail_compilation/invalid_lib.d b/compiler/test/fail_compilation/invalid_lib.d
index 70121123a797..19eb4eaddf7a 100644
--- a/compiler/test/fail_compilation/invalid_lib.d
+++ b/compiler/test/fail_compilation/invalid_lib.d
@@ -1,6 +1,6 @@
 /*
 REQUIRED_ARGS: -lib
-REQUIRED_ARGS(linux freebsd osx openbsd): fail_compilation/extra-files/fake.a
+REQUIRED_ARGS(linux freebsd osx openbsd hurd): fail_compilation/extra-files/fake.a
 REQUIRED_ARGS(windows): -m32 fail_compilation/extra-files/fake.lib
 
 Use a regex because the path is really strange on Azure (OMF_32, 64):
diff --git a/compiler/test/fail_compilation/vector_types.d b/compiler/test/fail_compilation/vector_types.d
index 322bbc66cb52..f17dbc25e2b8 100644
--- a/compiler/test/fail_compilation/vector_types.d
+++ b/compiler/test/fail_compilation/vector_types.d
@@ -1,7 +1,7 @@
 /*
 REQUIRED_ARGS: -o-
 TEST_OUTPUT:
-DISABLED: freebsd32 openbsd32 linux32 osx32 win32
+DISABLED: freebsd32 openbsd32 linux32 osx32 win32 hurd32
 ---
 fail_compilation/vector_types.d(15): Error: 32 byte vector type `__vector(double[4])` is not supported on this platform
 fail_compilation/vector_types.d(16): Error: 32 byte vector type `__vector(float[8])` is not supported on this platform
diff --git a/compiler/test/fail_compilation/xmmslice.d b/compiler/test/fail_compilation/xmmslice.d
index f91ac1f52521..48f79c65d27c 100644
--- a/compiler/test/fail_compilation/xmmslice.d
+++ b/compiler/test/fail_compilation/xmmslice.d
@@ -1,6 +1,6 @@
 
 /* REQUIRED_ARGS: -mcpu=avx
-DISABLED: win32 freebsd32 openbsd32 linux32 osx32
+DISABLED: win32 freebsd32 openbsd32 linux32 osx32 hurd32
 TEST_OUTPUT:
 ---
 fail_compilation/xmmslice.d(110): Error: `__vector(int[4])` cannot be sliced with `[]`
diff --git a/compiler/test/run.d b/compiler/test/run.d
index d652292bd4b0..aca8f8528202 100755
--- a/compiler/test/run.d
+++ b/compiler/test/run.d
@@ -579,7 +579,7 @@ string[string] getEnvironment()
         env["PIC_FLAG"]  = pic ? "-fPIC" : "";
         env["DFLAGS"] = "-I%s/import -I%s".format(druntimePath, phobosPath)
             ~ " -L-L%s/%s".format(phobosPath, generatedSuffix);
-        bool isShared = environment.get("SHARED") != "0" && os.among("linux", "freebsd") > 0;
+        bool isShared = environment.get("SHARED") != "0" && os.among("linux", "freebsd", "hurd") > 0;
         if (isShared)
             env["DFLAGS"] = env["DFLAGS"] ~ " -defaultlib=libphobos2.so -L-rpath=%s/%s".format(phobosPath, generatedSuffix);
 
diff --git a/compiler/test/runnable/bitfieldsms.c b/compiler/test/runnable/bitfieldsms.c
index 5aee443d558f..85af0eb5f863 100644
--- a/compiler/test/runnable/bitfieldsms.c
+++ b/compiler/test/runnable/bitfieldsms.c
@@ -1,5 +1,5 @@
 /* test bitfields for Microsoft C
- * DISABLED: win32 linux freebsd openbsd osx
+ * DISABLED: win32 linux freebsd openbsd osx hurd
  * RUN_OUTPUT:
 ---
                 DM |   MS |  P32 |  P64
diff --git a/compiler/test/runnable/bitfieldsposix32.c b/compiler/test/runnable/bitfieldsposix32.c
index 790b594912c2..19804a06dbf0 100644
--- a/compiler/test/runnable/bitfieldsposix32.c
+++ b/compiler/test/runnable/bitfieldsposix32.c
@@ -1,5 +1,5 @@
 /* test bitfields
- * DISABLED: win32 win64 linux64 freebsd64 openbsd64 osx64
+ * DISABLED: win32 win64 linux64 freebsd64 openbsd64 osx64 hurd64
  * RUN_OUTPUT:
 ---
 T0 = 1 1 | 1 1
diff --git a/compiler/test/runnable/bitfieldsposix64.c b/compiler/test/runnable/bitfieldsposix64.c
index 8a2b089334b3..d4196376a9c0 100644
--- a/compiler/test/runnable/bitfieldsposix64.c
+++ b/compiler/test/runnable/bitfieldsposix64.c
@@ -1,5 +1,5 @@
 /* test bitfields
- * DISABLED: win32 win64 linux32 freebsd32 openbsd32 osx32
+ * DISABLED: win32 win64 linux32 freebsd32 openbsd32 osx32 hurd32
  * RUN_OUTPUT:
 ---
 T0 = 1 1 | 1 1
diff --git a/compiler/test/runnable/dbitfieldsdm.d b/compiler/test/runnable/dbitfieldsdm.d
index e18ad9abebb1..9e0da41056d0 100644
--- a/compiler/test/runnable/dbitfieldsdm.d
+++ b/compiler/test/runnable/dbitfieldsdm.d
@@ -2,7 +2,7 @@
  * Note that this test is for win32 only
  *
  *
- * DISABLED: win32mscoff win64 linux freebsd osx
+ * DISABLED: win32mscoff win64 linux freebsd osx hurd
  * RUN_OUTPUT:
 ---
                 DM |   MS |  P32 |  P64
diff --git a/compiler/test/runnable/dbitfieldsms.d b/compiler/test/runnable/dbitfieldsms.d
index 70a72c19b760..2021da221843 100644
--- a/compiler/test/runnable/dbitfieldsms.d
+++ b/compiler/test/runnable/dbitfieldsms.d
@@ -1,5 +1,5 @@
 /* test bitfields for Microsoft C
- * DISABLED: win32 linux freebsd openbsd osx
+ * DISABLED: win32 linux freebsd openbsd osx hurd
  * RUN_OUTPUT:
 ---
                 DM |   MS |  P32 |  P64
diff --git a/compiler/test/runnable/dbitfieldsposix32.d b/compiler/test/runnable/dbitfieldsposix32.d
index 26e44d29fc8a..6e1944cf2d5f 100644
--- a/compiler/test/runnable/dbitfieldsposix32.d
+++ b/compiler/test/runnable/dbitfieldsposix32.d
@@ -1,5 +1,5 @@
 /* test bitfields
- * DISABLED: win32 win64 linux64 freebsd64 openbsd64 osx64
+ * DISABLED: win32 win64 linux64 freebsd64 openbsd64 osx64 hurd64
  * RUN_OUTPUT:
 ---
 T0 = 1 1 | 1 1
diff --git a/compiler/test/runnable/dbitfieldsposix64.d b/compiler/test/runnable/dbitfieldsposix64.d
index 86c3a5d86105..972375d084d1 100644
--- a/compiler/test/runnable/dbitfieldsposix64.d
+++ b/compiler/test/runnable/dbitfieldsposix64.d
@@ -1,5 +1,5 @@
 /* test bitfields
- * DISABLED: win32 win64 linux32 freebsd32 openbsd32 osx32
+ * DISABLED: win32 win64 linux32 freebsd32 openbsd32 osx32 hurd32
  * RUN_OUTPUT:
 ---
 T0 = 1 1 | 1 1
diff --git a/compiler/test/runnable/dhry.d b/compiler/test/runnable/dhry.d
index 4d2e1b3c644a..598feda290d6 100644
--- a/compiler/test/runnable/dhry.d
+++ b/compiler/test/runnable/dhry.d
@@ -945,3 +945,18 @@ version (OpenBSD)
      return q;
     }
 }
+version (Hurd)
+{
+    import core.sys.posix.sys.time;
+
+    double dtime()
+    {
+     double q;
+     timeval tv;
+
+     gettimeofday(&tv,null);
+     q = cast(double)tv.tv_sec + cast(double)tv.tv_usec * 1.0e-6;
+
+     return q;
+    }
+}
diff --git a/compiler/test/runnable/ice21727.d b/compiler/test/runnable/ice21727.d
index c373c53c2542..e4f615297b71 100644
--- a/compiler/test/runnable/ice21727.d
+++ b/compiler/test/runnable/ice21727.d
@@ -1,5 +1,5 @@
 // REQUIRED_ARGS: -m64 -O -inline
-// DISABLED: win32 linux32 freebsd32 osx32 openbsd32 netbsd32 dragonflybsd32
+// DISABLED: win32 linux32 freebsd32 osx32 openbsd32 netbsd32 dragonflybsd32 hurd32
 // https://issues.dlang.org/show_bug.cgi?id=21727
 
 import core.simd;
diff --git a/compiler/test/runnable/test22.d b/compiler/test/runnable/test22.d
index 38a9cc367e52..2087c17ff89d 100644
--- a/compiler/test/runnable/test22.d
+++ b/compiler/test/runnable/test22.d
@@ -756,6 +756,36 @@ do
             fxch    ST(1)               ; // ST1 = r, ST0 = x
             fstp    ST(0)               ; // dump x
             align   4                   ;
+    return_ST:                          ;
+            ;
+        }
+        }
+        else version (Hurd)
+        {
+        asm     // assembler by W. Bright
+        {
+            // EDX = (A.length - 1) * real.sizeof
+            mov     ECX,A[EBP]          ; // ECX = A.length
+            dec     ECX                 ;
+            lea     EDX,[ECX][ECX*8]    ;
+            add     EDX,ECX             ;
+            add     EDX,ECX             ;
+            add     EDX,ECX             ;
+            add     EDX,A+4[EBP]        ;
+            fld     real ptr [EDX]      ; // ST0 = coeff[ECX]
+            jecxz   return_ST           ;
+            fld     x[EBP]              ; // ST0 = x
+            fxch    ST(1)               ; // ST1 = x, ST0 = r
+            align   4                   ;
+    L2:     fmul    ST,ST(1)            ; // r *= x
+            fld     real ptr -12[EDX]   ;
+            sub     EDX,12              ; // deg--
+            faddp   ST(1),ST            ;
+            dec     ECX                 ;
+            jne     L2                  ;
+            fxch    ST(1)               ; // ST1 = r, ST0 = x
+            fstp    ST(0)               ; // dump x
+            align   4                   ;
     return_ST:                          ;
             ;
         }
diff --git a/compiler/test/runnable/test23343.c b/compiler/test/runnable/test23343.c
index 27ff5a7cb80a..eeb3f1054ee0 100644
--- a/compiler/test/runnable/test23343.c
+++ b/compiler/test/runnable/test23343.c
@@ -1,4 +1,4 @@
-/* DISABLED: win linux freebsd openbsd osx32 dragonflybsd netbsd
+/* DISABLED: win linux freebsd openbsd osx32 dragonflybsd netbsd hurd
  */
 
 /* https://issues.dlang.org/show_bug.cgi?id=23343
diff --git a/compiler/test/runnable/test_cdstrpar.d b/compiler/test/runnable/test_cdstrpar.d
index 90aa499ab9c9..1a2907de96a0 100644
--- a/compiler/test/runnable/test_cdstrpar.d
+++ b/compiler/test/runnable/test_cdstrpar.d
@@ -1,7 +1,7 @@
 // REQUIRED_ARGS: -O -fPIC
 // PERMUTE_ARGS:
 // only testing on SYSV-ABI, but backend code is identical across platforms
-// DISABLED: win32 win64 osx linux32 freebsd32 openbsd32
+// DISABLED: win32 win64 osx linux32 freebsd32 openbsd32 hurd32
 debug = PRINTF;
 debug (PRINTF) import core.stdc.stdio;
 
diff --git a/compiler/test/runnable/testargtypes.d b/compiler/test/runnable/testargtypes.d
index 4492420aa8f3..8f08348a6195 100644
--- a/compiler/test/runnable/testargtypes.d
+++ b/compiler/test/runnable/testargtypes.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: win32 win64 osx32 linux32 freebsd32 openbsd32
+DISABLED: win32 win64 osx32 linux32 freebsd32 openbsd32 hurd32
 */
 
 void chkArgTypes(S, V...)()
diff --git a/compiler/test/runnable_cxx/cpp_abi_tests.d b/compiler/test/runnable_cxx/cpp_abi_tests.d
index 4e241749fbc9..524000981667 100644
--- a/compiler/test/runnable_cxx/cpp_abi_tests.d
+++ b/compiler/test/runnable_cxx/cpp_abi_tests.d
@@ -1,5 +1,5 @@
 // EXTRA_CPP_SOURCES: cpp_abi_tests.cpp
-// CXXFLAGS(linux freebsd osx openbsd netbsd dragonflybsd): -std=c++11
+// CXXFLAGS(linux freebsd osx openbsd netbsd dragonflybsd hurd): -std=c++11
 
 // N.B MSVC doesn't have a C++11 switch, but it defaults to the latest fully-supported standard
 // N.B MSVC 2013 doesn't support char16_t/char32_t
diff --git a/compiler/test/runnable_cxx/cppa.d b/compiler/test/runnable_cxx/cppa.d
index c62bc6face18..f7bc0358959e 100644
--- a/compiler/test/runnable_cxx/cppa.d
+++ b/compiler/test/runnable_cxx/cppa.d
@@ -2,7 +2,7 @@
 // PERMUTE_ARGS: -g
 // EXTRA_CPP_SOURCES: cppb.cpp
 // EXTRA_FILES: extra-files/cppb.h
-// CXXFLAGS(linux freebsd osx openbsd netbsd dragonflybsd): -std=c++11
+// CXXFLAGS(linux freebsd osx openbsd netbsd dragonflybsd hurd): -std=c++11
 // druntime isn't linked, this prevents missing symbols '_d_arraybounds_slicep':
 // REQUIRED_ARGS: -checkaction=C
 // TRANSFORM_OUTPUT: remove_lines("warning: vsprintf\(\) is often misused")
diff --git a/compiler/test/runnable_cxx/nonpod_byval.d b/compiler/test/runnable_cxx/nonpod_byval.d
index c7fac46a040a..4314d6b3a81d 100644
--- a/compiler/test/runnable_cxx/nonpod_byval.d
+++ b/compiler/test/runnable_cxx/nonpod_byval.d
@@ -1,5 +1,5 @@
 // EXTRA_CPP_SOURCES: cpp_nonpod_byval.cpp
-// CXXFLAGS(linux osx freebsd dragonflybsd): -std=c++11
+// CXXFLAGS(linux osx freebsd dragonflybsd hurd): -std=c++11
 
 extern (C) int printf(const(char)*, ...);
 
diff --git a/compiler/test/tools/paths.d b/compiler/test/tools/paths.d
index acb525bda745..1b1ca9d07ccd 100644
--- a/compiler/test/tools/paths.d
+++ b/compiler/test/tools/paths.d
@@ -27,6 +27,8 @@ else version (Solaris)
     enum os = "solaris";
 else version (SunOS)
     enum os = "solaris";
+else version (Hurd)
+    enum os = "hurd";
 else
     static assert(0, "Unrecognized or unsupported OS.");
 

From e2c7b97ce5642ef5bed12083222feacc7784bb23 Mon Sep 17 00:00:00 2001
From: Yelninei <yelninei@tutamail.com>
Date: Fri, 27 Mar 2026 14:56:20 +0000
Subject: [PATCH 2/3] druntime: Port to GNU/Hurd.

---
 druntime/Makefile                             |   2 +-
 druntime/mak/COPY                             |  10 +
 druntime/src/core/demangle.d                  |   1 +
 druntime/src/core/internal/backtrace/elf.d    |   5 +
 druntime/src/core/internal/elf/dl.d           |  14 +
 druntime/src/core/internal/elf/io.d           |   9 +
 druntime/src/core/internal/execinfo.d         |   2 +
 druntime/src/core/internal/gc/os.d            |   2 +
 druntime/src/core/stdc/config.d               |   4 +
 druntime/src/core/stdc/errno.d                | 107 +++
 druntime/src/core/stdc/limits.d               |  14 +
 druntime/src/core/sys/hurd/config.d           |  30 +
 druntime/src/core/sys/hurd/dlfcn.d            | 114 +++
 druntime/src/core/sys/hurd/elf.d              | 162 ++++
 druntime/src/core/sys/hurd/errno.d            |  21 +
 druntime/src/core/sys/hurd/execinfo.d         |  16 +
 druntime/src/core/sys/hurd/link.d             | 134 ++++
 druntime/src/core/sys/hurd/sys/types.d        |  22 +
 druntime/src/core/sys/hurd/time.d             |  15 +
 druntime/src/core/sys/hurd/unistd.d           |  30 +
 druntime/src/core/sys/posix/dirent.d          |  11 +
 druntime/src/core/sys/posix/fcntl.d           | 107 +++
 druntime/src/core/sys/posix/netinet/in_.d     |  58 +-
 druntime/src/core/sys/posix/poll.d            |  16 +
 druntime/src/core/sys/posix/pthread.d         | 218 ++++--
 druntime/src/core/sys/posix/sched.d           |  11 +
 druntime/src/core/sys/posix/semaphore.d       |  32 +-
 druntime/src/core/sys/posix/signal.d          | 189 ++++-
 druntime/src/core/sys/posix/spawn.d           |  42 ++
 druntime/src/core/sys/posix/sys/ioctl.d       |  37 +
 druntime/src/core/sys/posix/sys/ipc.d         |  43 ++
 druntime/src/core/sys/posix/sys/mman.d        |  33 +
 druntime/src/core/sys/posix/sys/msg.d         |  44 ++
 druntime/src/core/sys/posix/sys/resource.d    |  58 ++
 druntime/src/core/sys/posix/sys/shm.d         |  26 +
 druntime/src/core/sys/posix/sys/socket.d      | 161 ++++
 druntime/src/core/sys/posix/sys/stat.d        |  74 ++
 druntime/src/core/sys/posix/sys/statvfs.d     | 152 ++--
 druntime/src/core/sys/posix/sys/types.d       | 703 +++++++++++-------
 druntime/src/core/sys/posix/sys/un.d          |  13 +
 druntime/src/core/sys/posix/sys/utsname.d     |  39 +-
 druntime/src/core/sys/posix/sys/wait.d        |  23 +
 druntime/src/core/sys/posix/termios.d         | 102 +++
 druntime/src/core/sys/posix/time.d            |  12 +
 .../core/thread/fiber/switch_context_asm.S    |   2 +-
 druntime/src/core/thread/osthread.d           |   8 +
 druntime/src/core/time.d                      |  25 +
 druntime/src/importc.h                        |   4 +-
 druntime/src/rt/sections_elf_shared.d         |   8 +
 .../importc_compare/src/importc_compare.d     |   4 +
 .../test/profile/myprofilegc.log.hurd.32.exp  |  18 +
 .../test/profile/myprofilegc.log.hurd.64.exp  |  18 +
 druntime/test/shared/src/load.d               |   1 +
 53 files changed, 2587 insertions(+), 419 deletions(-)
 create mode 100644 druntime/src/core/sys/hurd/config.d
 create mode 100644 druntime/src/core/sys/hurd/dlfcn.d
 create mode 100644 druntime/src/core/sys/hurd/elf.d
 create mode 100644 druntime/src/core/sys/hurd/errno.d
 create mode 100644 druntime/src/core/sys/hurd/execinfo.d
 create mode 100644 druntime/src/core/sys/hurd/link.d
 create mode 100644 druntime/src/core/sys/hurd/sys/types.d
 create mode 100644 druntime/src/core/sys/hurd/time.d
 create mode 100644 druntime/src/core/sys/hurd/unistd.d
 create mode 100644 druntime/test/profile/myprofilegc.log.hurd.32.exp
 create mode 100644 druntime/test/profile/myprofilegc.log.hurd.64.exp

diff --git a/druntime/Makefile b/druntime/Makefile
index 1b5f4165ce89..17452874b730 100644
--- a/druntime/Makefile
+++ b/druntime/Makefile
@@ -76,7 +76,7 @@ endif
 
 # build with shared library support
 # (defaults to true on supported platforms, can be overridden w/ make SHARED=0)
-SHARED=$(if $(findstring $(OS),linux freebsd dragonflybsd),1,)
+SHARED=$(if $(findstring $(OS),linux freebsd dragonflybsd hurd),1,)
 
 LINKDL=$(if $(findstring $(OS),linux),-L-ldl,)
 
diff --git a/druntime/mak/COPY b/druntime/mak/COPY
index 5bd19b0b46c3..346877baad14 100644
--- a/druntime/mak/COPY
+++ b/druntime/mak/COPY
@@ -394,6 +394,16 @@ COPY=\
 	$(IMPDIR)\core\sys\solaris\sys\regset.d \
 	$(IMPDIR)\core\sys\solaris\sys\types.d \
 	\
+	$(IMPDIR)\core\sys\hurd\config.d \
+	$(IMPDIR)\core\sys\hurd\dlfcn.d \
+	$(IMPDIR)\core\sys\hurd\elf.d \
+	$(IMPDIR)\core\sys\hurd\execinfo.d \
+	$(IMPDIR)\core\sys\hurd\errno.d \
+	$(IMPDIR)\core\sys\hurd\link.d \
+	$(IMPDIR)\core\sys\hurd\sys\types.d \
+	$(IMPDIR)\core\sys\hurd\time.d \
+	$(IMPDIR)\core\sys\hurd\unistd.d \
+	\
 	$(IMPDIR)\core\sys\windows\accctrl.d \
 	$(IMPDIR)\core\sys\windows\aclapi.d \
 	$(IMPDIR)\core\sys\windows\aclui.d \
diff --git a/druntime/src/core/demangle.d b/druntime/src/core/demangle.d
index 38be4e33de53..5c6b1734b199 100644
--- a/druntime/src/core/demangle.d
+++ b/druntime/src/core/demangle.d
@@ -2996,6 +2996,7 @@ CXX_DEMANGLER getCXXDemangler() nothrow @trusted
         version (OpenBSD) import core.sys.openbsd.dlfcn : RTLD_DEFAULT;
         version (Darwin) import core.sys.darwin.dlfcn : RTLD_DEFAULT;
         version (Solaris) import core.sys.solaris.dlfcn : RTLD_DEFAULT;
+        version (Hurd) import core.sys.hurd.dlfcn : RTLD_DEFAULT;
 
         if (auto found = cast(CXX_DEMANGLER) dlsym(RTLD_DEFAULT, "__cxa_demangle"))
             atomicStore(__cxa_demangle, found);
diff --git a/druntime/src/core/internal/backtrace/elf.d b/druntime/src/core/internal/backtrace/elf.d
index 1a235537bb3c..6da1ef1ecbae 100644
--- a/druntime/src/core/internal/backtrace/elf.d
+++ b/druntime/src/core/internal/backtrace/elf.d
@@ -36,6 +36,11 @@ else version (Solaris)
     import core.sys.solaris.sys.elf : SHF_COMPRESSED, ET_DYN;
     version = LinuxOrBSD;
 }
+else version (Hurd)
+{
+    import core.sys.hurd.elf : SHF_COMPRESSED, ET_DYN;
+    version = LinuxOrBSD;
+}
 
 version (LinuxOrBSD):
 
diff --git a/druntime/src/core/internal/elf/dl.d b/druntime/src/core/internal/elf/dl.d
index 963b4249a396..c7b24e854af8 100644
--- a/druntime/src/core/internal/elf/dl.d
+++ b/druntime/src/core/internal/elf/dl.d
@@ -41,6 +41,11 @@ else version (Solaris)
     import core.sys.solaris.link : dl_iterate_phdr, dl_phdr_info, ElfW;
     version = LinuxOrBSD;
 }
+else version (Hurd)
+{
+    import core.sys.hurd.link : dl_iterate_phdr, dl_phdr_info, ElfW;
+    version = LinuxOrBSD;
+}
 
 version (LinuxOrBSD):
 
@@ -93,6 +98,7 @@ struct SharedObject
         else version (NetBSD)  enum IterateManually = true;
         else version (OpenBSD) enum IterateManually = true;
         else version (Solaris) enum IterateManually = true;
+        else version (Hurd)    enum IterateManually = true;
         else                   enum IterateManually = false;
 
         static if (IterateManually)
@@ -225,6 +231,14 @@ version (Linux_Use_GNU)
         return program_invocation_name;
     }
 }
+else version (Hurd)
+{
+    const(char)* getprogname()
+    {
+        import core.sys.hurd.errno : program_invocation_name;
+        return program_invocation_name;
+    }
+}
 else // Bionic, BSDs
 {
     extern(C) const(char)* getprogname();
diff --git a/druntime/src/core/internal/elf/io.d b/druntime/src/core/internal/elf/io.d
index 80c9415e149e..437589ec9779 100644
--- a/druntime/src/core/internal/elf/io.d
+++ b/druntime/src/core/internal/elf/io.d
@@ -50,6 +50,11 @@ else version (Solaris)
     import core.sys.solaris.link : ElfW;
     version = LinuxOrBSD;
 }
+else version (Hurd)
+{
+    import core.sys.hurd.link : ElfW;
+    version = LinuxOrBSD;
+}
 
 /**
  * File-based memory-mapped I/O (read-only).
@@ -403,6 +408,10 @@ char* thisExePath()
         import core.sys.openbsd.stdlib : getprogname;
         return strdup(getprogname());
     }
+    else version (Hurd)
+    {
+        return readLink("/proc/self/exe");
+    }
     else
     {
         version (DragonFlyBSD)
diff --git a/druntime/src/core/internal/execinfo.d b/druntime/src/core/internal/execinfo.d
index 1ea467afbe22..ce7d6de36eef 100644
--- a/druntime/src/core/internal/execinfo.d
+++ b/druntime/src/core/internal/execinfo.d
@@ -68,6 +68,8 @@ else version (DragonFlyBSD)
     import _execinfo = core.sys.dragonflybsd.execinfo : backtrace, backtrace_symbols, backtrace_symbols_fd;
 else version (Solaris)
     import _execinfo = core.sys.solaris.execinfo : backtrace, backtrace_symbols, backtrace_symbols_fd;
+else version (Hurd)
+    import _execinfo = core.sys.hurd.execinfo : backtrace, backtrace_symbols, backtrace_symbols_fd;
 
 /// Indicates the availability of backtrace functions
 enum bool hasExecinfo = is(_execinfo == module);
diff --git a/druntime/src/core/internal/gc/os.d b/druntime/src/core/internal/gc/os.d
index 914b7b903c7e..cdefbb87a420 100644
--- a/druntime/src/core/internal/gc/os.d
+++ b/druntime/src/core/internal/gc/os.d
@@ -95,6 +95,8 @@ else version (Posix)
         version = GCSignalsUnblock;
     version (Solaris)
         version = GCSignalsUnblock;
+    version (Hurd)
+        version = GCSignalsUnblock;
 
     //version = GC_Use_Alloc_MMap;
 }
diff --git a/druntime/src/core/stdc/config.d b/druntime/src/core/stdc/config.d
index 7c5b53df1ff4..17bce4e7404e 100644
--- a/druntime/src/core/stdc/config.d
+++ b/druntime/src/core/stdc/config.d
@@ -259,6 +259,8 @@ else version (DigitalMars)
             alias c_long_double = real;
         else version (Darwin)
             alias c_long_double = real;
+        else version (Hurd)
+            alias c_long_double = real;
     }
     else version (AArch64)
     {
@@ -276,6 +278,8 @@ else version (DigitalMars)
             alias c_long_double = real;
         else version (Darwin)
             alias c_long_double = real;
+        else version (Hurd)
+            alias c_long_double = real;
     }
 }
 
diff --git a/druntime/src/core/stdc/errno.d b/druntime/src/core/stdc/errno.d
index db347e404b42..ee48ac2e17b7 100644
--- a/druntime/src/core/stdc/errno.d
+++ b/druntime/src/core/stdc/errno.d
@@ -2457,6 +2457,113 @@ else version (WASI)
     enum ERFKILL         = 132;
     enum EHWPOISON       = 133;
 }
+else version (Hurd)
+{
+    enum EPERM                          = 0x40000001;   /* Operation not permitted */
+    enum ENOENT                         = 0x40000002;   /* No such file or directory */
+    enum ESRCH                          = 0x40000003;   /* No such process */
+    enum EINTR                          = 0x40000004;   /* Interrupted system call */
+    enum EIO                            = 0x40000005;   /* Input/output error */
+    enum ENXIO                          = 0x40000006;   /* No such device or address */
+    enum E2BIG                          = 0x40000007;   /* Argument list too long */
+    enum ENOEXEC                        = 0x40000008;   /*enum Exec format error */
+    enum EBADF                          = 0x40000009;   /* Bad file descriptor */
+    enum ECHILD                         = 0x4000000a;   /* No child processes */
+    enum EDEADLK                        = 0x4000000b;   /* Resource deadlock avoided */
+    enum ENOMEM                         = 0x4000000c;   /* Cannot allocate memory */
+    enum EACCES                         = 0x4000000d;   /* Permission denied */
+    enum EFAULT                         = 0x4000000e;   /* Bad address */
+    enum ENOTBLK                        = 0x4000000f;   /* Block device required */
+    enum EBUSY                          = 0x40000010;   /* Device or resource busy */
+    enum EEXIST                         = 0x40000011;   /* File exists */
+    enum EXDEV                          = 0x40000012;   /* Invalid cross-device link */
+    enum ENODEV                         = 0x40000013;   /* No such device */
+    enum ENOTDIR                        = 0x40000014;   /* Not a directory */
+    enum EISDIR                         = 0x40000015;   /* Is a directory */
+    enum EINVAL                         = 0x40000016;   /* Invalid argument */
+    enum EMFILE                         = 0x40000018;   /* Too many open files */
+    enum ENFILE                         = 0x40000017;   /* Too many open files in system */
+    enum ENOTTY                         = 0x40000019;   /* Inappropriate ioctl for device */
+    enum ETXTBSY                        = 0x4000001a;   /* Text file busy */
+    enum EFBIG                          = 0x4000001b;   /* File too large */
+    enum ENOSPC                         = 0x4000001c;   /* No space left on device */
+    enum ESPIPE                         = 0x4000001d;   /* Illegal seek */
+    enum EROFS                          = 0x4000001e;   /* Read-only file system */
+    enum EMLINK                         = 0x4000001f;   /* Too many links */
+    enum EPIPE                          = 0x40000020;   /* Broken pipe */
+    enum EDOM                           = 0x40000021;   /* Numerical argument out of domain */
+    enum ERANGE                         = 0x40000022;   /* Numerical result out of range */
+    enum EAGAIN                         = 0x40000023;   /* Resource temporarily unavailable */
+    enum EINPROGRESS                    = 0x40000024;   /* Operation now in progress */
+    enum EALREADY                       = 0x40000025;   /* Operation already in progress */
+    enum ENOTSOCK                       = 0x40000026;   /* Socket operation on non-socket */
+    enum EMSGSIZE                       = 0x40000028;   /* Message too long */
+    enum EPROTOTYPE                     = 0x40000029;   /* Protocol wrong type for socket */
+    enum ENOPROTOOPT                    = 0x4000002a;   /* Protocol not available */
+    enum EPROTONOSUPPORT                = 0x4000002b;   /* Protocol not supported */
+    enum ESOCKTNOSUPPORT                = 0x4000002c;   /* Socket type not supported */
+    enum EOPNOTSUPP                     = 0x4000002d;   /* Operation not supported */
+    enum EPFNOSUPPORT                   = 0x4000002e;   /* Protocol family not supported */
+    enum EAFNOSUPPORT                   = 0x4000002f;   /* Address family not supported by protocol */
+    enum EADDRINUSE                     = 0x40000030;   /* Address already in use */
+    enum EADDRNOTAVAIL                  = 0x40000031;   /* Cannot assign requested address */
+    enum ENETDOWN                       = 0x40000032;   /* Network is down */
+    enum ENETUNREACH                    = 0x40000033;   /* Network is unreachable */
+    enum ENETRESET                      = 0x40000034;   /* Network dropped connection on reset */
+    enum ECONNABORTED                   = 0x40000035;   /* Software caused connection abort */
+    enum ECONNRESET                     = 0x40000036;   /* Connection reset by peer */
+    enum ENOBUFS                        = 0x40000037;   /* No buffer space available */
+    enum EISCONN                        = 0x40000038;   /* Transport endpoint is already connected */
+    enum ENOTCONN                       = 0x40000039;   /* Transport endpoint is not connected */
+    enum EDESTADDRREQ                   = 0x40000027;   /* Destination address required */
+    enum ESHUTDOWN                      = 0x4000003a;   /* Cannot send after transport endpoint shutdown */
+    enum ETOOMANYREFS                   = 0x4000003b;   /* Too many references: cannot splice */
+    enum ETIMEDOUT                      = 0x4000003c;   /* Connection timed out */
+    enum ECONNREFUSED                   = 0x4000003d;   /* Connection refused */
+    enum ELOOP                          = 0x4000003e;   /* Too many levels of symbolic links */
+    enum ENAMETOOLONG                   = 0x4000003f;   /* File name too long */
+    enum EHOSTDOWN                      = 0x40000040;   /* Host is down */
+    enum EHOSTUNREACH                   = 0x40000041;   /* No route to host */
+    enum ENOTEMPTY                      = 0x40000042;   /* Directory not empty */
+    enum EPROCLIM                       = 0x40000043;   /* Too many processes */
+    enum EUSERS                         = 0x40000044;   /* Too many users */
+    enum EDQUOT                         = 0x40000045;   /* Disk quota exceeded */
+    enum ESTALE                         = 0x40000046;   /* Stale file handle */
+    enum EREMOTE                        = 0x40000047;   /* Object is remote */
+    enum EBADRPC                        = 0x40000048;   /* RPC struct is bad */
+    enum ERPCMISMATCH                   = 0x40000049;   /* RPC version wrong */
+    enum EPROGUNAVAIL                   = 0x4000004a;   /* RPC program not available */
+    enum EPROGMISMATCH                  = 0x4000004b;   /* RPC program version wrong */
+    enum EPROCUNAVAIL                   = 0x4000004c;   /* RPC bad procedure for program */
+    enum ENOLCK                         = 0x4000004d;   /* No locks available */
+    enum EFTYPE                         = 0x4000004f;   /* Inappropriate file type or format */
+    enum EAUTH                          = 0x40000050;   /* Authentication error */
+    enum ENEEDAUTH                      = 0x40000051;   /* Need authenticator */
+    enum ENOSYS                         = 0x4000004e;   /* Function not implemented */
+    enum ELIBEXEC                       = 0x40000053;   /* Cannot exec a shared library directly */
+    enum ENOTSUP                        = 0x40000076;   /* Not supported */
+    enum EILSEQ                         = 0x4000006a;   /* Invalid or incomplete multibyte or wide character */
+    enum EBACKGROUND                    = 0x40000064;   /* Inappropriate operation for background process */
+    enum EDIED                          = 0x40000065;   /* Translator died */
+    enum ED                             = 0x40000066;   /* ? */
+    enum EGREGIOUS                      = 0x40000067;   /* You really blew it this time */
+    enum EIEIO                          = 0x40000068;   /* Computer bought the farm */
+    enum EGRATUITOUS                    = 0x40000069;   /* Gratuitous error */
+    enum EBADMSG                        = 0x4000006b;   /* Bad message */
+    enum EIDRM                          = 0x4000006c;   /* Identifier removed */
+    enum EMULTIHOP                      = 0x4000006d;   /* Multihop attempted */
+    enum ENODATA                        = 0x4000006e;   /* No data available */
+    enum ENOLINK                        = 0x4000006f;   /* Link has been severed */
+    enum ENOMSG                         = 0x40000070;   /* No message of desired type */
+    enum ENOSR                          = 0x40000071;   /* Out of streams resources */
+    enum ENOSTR                         = 0x40000072;   /* Device not a stream */
+    enum EOVERFLOW                      = 0x40000073;   /* Value too large for defined data type */
+    enum EPROTO                         = 0x40000074;   /* Protocol error */
+    enum ETIME                          = 0x40000075;   /* Timer expired */
+    enum ECANCELED                      = 0x40000077;   /* Operation canceled */
+    enum EOWNERDEAD                     = 0x40000078;   /* Owner died */
+    enum ENOTRECOVERABLE                = 0x40000079;   /* State not recoverable */
+ }
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/stdc/limits.d b/druntime/src/core/stdc/limits.d
index 2684b22bfcd6..35ee96a052e1 100644
--- a/druntime/src/core/stdc/limits.d
+++ b/druntime/src/core/stdc/limits.d
@@ -181,5 +181,19 @@ else version (Windows)
     ///
     enum PIPE_BUF       = 5120;
 }
+else version (Hurd)
+{
+    // no arbitrary fixed limits
+    ///
+    // enum MAX_CANON
+    ///
+    // enum MAX_INPUT
+    ///
+    enum NAME_MAX       = 255;
+    ///
+    // enum PATH_MAX
+    ///
+    // enum PIPE_BUF
+}
 else
     static assert(0, "unsupported OS");
diff --git a/druntime/src/core/sys/hurd/config.d b/druntime/src/core/sys/hurd/config.d
new file mode 100644
index 000000000000..109990d5444c
--- /dev/null
+++ b/druntime/src/core/sys/hurd/config.d
@@ -0,0 +1,30 @@
+/**
+ * D header file for GNU/Hurd.
+ *
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ */
+module core.sys.hurd.config;
+
+version (Hurd):
+
+public import core.sys.posix.config;
+
+// man 7 feature_test_macros
+// http://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html
+enum _GNU_SOURCE = true;
+// deduced <features.h>
+// http://sourceware.org/git/?p=glibc.git;a=blob;f=include/features.h
+enum _DEFAULT_SOURCE = true;
+enum _ATFILE_SOURCE = true;
+
+// _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for _DEFAULT_SOURCE.
+deprecated("use _DEFAULT_SOURCE")
+{
+    enum _BSD_SOURCE = true;
+    enum _SVID_SOURCE = true;
+}
+
+enum __USE_MISC = _DEFAULT_SOURCE;
+enum __USE_ATFILE = _ATFILE_SOURCE;
+enum __USE_GNU = _GNU_SOURCE;
diff --git a/druntime/src/core/sys/hurd/dlfcn.d b/druntime/src/core/sys/hurd/dlfcn.d
new file mode 100644
index 000000000000..d49650751199
--- /dev/null
+++ b/druntime/src/core/sys/hurd/dlfcn.d
@@ -0,0 +1,114 @@
+/**
+ * D header file for GNU/Hurd.
+ *
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ * $(LINK2 http://sourceware.org/git/?p=glibc.git;a=blob;f=dlfcn/dlfcn.h, glibc dlfcn/dlfcn.h)
+ */
+module core.sys.hurd.dlfcn;
+
+version (Hurd):
+extern (C):
+nothrow:
+@nogc:
+@system:
+
+
+public import core.sys.posix.dlfcn;
+import core.sys.hurd.config;
+
+// <bits/dlfcn.h>
+
+// http://sourceware.org/git/?p=glibc.git;a=blob;f=bits/dlfcn.h
+// enum RTLD_LAZY = 0x00001; // POSIX
+// enum RTLD_NOW = 0x00002; // POSIX
+enum RTLD_BINDING_MASK = 0x3;
+enum RTLD_NOLOAD = 0x00004;
+enum RTLD_DEEPBIND = 0x00008;
+
+// enum RTLD_GLOBAL = 0x00100; // POSIX
+// enum RTLD_LOCAL = 0; // POSIX
+enum RTLD_NODELETE = 0x01000;
+
+static if (__USE_GNU)
+{
+    RT DL_CALL_FCT(RT, Args...)(RT function(Args) fctp, auto ref Args args)
+    {
+        _dl_mcount_wrapper_check(cast(void*)fctp);
+        return fctp(args);
+    }
+
+    void _dl_mcount_wrapper_check(void* __selfpc);
+}
+// <bits/dlfcn.h>
+
+static if (__USE_GNU)
+{
+    enum RTLD_NEXT = cast(void *)-1L;
+    enum RTLD_DEFAULT = cast(void *)0;
+    alias Lmid_t = c_long;
+    enum LM_ID_BASE = 0;
+    enum LM_ID_NEWLM = -1;
+}
+
+// void* dlopen(const scope char* __file, int __mode); // POSIX
+// int dlclose(void* __handle); // POSIX
+// void* dlsym(void* __handle, const scope char* __name); // POSIX
+
+static if (__USE_GNU)
+{
+    void* dlmopen(Lmid_t __nsid, const scope char* __file, int __mode);
+    void* dlvsym(void* __handle, const scope char* __name, const scope char* __version);
+}
+
+// char* dlerror(); // POSIX
+
+static if (__USE_GNU)
+{
+    struct Dl_info
+    {
+        const(char)* dli_fname;
+        void* dli_fbase;
+        const(char)* dli_sname;
+        void* dli_saddr;
+    }
+
+    int dladdr(const scope void* __address, Dl_info* __info);
+    int dladdr1(void* __address, Dl_info* __info, void** __extra_info, int __flags);
+
+    enum
+    {
+        RTLD_DL_SYMENT = 1,
+        RTLD_DL_LINKMAP = 2,
+    }
+
+    int dlinfo(void* __handle, int __request, void* __arg);
+
+    enum
+    {
+        RTLD_DI_LMID = 1,
+        RTLD_DI_LINKMAP = 2,
+        RTLD_DI_CONFIGADDR = 3,
+        RTLD_DI_SERINFO = 4,
+        RTLD_DI_SERINFOSIZE = 5,
+        RTLD_DI_ORIGIN = 6,
+        RTLD_DI_PROFILENAME = 7,
+        RTLD_DI_PROFILEOUT = 8,
+        RTLD_DI_TLS_MODID = 9,
+        RTLD_DI_TLS_DATA = 10,
+        RTLD_DI_MAX = 10,
+    }
+
+    struct Dl_serpath
+    {
+        char* dls_name;
+        uint dls_flags;
+    }
+
+    struct Dl_serinfo
+    {
+        size_t dls_size;
+        uint dls_cnt;
+        Dl_serpath[1] dls_serpath;
+    }
+}
diff --git a/druntime/src/core/sys/hurd/elf.d b/druntime/src/core/sys/hurd/elf.d
new file mode 100644
index 000000000000..47080ecbcbc9
--- /dev/null
+++ b/druntime/src/core/sys/hurd/elf.d
@@ -0,0 +1,162 @@
+/**
+ * D header file for GNU/Hurd.
+ *
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ * $(LINK2 http://sourceware.org/git/?p=glibc.git;a=blob;f=elf/elf.h, glibc elf/elf.h)
+ */
+module core.sys.hurd.elf;
+
+version (Hurd):
+extern (C):
+pure:
+nothrow:
+@system:
+
+import core.stdc.stdint;
+public import core.sys.elf;
+
+extern (D)
+{
+    auto ELF32_ST_VISIBILITY(O)(O o) { return o & 0x03; }
+    alias ELF64_ST_VISIBILITY = ELF32_ST_VISIBILITY;
+}
+
+struct Elf32_Nhdr
+{
+    Elf32_Word n_namesz;
+    Elf32_Word n_descsz;
+    Elf32_Word n_type;
+}
+
+struct Elf64_Nhdr
+{
+    Elf64_Word n_namesz;
+    Elf64_Word n_descsz;
+    Elf64_Word n_type;
+}
+
+enum NT_PRSTATUS =     1;
+enum NT_FPREGSET =     2;
+enum NT_PRPSINFO =     3;
+enum NT_PRXREG =       4;
+enum NT_TASKSTRUCT =   4;
+enum NT_PLATFORM =     5;
+enum NT_AUXV =         6;
+enum NT_GWINDOWS =     7;
+enum NT_ASRS =         8;
+enum NT_PSTATUS =      10;
+enum NT_PSINFO =       13;
+enum NT_PRCRED =       14;
+enum NT_UTSNAME =      15;
+enum NT_LWPSTATUS =    16;
+enum NT_LWPSINFO =     17;
+enum NT_PRFPXREG =     20;
+enum NT_SIGINFO =      0x53494749;
+enum NT_FILE =         0x46494c45;
+enum NT_PRXFPREG =     0x46e62b7f;
+enum NT_PPC_VMX =      0x100;
+enum NT_PPC_SPE =      0x101;
+enum NT_PPC_VSX =      0x102;
+enum NT_386_TLS =      0x200;
+enum NT_386_IOPERM =   0x201;
+enum NT_X86_XSTATE =   0x202;
+enum NT_S390_HIGH_GPRS =       0x300;
+enum NT_S390_TIMER =   0x301;
+enum NT_S390_TODCMP =  0x302;
+enum NT_S390_TODPREG = 0x303;
+enum NT_S390_CTRS =    0x304;
+enum NT_S390_PREFIX =  0x305;
+enum NT_S390_LAST_BREAK =      0x306;
+enum NT_S390_SYSTEM_CALL =     0x307;
+enum NT_S390_TDB =     0x308;
+enum NT_ARM_VFP =      0x400;
+enum NT_ARM_TLS =      0x401;
+enum NT_ARM_HW_BREAK = 0x402;
+enum NT_ARM_HW_WATCH = 0x403;
+
+enum NT_VERSION =      1;
+
+struct Elf32_Dyn
+{
+    Elf32_Sword   d_tag;
+    union _d_un
+    {
+        Elf32_Word d_val;
+        Elf32_Addr d_ptr;
+    } _d_un d_un;
+}
+
+struct Elf64_Dyn
+{
+    Elf64_Sxword  d_tag;
+    union _d_un
+    {
+        Elf64_Xword d_val;
+        Elf64_Addr d_ptr;
+    } _d_un d_un;
+}
+
+enum NT_GNU_ABI_TAG =      1;
+enum NT_GNU_HWCAP =        2;
+enum NT_GNU_BUILD_ID =     3;
+enum NT_GNU_GOLD_VERSION = 4;
+
+struct Elf32_auxv_t
+{
+    uint32_t a_type;
+    union _a_un
+    {
+        uint32_t a_val;
+    } _a_un a_un;
+}
+
+struct Elf64_auxv_t
+{
+    uint64_t a_type;
+    union _a_un
+    {
+        uint64_t a_val;
+    } _a_un a_un;
+}
+
+enum AT_NULL =         0;
+enum AT_IGNORE =       1;
+enum AT_EXECFD =       2;
+enum AT_PHDR =         3;
+enum AT_PHENT =        4;
+enum AT_PHNUM =        5;
+enum AT_PAGESZ =       6;
+enum AT_BASE =         7;
+enum AT_FLAGS =        8;
+enum AT_ENTRY =        9;
+enum AT_NOTELF =       10;
+enum AT_UID =          11;
+enum AT_EUID =         12;
+enum AT_GID =          13;
+enum AT_EGID =         14;
+enum AT_CLKTCK =       17;
+enum AT_PLATFORM =     15;
+enum AT_HWCAP =        16;
+enum AT_FPUCW =        18;
+enum AT_DCACHEBSIZE =  19;
+enum AT_ICACHEBSIZE =  20;
+enum AT_UCACHEBSIZE =  21;
+enum AT_IGNOREPPC =    22;
+
+enum AT_SECURE =       23;
+
+enum AT_BASE_PLATFORM = 24;
+
+enum AT_RANDOM =       25;
+
+enum AT_HWCAP2 =       26;
+
+enum AT_EXECFN =       31;
+enum AT_SYSINFO =      32;
+enum AT_SYSINFO_EHDR = 33;
+
+enum AT_L1I_CACHESHAPE =       34;
+enum AT_L1D_CACHESHAPE =       35;
+enum AT_L2_CACHESHAPE =        36;
+enum AT_L3_CACHESHAPE =        37;
diff --git a/druntime/src/core/sys/hurd/errno.d b/druntime/src/core/sys/hurd/errno.d
new file mode 100644
index 000000000000..db9c83c9010d
--- /dev/null
+++ b/druntime/src/core/sys/hurd/errno.d
@@ -0,0 +1,21 @@
+/**
+ * D header file for GNU/Hurd
+ *
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ * $(LINK2 http://sourceware.org/git/?p=glibc.git;a=blob;f=stdlib/errno.h, glibc stdlib/errno.h)
+ */
+module core.sys.hurd.errno;
+
+version (Hurd):
+extern (C):
+nothrow:
+
+public import core.stdc.errno;
+import core.sys.hurd.config;
+
+static if (_GNU_SOURCE)
+{
+    extern __gshared char* program_invocation_name, program_invocation_short_name;
+    alias error_t = int;
+}
diff --git a/druntime/src/core/sys/hurd/execinfo.d b/druntime/src/core/sys/hurd/execinfo.d
new file mode 100644
index 000000000000..4afeffa8ff58
--- /dev/null
+++ b/druntime/src/core/sys/hurd/execinfo.d
@@ -0,0 +1,16 @@
+/**
+ * D header file for GNU/Hurd.
+ *
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ */
+module core.sys.hurd.execinfo;
+
+version (Hurd):
+extern (C):
+nothrow:
+@nogc:
+
+int backtrace(void** buffer, int size);
+char** backtrace_symbols(const(void*)* buffer, int size);
+void backtrace_symbols_fd(const(void*)* buffer, int size, int fd);
diff --git a/druntime/src/core/sys/hurd/link.d b/druntime/src/core/sys/hurd/link.d
new file mode 100644
index 000000000000..7089cb9075eb
--- /dev/null
+++ b/druntime/src/core/sys/hurd/link.d
@@ -0,0 +1,134 @@
+/**
+ * D header file for GNU/Hurd.
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ *
+ * $(LINK2 http://sourceware.org/git/?p=glibc.git;a=blob;f=elf/link.h, glibc elf/link.h)
+ */
+module core.sys.hurd.link;
+
+version (Hurd):
+extern (C):
+nothrow:
+@system:
+
+version (X86)     version = X86_Any;
+version (X86_64)  version = X86_Any;
+
+import core.stdc.stdint : uintptr_t, uint32_t, uint64_t;
+import core.sys.hurd.config : __WORDSIZE;
+import core.sys.hurd.dlfcn : Lmid_t;
+import core.sys.hurd.elf;
+
+version (X86_Any)
+{
+    // http://sourceware.org/git/?p=glibc.git;a=blob;f=bits/elfclass.h
+    alias __ELF_NATIVE_CLASS = __WORDSIZE;
+    alias Elf_Symndx = uint32_t;
+}
+else
+    static assert(0, "unimplemented");
+// <bits/elfclass.h>
+
+template ElfW(string type)
+{
+    mixin("alias ElfW = Elf"~__ELF_NATIVE_CLASS.stringof~"_"~type~";");
+}
+
+enum
+{
+    RT_CONSISTENT,
+    RT_ADD,
+    RT_DELETE,
+}
+
+struct r_debug
+{
+    int r_version;
+    link_map* r_map;
+    ElfW!"Addr" r_brk;
+    typeof(RT_CONSISTENT) r_state;
+    ElfW!"Addr" r_ldbase;
+}
+
+extern r_debug _r_debug;
+extern ElfW!"Dyn"* _DYNAMIC;
+
+struct link_map
+{
+    ElfW!"Addr" l_addr;
+    char* l_name;
+    ElfW!"Dyn"* l_ld;
+    link_map* l_next, l_prev;
+}
+
+enum
+{
+    LA_ACT_CONSISTENT,
+    LA_ACT_ADD,
+    LA_ACT_DELETE,
+}
+
+enum
+{
+    LA_SER_ORIG = 0x01,
+    LA_SER_LIBPATH = 0x02,
+    LA_SER_RUNPATH = 0x04,
+    LA_SER_CONFIG = 0x08,
+    LA_SER_DEFAULT = 0x40,
+    LA_SER_SECURE = 0x80,
+}
+
+
+enum
+{
+    LA_FLG_BINDTO = 0x01,
+    LA_FLG_BINDFROM = 0x02,
+}
+
+
+enum
+{
+    LA_SYMB_NOPLTENTER = 0x01,
+    LA_SYMB_NOPLTEXIT = 0x02,
+    LA_SYMB_STRUCTCALL = 0x04,
+    LA_SYMB_DLSYM = 0x08,
+    LA_SYMB_ALTVALUE = 0x10,
+}
+
+struct dl_phdr_info
+{
+    ElfW!"Addr" dlpi_addr;
+    const(char)* dlpi_name;
+    const(ElfW!"Phdr")* dlpi_phdr;
+    ElfW!"Half" dlpi_phnum;
+
+    // check the SIZE argument of the dl_iterate_phdr callback whether
+    // the following members are available
+    ulong dlpi_adds;
+    ulong dlpi_subs;
+
+    size_t dlpi_tls_modid;
+    void *dlpi_tls_data;
+}
+
+private alias dl_iterate_phdr_cb = extern(C) int function(dl_phdr_info*, size_t, void *);
+private alias dl_iterate_phdr_cb_ngc = extern(C) int function(dl_phdr_info*, size_t, void *) @nogc;
+extern int dl_iterate_phdr(dl_iterate_phdr_cb __callback, void*__data);
+extern int dl_iterate_phdr(dl_iterate_phdr_cb_ngc __callback, void*__data) @nogc;
+
+// ld.so auditing interfaces prototypes have to be defined by the auditing DSO.
+extern uint la_version(uint __version);
+extern void la_activity(uintptr_t *__cookie, uint __flag);
+extern char* la_objsearch(const(char)* __name, uintptr_t* __cookie,
+                          uint __flag);
+extern uint la_objopen(link_map* __map, Lmid_t __lmid,
+                       uintptr_t* __cookie);
+extern void la_preinit(uintptr_t* __cookie);
+extern uintptr_t la_symbind32(Elf32_Sym* __sym, uint __ndx,
+                              uintptr_t* __refcook, uintptr_t* __defcook,
+                              uint *__flags, const(char)* __symname);
+extern uintptr_t la_symbind64(Elf64_Sym* __sym, uint __ndx,
+                              uintptr_t* __refcook, uintptr_t* __defcook,
+                              uint* __flags, const(char)* __symname);
+extern uint la_objclose(uintptr_t *__cookie);
diff --git a/druntime/src/core/sys/hurd/sys/types.d b/druntime/src/core/sys/hurd/sys/types.d
new file mode 100644
index 000000000000..96e46040ff12
--- /dev/null
+++ b/druntime/src/core/sys/hurd/sys/types.d
@@ -0,0 +1,22 @@
+/**
+ * D header file for Hurd extensions to POSIX's sys/types.h.
+ *
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ */
+
+module core.sys.hurd.sys.types;
+
+import core.sys.posix.config;
+
+version (Hurd):
+extern(C):
+@nogc:
+nothrow:
+
+static if (__WORDSIZE == 32)
+    alias ipc_pid_t = ushort;
+else
+    alias ipc_pid_t = int;
+
+alias fsid_t = ulong;
diff --git a/druntime/src/core/sys/hurd/time.d b/druntime/src/core/sys/hurd/time.d
new file mode 100644
index 000000000000..12031e599c44
--- /dev/null
+++ b/druntime/src/core/sys/hurd/time.d
@@ -0,0 +1,15 @@
+/**
+ * D header file for Hurd extensions to POSIX's time.h.
+ *
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ */
+module core.sys.hurd.time;
+
+public import core.sys.posix.time;
+
+version (Hurd):
+
+enum CLOCK_MONOTONIC_RAW      = 4;
+enum CLOCK_REALTIME_COARSE    = 5;
+enum CLOCK_MONOTONIC_COARSE   = 6;
diff --git a/druntime/src/core/sys/hurd/unistd.d b/druntime/src/core/sys/hurd/unistd.d
new file mode 100644
index 000000000000..a351134cd426
--- /dev/null
+++ b/druntime/src/core/sys/hurd/unistd.d
@@ -0,0 +1,30 @@
+/**
+ * D header file for GNU/Hurd.
+ *
+ * Copyright: Copyright (c) 2026 D Language Foundation
+ * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ */
+module core.sys.hurd.unistd;
+
+public import core.sys.posix.unistd;
+
+version (Hurd):
+extern(C):
+nothrow:
+@nogc:
+
+
+// Additional seek constants for sparse file handling
+// from Hurds's unistd.h, stdio.h
+enum {
+    /// Offset is relative to the next location containing data
+    SEEK_DATA = 3,
+    /// Offset is relative to the next hole (or EOF if file is not sparse)
+    SEEK_HOLE = 4
+}
+
+/// Prompt for a password without echoing it.
+char* getpass(const(char)* prompt);
+
+/// Close all open file descriptors greater or equal to `lowfd`
+void closefrom(int lowfd);
diff --git a/druntime/src/core/sys/posix/dirent.d b/druntime/src/core/sys/posix/dirent.d
index c77d6da22b20..24274ba98dd7 100644
--- a/druntime/src/core/sys/posix/dirent.d
+++ b/druntime/src/core/sys/posix/dirent.d
@@ -158,6 +158,17 @@ else version (Solaris)
         char[1] d_name = 0;
     }
 }
+else version (Hurd)
+{
+    struct dirent
+    {
+        ino_t       d_ino;
+        ushort      d_reclen;
+        ubyte       d_type;
+        ubyte       d_namlen;
+        char[1]     d_name = 0;
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/fcntl.d b/druntime/src/core/sys/posix/fcntl.d
index f64e234cedfc..79c6043400a7 100644
--- a/druntime/src/core/sys/posix/fcntl.d
+++ b/druntime/src/core/sys/posix/fcntl.d
@@ -870,6 +870,113 @@ else version (Solaris)
     enum AT_REMOVEDIR        = 0x1;
     enum AT_EACCESS          = 0x4;
 }
+else version (Hurd)
+{
+    enum F_DUPFD        = 0;
+    enum F_GETFD        = 1;
+    enum F_SETFD        = 2;
+    enum F_GETFL        = 3;
+    enum F_SETFL        = 4;
+    enum F_GETOWN       = 5;
+    enum F_SETOWN       = 6;
+
+    static if ( __USE_FILE_OFFSET64 )
+    {
+        enum F_GETLK      = F_GETLK64;
+        enum F_SETLK      = F_SETLK64;
+        enum F_SETLKW     = F_SETLKW64;
+    }
+    else
+    {
+        enum F_GETLK      = 7;
+        enum F_SETLK      = 8;
+        enum F_SETLKW     = 9;
+    }
+    enum F_GETLK64        = 10;
+    enum F_SETLK64        = 11;
+    enum F_SETLKW64       = 12;
+
+    enum F_DUPFD_CLOEXEC = 1030;
+
+    enum FD_CLOEXEC     = 1;
+
+    enum F_RDLCK        = 1;
+    enum F_WRLCK        = 2;
+    enum F_UNLCK        = 3;
+
+    enum O_CREAT        = 0x0010;
+    enum O_EXCL         = 0x0020;
+    enum O_NOCTTY       = 0;
+    enum O_TRUNC        = 0x00010000;
+
+    enum O_APPEND       = 0x0100;
+    enum O_DSYNC        = O_SYNC;
+    enum O_NONBLOCK     = 0x0004;
+    enum O_RSYNC        = O_SYNC;
+
+
+    enum O_ACCMODE      = O_RDWR;
+    enum O_RDONLY       = 0x0001;
+    enum O_WRONLY       = 0x0002;
+    enum O_RDWR         = (O_RDONLY|O_WRONLY);
+
+    enum O_SYNC         = O_FSYNC;
+    enum O_FSYNC        = 0x0400;
+
+    enum O_READ         = O_RDONLY;
+    enum O_WRITE        = O_WRONLY;
+    enum O_EXEC         = 0x0004;
+    enum O_NORW         = 0;
+    enum O_LARGEFILE    = 0;
+    enum O_NOLINK       = 0x0040;
+    enum O_NOTRANS      = 0x0080;
+    enum O_NOFOLLOW     = 0x00100000;
+    enum O_DIRECTORY    = 0x00200000;
+    enum O_ASYNC        = 0x0200;
+    enum O_NOATIME      = 0x0800;
+    enum O_SHLOCK       = 0x00020000;
+    enum O_EXLOCK       = 0x00040000;
+    enum O_NDELAY       = O_NONBLOCK;
+    enum O_HURD         = (0xffff | O_EXLOCK | O_SHLOCK);
+    enum O_CLOEXEC      = 0x00400000;
+    enum O_TMPFILE      = 0x00800000;
+    enum O_IGNORE_CTTY  = 0x00080000;
+
+
+    version (X86)
+    {
+        struct flock
+        {
+            int     l_type;
+            int     l_whence;
+            off_t   l_start;
+            off_t   l_len;
+            pid_t   l_pid;
+        }
+    }
+    else version (X86_64)
+    {
+        struct flock
+        {
+            short   l_type;
+            short   l_whence;
+            off_t   l_start;
+            off_t   l_len;
+            pid_t   l_pid;
+        }
+    }
+    else
+    {
+        static assert(false, "Unsupported platform");
+    }
+
+    enum AT_FDCWD            = -100;
+
+    enum AT_EACCESS          = 0x200;
+    enum AT_SYMLINK_NOFOLLOW = 0x100;
+    enum AT_SYMLINK_FOLLOW   = 0x400;
+    enum AT_REMOVEDIR        = 0x200;
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/netinet/in_.d b/druntime/src/core/sys/posix/netinet/in_.d
index 75359ea213a7..fc25ed5b4a9f 100644
--- a/druntime/src/core/sys/posix/netinet/in_.d
+++ b/druntime/src/core/sys/posix/netinet/in_.d
@@ -85,18 +85,31 @@ version (CRuntime_Glibc)
     //{
     //    in_addr_t s_addr;
     //}
+    version (linux)
+    {
+        private enum __SOCK_SIZE__ = 16;
 
-    private enum __SOCK_SIZE__ = 16;
+        struct sockaddr_in
+        {
+            sa_family_t sin_family;
+            in_port_t   sin_port;
+            in_addr     sin_addr;
 
-    struct sockaddr_in
+            /* Pad to size of `struct sockaddr'. */
+            ubyte[__SOCK_SIZE__ - sa_family_t.sizeof -
+                  in_port_t.sizeof - in_addr.sizeof] __pad;
+        }
+    }
+    else version (Hurd)
     {
-        sa_family_t sin_family;
-        in_port_t   sin_port;
-        in_addr     sin_addr;
-
-        /* Pad to size of `struct sockaddr'. */
-        ubyte[__SOCK_SIZE__ - sa_family_t.sizeof -
-              in_port_t.sizeof - in_addr.sizeof] __pad;
+        struct sockaddr_in
+        {
+            ubyte       sin_len;
+            sa_family_t sin_family;
+            in_port_t   sin_port;
+            in_addr     sin_addr;
+            ubyte[8]    sin_zero;
+        }
     }
 
     enum
@@ -513,13 +526,28 @@ version (CRuntime_Glibc)
         }
     }
 
-    struct sockaddr_in6
+    version (linux)
     {
-        sa_family_t sin6_family;
-        in_port_t   sin6_port;
-        uint32_t    sin6_flowinfo;
-        in6_addr    sin6_addr;
-        uint32_t    sin6_scope_id;
+        struct sockaddr_in6
+        {
+            ushort      sin6_family;
+            uint16_t    sin6_port;
+            uint32_t    sin6_flowinfo;
+            in6_addr    sin6_addr;
+            uint32_t    sin6_scope_id;
+        }
+    }
+    else version (Hurd)
+    {
+        struct sockaddr_in6
+        {
+            uint8_t     sin6_len;
+            sa_family_t sin6_family;
+            uint16_t    sin6_port;
+            uint32_t    sin6_flowinfo;
+            in6_addr    sin6_addr;
+            uint32_t    sin6_scope_id;
+        }
     }
 
     extern __gshared immutable in6_addr in6addr_any;
diff --git a/druntime/src/core/sys/posix/poll.d b/druntime/src/core/sys/posix/poll.d
index 4a320d158d15..e8084a2a7048 100644
--- a/druntime/src/core/sys/posix/poll.d
+++ b/druntime/src/core/sys/posix/poll.d
@@ -338,6 +338,22 @@ else version (Solaris)
         POLLNVAL    = 0x0020,
     }
 }
+else version (Hurd)
+{
+    enum
+    {
+        POLLIN      = 0x001,
+        POLLRDNORM  = POLLIN,
+        POLLRDBAND  = POLLPRI,
+        POLLPRI     = 0x002,
+        POLLOUT     = 0x004,
+        POLLWRNORM  = POLLOUT,
+        POLLWRBAND  = POLLOUT,
+        POLLERR     = 0x008,  /* ocatal 010 */
+        POLLHUP     = 0x010,  /* ocatal 020 */
+        POLLNVAL    = 0x020,  /* ocatal 040 */
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/pthread.d b/druntime/src/core/sys/posix/pthread.d
index 33c442df08f4..9064e1e615a5 100644
--- a/druntime/src/core/sys/posix/pthread.d
+++ b/druntime/src/core/sys/posix/pthread.d
@@ -104,41 +104,83 @@ void pthread_testcancel();
 */
 version (CRuntime_Glibc)
 {
-    enum
+    version (linux)
     {
-        PTHREAD_CANCEL_ENABLE,
-        PTHREAD_CANCEL_DISABLE
-    }
+        enum
+        {
+            PTHREAD_CANCEL_ENABLE,
+            PTHREAD_CANCEL_DISABLE
+        }
 
-    enum
-    {
-        PTHREAD_CANCEL_DEFERRED,
-        PTHREAD_CANCEL_ASYNCHRONOUS
-    }
+        enum
+        {
+            PTHREAD_CANCEL_DEFERRED,
+            PTHREAD_CANCEL_ASYNCHRONOUS
+        }
 
-    enum PTHREAD_CANCELED = cast(void*) -1;
+        enum PTHREAD_CANCELED = cast(void*) -1;
 
-    //enum pthread_mutex_t PTHREAD_COND_INITIALIZER = { __LOCK_ALT_INITIALIZER, 0, "", 0 };
+        //enum pthread_mutex_t PTHREAD_COND_INITIALIZER = { __LOCK_ALT_INITIALIZER, 0, "", 0 };
 
-    enum
-    {
-        PTHREAD_CREATE_JOINABLE,
-        PTHREAD_CREATE_DETACHED
-    }
+        enum
+        {
+            PTHREAD_CREATE_JOINABLE,
+            PTHREAD_CREATE_DETACHED
+        }
 
-    enum
-    {
-        PTHREAD_INHERIT_SCHED,
-        PTHREAD_EXPLICIT_SCHED
-    }
+        enum
+        {
+            PTHREAD_INHERIT_SCHED,
+            PTHREAD_EXPLICIT_SCHED
+        }
 
-    enum PTHREAD_MUTEX_INITIALIZER  = pthread_mutex_t.init;
-    enum PTHREAD_ONCE_INIT          = pthread_once_t.init;
+        enum PTHREAD_MUTEX_INITIALIZER  = pthread_mutex_t.init;
+        enum PTHREAD_ONCE_INIT          = pthread_once_t.init;
 
-    enum
+        enum
+        {
+            PTHREAD_PROCESS_PRIVATE,
+            PTHREAD_PROCESS_SHARED
+        }
+    }
+    else version (Hurd)
     {
-        PTHREAD_PROCESS_PRIVATE,
-        PTHREAD_PROCESS_SHARED
+        enum
+        {
+            PTHREAD_CANCEL_DISABLE,
+            PTHREAD_CANCEL_ENABLE,
+        }
+
+        enum
+        {
+            PTHREAD_CANCEL_DEFERRED,
+            PTHREAD_CANCEL_ASYNCHRONOUS
+        }
+
+        enum PTHREAD_CANCELED = cast(void*) -1;
+
+        // enum __pthread_cond PTHREAD_COND_INITIALIZER = { __PTHREAD_SPIN_LOCK_INITIALIZER, NULL, NULL, 0, NULL }
+
+        enum
+        {
+            PTHREAD_CREATE_JOINABLE = 0,
+            PTHREAD_CREATE_DETACHED,
+        }
+
+        enum
+        {
+            PTHREAD_EXPLICIT_SCHED = 0,
+            PTHREAD_INHERIT_SCHED ,
+        }
+
+        enum PTHREAD_MUTEX_INITIALIZER  = pthread_mutex_t.init;
+        enum PTHREAD_ONCE_INIT          = pthread_once_t.init;
+
+        enum
+        {
+            PTHREAD_PROCESS_PRIVATE = 0,
+            PTHREAD_PROCESS_SHARED,
+        }
     }
 }
 else version (Darwin)
@@ -477,32 +519,70 @@ alias _pthread_cleanup_routine = void function(void*);
 alias _pthread_cleanup_routine_nogc = void function(void*) @nogc;
 version (CRuntime_Glibc)
 {
-    struct _pthread_cleanup_buffer
+    version (linux)
     {
-        _pthread_cleanup_routine    __routine;
-        void*                       __arg;
-        int                         __canceltype;
-        _pthread_cleanup_buffer*    __prev;
-    }
+        struct _pthread_cleanup_buffer
+        {
+            _pthread_cleanup_routine    __routine;
+            void*                       __arg;
+            int                         __canceltype;
+            _pthread_cleanup_buffer*    __prev;
+        }
 
-    void _pthread_cleanup_push(_pthread_cleanup_buffer*, _pthread_cleanup_routine, void*);
-    void _pthread_cleanup_push(_pthread_cleanup_buffer*, _pthread_cleanup_routine_nogc, void*) @nogc;
-    void _pthread_cleanup_pop(_pthread_cleanup_buffer*, int);
+        void _pthread_cleanup_push(_pthread_cleanup_buffer*, _pthread_cleanup_routine, void*);
+        void _pthread_cleanup_push(_pthread_cleanup_buffer*, _pthread_cleanup_routine_nogc, void*) @nogc;
+        void _pthread_cleanup_pop(_pthread_cleanup_buffer*, int);
 
-    struct pthread_cleanup
-    {
-        _pthread_cleanup_buffer buffer = void;
+        struct pthread_cleanup
+        {
+            _pthread_cleanup_buffer buffer = void;
 
-        extern (D) void push(F: _pthread_cleanup_routine)(F routine, void* arg )
+            extern (D) void push(F: _pthread_cleanup_routine)(F routine, void* arg )
+            {
+                _pthread_cleanup_push( &buffer, routine, arg );
+            }
+
+            extern (D) void pop()( int execute )
+            {
+                _pthread_cleanup_pop( &buffer, execute );
+            }
+        }
+    }
+    else version (Hurd)
+    {
+        struct __pthread_cancelation_handler
         {
-            _pthread_cleanup_push( &buffer, routine, arg );
+          _pthread_cleanup_routine       __handler;
+            void*                          __arg;
+            __pthread_cancelation_handler* __next;
         }
 
-        extern (D) void pop()( int execute )
+        private __pthread_cancelation_handler** __pthread_get_cleanup_stack();
+
+        struct pthread_cleanup
         {
-            _pthread_cleanup_pop( &buffer, execute );
+            __pthread_cancelation_handler** handlers = void;
+            __pthread_cancelation_handler handler = void;
+
+            extern (D) void push(F: _pthread_cleanup_routine)(F routine, void* arg)
+            {
+                handlers = __pthread_get_cleanup_stack();
+                handler = __pthread_cancelation_handler(routine, arg, *handlers);
+                *handlers = &handler;
+            }
+            extern (D) void pop()(int execute)
+            {
+                if (execute)
+                    handler.__handler(handler.__arg);
+                *handlers = handler.__next;
+            }
         }
     }
+    else
+    {
+        static assert(false, "Unsupported platform");
+    }
+
 }
 else version (Darwin)
 {
@@ -1064,9 +1144,24 @@ int pthread_setconcurrency(int);
 
 version (CRuntime_Glibc)
 {
-    enum PTHREAD_MUTEX_NORMAL       = 0;
-    enum PTHREAD_MUTEX_RECURSIVE    = 1;
-    enum PTHREAD_MUTEX_ERRORCHECK   = 2;
+
+    version(linux)
+    {
+        enum PTHREAD_MUTEX_NORMAL       = 0;
+        enum PTHREAD_MUTEX_RECURSIVE    = 1;
+        enum PTHREAD_MUTEX_ERRORCHECK   = 2;
+    }
+    else version(Hurd)
+    {
+        enum PTHREAD_MUTEX_NORMAL       = 0;
+        enum PTHREAD_MUTEX_ERRORCHECK   = 1;
+        enum PTHREAD_MUTEX_RECURSIVE    = 2;
+
+    }
+    else
+    {
+        static assert(false, "Unsupported platform");
+    }
     enum PTHREAD_MUTEX_DEFAULT      = PTHREAD_MUTEX_NORMAL;
 
     int pthread_attr_getguardsize(const scope pthread_attr_t*, size_t*);
@@ -1400,6 +1495,22 @@ else version (Solaris)
     int pthread_mutexattr_setprioceiling(pthread_mutexattr_t*, int);
     int pthread_mutexattr_setprotocol(pthread_mutexattr_t*, int);
 }
+else version (Hurd)
+{
+  enum
+  {
+      PTHREAD_PRIO_NONE = 0,
+      PTHREAD_PRIO_INHERIT,
+      PTHREAD_PRIO_PROTECT,
+  }
+
+  int pthread_mutex_getprioceiling(const scope pthread_mutex_t*, int*);
+  int pthread_mutex_setprioceiling(pthread_mutex_t*, int, int*);
+  int pthread_mutexattr_getprioceiling(const scope pthread_mutexattr_t*, int*);
+  int pthread_mutexattr_getprotocol(const scope pthread_mutexattr_t*, int*);
+  int pthread_mutexattr_setprioceiling(pthread_mutexattr_t*, int);
+  int pthread_mutexattr_setprotocol(pthread_mutexattr_t*, int);
+}
 
 //
 // Scheduling (TPS)
@@ -1421,10 +1532,21 @@ int pthread_setschedprio(pthread_t, int);
 
 version (CRuntime_Glibc)
 {
-    enum
+    version (linux)
     {
-        PTHREAD_SCOPE_SYSTEM,
-        PTHREAD_SCOPE_PROCESS
+        enum
+        {
+            PTHREAD_SCOPE_SYSTEM,
+            PTHREAD_SCOPE_PROCESS
+        }
+    }
+    else version (Hurd)
+    {
+        enum
+        {
+            PTHREAD_SCOPE_SYSTEM = 0,
+            PTHREAD_SCOPE_PROCESS,
+        }
     }
 
     int pthread_attr_getinheritsched(const scope pthread_attr_t*, int*);
diff --git a/druntime/src/core/sys/posix/sched.d b/druntime/src/core/sys/posix/sched.d
index 273be5e81919..d8a1bfe0e4bb 100644
--- a/druntime/src/core/sys/posix/sched.d
+++ b/druntime/src/core/sys/posix/sched.d
@@ -169,6 +169,17 @@ else version (Solaris)
     enum SCHED_FX = 6;
     enum _SCHED_NEXT = 7;
 }
+else version (Hurd)
+{
+    struct sched_param
+    {
+        int sched_priority;
+    }
+
+    enum SCHED_FIFO     = 1;
+    enum SCHED_OTHER    = 0;
+    enum SCHED_RR       = 2;
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/semaphore.d b/druntime/src/core/sys/posix/semaphore.d
index dc9c14fd96b5..8a8b2321b9c1 100644
--- a/druntime/src/core/sys/posix/semaphore.d
+++ b/druntime/src/core/sys/posix/semaphore.d
@@ -51,19 +51,31 @@ int sem_wait(sem_t*);
 
 version (CRuntime_Glibc)
 {
-    private alias __atomic_lock_t = int;
-
-    private struct _pthread_fastlock
+    version(linux)
     {
-      c_long            __status;
-      __atomic_lock_t   __spinlock;
-    }
+        private alias __atomic_lock_t = int;
 
-    struct sem_t
+        private struct _pthread_fastlock
+        {
+            c_long            __status;
+            __atomic_lock_t   __spinlock;
+        }
+
+        struct sem_t
+        {
+            _pthread_fastlock __sem_lock;
+            int               __sem_value;
+            void*             __sem_waiting;
+        }
+    }
+    else version (Hurd)
     {
-      _pthread_fastlock __sem_lock;
-      int               __sem_value;
-      void*             __sem_waiting;
+        private enum __SIZEOF_SEM_T = 20;
+        union sem_t
+        {
+            byte[__SIZEOF_SEM_T] __size;
+            c_long __align;
+        }
     }
 
     enum SEM_FAILED = cast(sem_t*) null;
diff --git a/druntime/src/core/sys/posix/signal.d b/druntime/src/core/sys/posix/signal.d
index 94ddd0403da8..ef0c28801a5c 100644
--- a/druntime/src/core/sys/posix/signal.d
+++ b/druntime/src/core/sys/posix/signal.d
@@ -168,6 +168,9 @@ else version (NetBSD)
     enum SIGRTMIN = 33;
     enum SIGRTMAX = 63;
 }
+else version (Hurd)
+{
+}
 else version (linux)
 {
     // Note: CRuntime_Bionic switched to calling these functions
@@ -561,6 +564,24 @@ else version (Solaris)
     enum SIGUSR2 = 17;
     enum SIGURG = 21;
 }
+else version (Hurd)
+{
+    enum SIGALRM = 14;
+    enum SIGBUS = 10;
+    enum SIGCHLD = 20;
+    enum SIGCONT = 19;
+    enum SIGHUP = 1;
+    enum SIGKILL = 9;
+    enum SIGPIPE = 13;
+    enum SIGQUIT = 3;
+    enum SIGSTOP = 17;
+    enum SIGTSTP = 18;
+    enum SIGTTIN = 21;
+    enum SIGTTOU = 22;
+    enum SIGUSR1 = 30;
+    enum SIGUSR2 = 31;
+    enum SIGURG = 16;
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -848,6 +869,26 @@ else version (Darwin)
         int             sa_flags;
     }
 }
+else version (Hurd)
+{
+  struct sigaction_t
+  {
+      static if ( true /* __USE_POSIX199309 */ )
+      {
+          union
+          {
+              sigfn_t     sa_handler;
+              sigactfn_t  sa_sigaction;
+          }
+      }
+      else
+      {
+          sigfn_t     sa_handler;
+      }
+      sigset_t        sa_mask;
+      int             sa_flags;
+  }
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -1417,6 +1458,41 @@ else version (Solaris)
     enum SI_ASYNCIO = -4;
     enum SI_MESGQ   = -5;
 }
+else version(Hurd)
+{
+    enum SIG_HOLD = cast(sigfn_t2) 2;
+
+    alias sigset_t = c_ulong;
+
+    enum SA_NOCLDSTOP   = 0x0008; // (CX|XSI)
+
+    enum SIG_BLOCK      = 1;
+    enum SIG_UNBLOCK    = 2;
+    enum SIG_SETMASK    = 3;
+
+    struct siginfo_t
+    {
+        int si_signo;
+        int si_errno;
+        int si_code;
+
+        pid_t si_pid;
+        uid_t si_uid;
+        void* si_addr;
+        int si_status;
+        c_long si_band;
+        sigval  si_value;
+    }
+
+    enum
+    {
+        SI_ASYNCIO = -4,
+        SI_MESGQ,
+        SI_TIMER,
+        SI_QUEUE,
+        SI_USER
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -2375,6 +2451,89 @@ else version (Solaris)
         POLL_HUP,
     }
 }
+else version(Hurd)
+{
+    enum SIGPOLL = 23;
+    enum SIGPROF = 27;
+    enum SIGSYS = 12;
+    enum SIGTRAP = 5;
+    enum SIGVTALRM = 26;
+    enum SIGXCPU = 24;
+    enum SIGXFSZ = 25;
+
+    enum
+    {
+        SA_ONSTACK = 0x0001,
+        SA_RESETHAND = 0x0004,
+        SA_RESTART = 0x0002,
+        SA_SIGINFO = 0x0040,
+        // SA_NOCLDWAIT = ,
+        SA_NODEFER = 0x00010,
+    }
+
+    enum
+    {
+        ILL_ILLOPC = 1,
+        ILL_ILLOPN,
+        ILL_ILLADR,
+        ILL_ILLTRP,
+        ILL_PRVOPC,
+        ILL_PRVREG,
+        ILL_COPROC,
+        ILL_BADSTK
+    }
+
+    enum
+    {
+        FPE_INTDIV = 1,
+        FPE_INTOVF,
+        FPE_FLTDIV,
+        FPE_FLTOVF,
+        FPE_FLTUND,
+        FPE_FLTRES,
+        FPE_FLTINV,
+        FPE_FLTSUB
+    }
+
+    enum
+    {
+        SEGV_MAPERR = 1,
+        SEGV_ACCERR
+    }
+
+    enum
+    {
+        BUS_ADRALN = 1,
+        BUS_ADRERR,
+        BUS_OBJERR
+    }
+
+    enum
+    {
+        TRAP_BRKPT = 1,
+        TRAP_TRACE
+    }
+
+    enum
+    {
+        CLD_EXITED = 1,
+        CLD_KILLED,
+        CLD_DUMPED,
+        CLD_TRAPPED,
+        CLD_STOPPED,
+        CLD_CONTINUED
+    }
+
+    enum
+    {
+        POLL_IN = 1,
+        POLL_OUT,
+        POLL_MSG,
+        POLL_ERR,
+        POLL_PRI,
+        POLL_HUP
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -2416,11 +2575,21 @@ int sigrelse(int);
 
 version (CRuntime_Glibc)
 {
-    enum SS_ONSTACK     = 1;
-    enum SS_DISABLE     = 2;
-    enum MINSIGSTKSZ    = 2048;
-    enum SIGSTKSZ       = 8192;
+    version (linux)
+    {
+        enum SS_ONSTACK     = 1;
+        enum SS_DISABLE     = 2;
+        enum MINSIGSTKSZ    = 2048;
+        enum SIGSTKSZ       = 8192;
+    }
 
+    version (Hurd)
+    {
+        enum SS_ONSTACK     = 0x0001;
+        enum SS_DISABLE     = 0x0004;
+        enum MINSIGSTKSZ    = 8192;
+        enum SIGSTKSZ       = (MINSIGSTKSZ + 32768);
+    }
     //ucontext_t (defined in core.sys.posix.ucontext)
     //mcontext_t (defined in core.sys.posix.ucontext)
 
@@ -2990,6 +3159,18 @@ else version (Solaris)
         int __sigev_pad2;
     }
 }
+else version (Hurd)
+{
+    struct sigevent
+    {
+      sigval      sigev_value;
+      int         sigev_signo;
+      int         sigev_notify;
+
+      void function(sigval) sigev_notify_function;
+      void*                 sigev_notify_attributes;
+  }
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/spawn.d b/druntime/src/core/sys/posix/spawn.d
index 081270b42c53..ece7ff7e257d 100644
--- a/druntime/src/core/sys/posix/spawn.d
+++ b/druntime/src/core/sys/posix/spawn.d
@@ -34,6 +34,8 @@ OpenBSD: https://github.com/openbsd/src/blob/master/include/spawn.h
 DragonFlyBSD: https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/include/spawn.h
 
 Solaris: https://github.com/illumos/illumos-gate/blob/master/usr/src/head/spawn.h
+
+Hurd: https://sourceware.org/git/?p=glibc.git;a=blob;f=posix/spawn.h;hb=HEAD
 */
 
 version (OSX) // macOS and iOS only as this API is prohibited on WatchOS and TVOS
@@ -370,5 +372,45 @@ else version (Solaris)
         int posix_spawnattr_setsigignore_np(posix_spawnattr_t* attr, const sigset_t* sigignore);
     }
 }
+else version (Hurd)
+{
+    // Source: https://sourceware.org/git/?p=glibc.git;a=blob;f=posix/spawn.h;hb=HEAD
+    enum
+    {
+        POSIX_SPAWN_RESETIDS = 0x01,
+        POSIX_SPAWN_SETPGROUP = 0x02,
+        POSIX_SPAWN_SETSIGDEF = 0x04,
+        POSIX_SPAWN_SETSIGMASK = 0x08,
+        POSIX_SPAWN_SETSCHEDPARAM = 0x10,
+        POSIX_SPAWN_SETSCHEDULER = 0x20,
+    }
+    import core.sys.posix.config : _GNU_SOURCE;
+    static if (_GNU_SOURCE)
+    {
+        enum
+        {
+            POSIX_SPAWN_USEVFORK = 0x40,
+            POSIX_SPAWN_SETSID = 0x80
+        }
+    }
+    struct posix_spawnattr_t
+    {
+        short __flags;
+        pid_t __pgrp;
+        sigset_t __sd;
+        sigset_t __ss;
+        sched_param __sp;
+        int __policy;
+        int[16] __pad;
+    }
+    private struct __spawn_action;
+    struct posix_spawn_file_actions_t
+    {
+        int __allocated;
+        int __used;
+        __spawn_action* __actions;
+        int[16] __pad;
+    }
+}
 else
     static assert(0, "Unsupported OS");
diff --git a/druntime/src/core/sys/posix/sys/ioctl.d b/druntime/src/core/sys/posix/sys/ioctl.d
index 27584d357c4d..56bc87e25296 100644
--- a/druntime/src/core/sys/posix/sys/ioctl.d
+++ b/druntime/src/core/sys/posix/sys/ioctl.d
@@ -400,6 +400,43 @@ else version (DragonFlyBSD)
 else version (Solaris)
 {
 }
+else version (Hurd)
+{
+    struct tchars
+    {
+        char t_intrc;
+        char t_quitc;
+        char t_startc;
+        char t_stopc;
+        char t_eofc;
+        char t_brkc;
+    }
+    struct ltchars
+    {
+        char t_suspc;
+        char t_dsuspc;
+        char t_rprntc;
+        char t_flushc;
+        char t_werasc;
+        char t_lnextc;
+    }
+    struct sgttyb
+    {
+        char sg_ispeed;
+        char sg_ospeed;
+        char sg_erase;
+        char sg_kill;
+        short sg_flags;
+    }
+
+    struct winsize
+    {
+        ushort ws_row;
+        ushort ws_col;
+        ushort ws_xpixel;
+        ushort ws_ypixel;
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/sys/ipc.d b/druntime/src/core/sys/posix/sys/ipc.d
index 32caba95a107..1d12841fffa7 100644
--- a/druntime/src/core/sys/posix/sys/ipc.d
+++ b/druntime/src/core/sys/posix/sys/ipc.d
@@ -246,6 +246,49 @@ else version (Solaris)
     enum IPC_SET        = 11;
     enum IPC_STAT       = 12;
 }
+else version (Hurd)
+{
+    version (X86)
+    {
+        struct ipc_perm
+        {
+            key_t   __key;
+            ushort   uid;
+            ushort   gid;
+            ushort   cuid;
+            ushort   cgid;
+            ushort  mode;
+            ushort  __seq;
+        }
+    }
+    else version (X86_64)
+    {
+        struct ipc_perm
+        {
+            key_t   __key;
+            uid_t   uid;
+            gid_t   gid;
+            uid_t   cuid;
+            gid_t   cgid;
+            mode_t  mode;
+            ushort  __seq;
+        }
+    }
+    else
+    {
+        static assert(false, "Unsupported platform");
+    }
+
+    enum IPC_CREAT      = 0x0200; // 01000
+    enum IPC_EXCL       = 0x0400; // 02000
+    enum IPC_NOWAIT     = 0x0800; // 04000
+
+    enum key_t IPC_PRIVATE = 0;
+
+    enum IPC_RMID       = 0;
+    enum IPC_SET        = 1;
+    enum IPC_STAT       = 2;
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/sys/mman.d b/druntime/src/core/sys/posix/sys/mman.d
index 42da553c4042..538588dd3f69 100644
--- a/druntime/src/core/sys/posix/sys/mman.d
+++ b/druntime/src/core/sys/posix/sys/mman.d
@@ -170,6 +170,14 @@ else version (DragonFlyBSD)
 else version (Solaris)
 {
 }
+else version (Hurd)
+{
+    enum POSIX_MADV_NORMAL      = 0;
+    enum POSIX_MADV_RANDOM      = 1;
+    enum POSIX_MADV_SEQUENTIAL  = 2;
+    enum POSIX_MADV_WILLNEED    = 3;
+    enum POSIX_MADV_DONTNEED    = 4;
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -234,6 +242,13 @@ else version (Solaris)
     enum PROT_WRITE = 0x02;
     enum PROT_EXEC = 0x04;
 }
+else version (Hurd)
+{
+    enum PROT_NONE      = 0x00;
+    enum PROT_READ      = 0x04;
+    enum PROT_WRITE     = 0x02;
+    enum PROT_EXEC      = 0x01;
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -474,6 +489,19 @@ else version (Solaris)
     enum MS_SYNC = 0x0004;
     enum MS_ASYNC = 0x0001;
     enum MS_INVALIDATE  = 0x0002;
+}
+ else version (Hurd)
+{
+    enum MAP_SHARED     = 0x0010;
+    enum MAP_PRIVATE    = 0x0000;
+    enum MAP_FIXED      = 0x0100;
+    enum MAP_ANON       = 0x0002;
+
+    enum MAP_FAILED     = cast(void*)-1;
+
+    enum MS_ASYNC       = 1;
+    enum MS_INVALIDATE  = 0;
+    enum MS_SYNC        = 2;
 }
 else
 {
@@ -591,6 +619,11 @@ else version (Solaris)
     enum MCL_CURRENT = 0x0001;
     enum MCL_FUTURE = 0x0002;
 }
+else version (Hurd)
+{
+    enum MCL_CURRENT    = 0x0001;
+    enum MCL_FUTURE     = 0x0002;
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/sys/msg.d b/druntime/src/core/sys/posix/sys/msg.d
index 519811820f6a..fe56c5a5327a 100644
--- a/druntime/src/core/sys/posix/sys/msg.d
+++ b/druntime/src/core/sys/posix/sys/msg.d
@@ -173,6 +173,50 @@ version (linux)
         }
     }
 }
+else version (Hurd)
+{
+    import core.sys.hurd.sys.types;
+    enum MSG_STAT = 11;
+    enum MSG_INFO = 12;
+
+    enum MSG_NOERROR = 1 << 12; // octal!10000
+    enum  MSG_EXCEPT = 2 << 12; // octal!20000
+
+    struct msginfo
+    {
+        int msgpool;
+        int msgmap;
+        int msgmax;
+        int msgmnb;
+        int msgmni;
+        int msgssz;
+        int msgtql;
+        ushort msgseg;
+    }
+
+    alias msgqnum_t = ushort;
+    alias msglen_t = ushort;
+
+    private struct msg;
+    private struct __wait_queue;
+
+    struct msqid_ds
+    {
+        ipc_perm msg_perm;
+        msg *__msg_first;
+        msg *__msg_last;
+        time_t msg_stime;
+        time_t msg_rtime;
+        time_t msg_ctime;
+        __wait_queue *__wwait;
+        __wait_queue *__rwait;
+        ushort __msg_cbytes;
+        msgqnum_t msg_qnum;
+        msglen_t msg_qbytes;
+        ipc_pid_t msg_lspid;
+        ipc_pid_t msg_lrpid;
+    }
+}
 else
 {
     // https://sourceware.org/git/?p=glibc.git;a=blob;f=bits/msq.h
diff --git a/druntime/src/core/sys/posix/sys/resource.d b/druntime/src/core/sys/posix/sys/resource.d
index eb62e4950fd3..6221814f88c8 100644
--- a/druntime/src/core/sys/posix/sys/resource.d
+++ b/druntime/src/core/sys/posix/sys/resource.d
@@ -477,6 +477,64 @@ else version (Solaris)
         RLIMIT_AS     = 6,
     }
 }
+else version (Hurd)
+{
+    enum
+    {
+        PRIO_PROCESS = 0,
+        PRIO_PGRP    = 1,
+        PRIO_USER    = 2,
+    }
+
+    static if (__USE_FILE_OFFSET64)
+         alias rlim_t = ulong;
+    else
+         alias rlim_t = c_ulong;
+
+    static if (__USE_FILE_OFFSET64)
+        enum RLIM_INFINITY = 0xffffffffffffffffUL;
+    else
+        enum RLIM_INFINITY = cast(c_ulong)(~0UL);
+
+    enum RLIM_SAVED_MAX = RLIM_INFINITY;
+    enum RLIM_SAVED_CUR = RLIM_INFINITY;
+
+    enum
+    {
+        RUSAGE_SELF     =  0,
+        RUSAGE_CHILDREN = -1,
+    }
+
+    struct rusage
+    {
+        timeval ru_utime;
+        timeval ru_stime;
+        c_long ru_maxrss;
+        c_long ru_ixrss;
+        c_long ru_idrss;
+        c_long ru_isrss;
+        c_long ru_minflt;
+        c_long ru_majflt;
+        c_long ru_nswap;
+        c_long ru_inblock;
+        c_long ru_oublock;
+        c_long ru_msgsnd;
+        c_long ru_msgrcv;
+        c_long ru_nsignals;
+        c_long ru_nvcsw;
+        c_long ru_nivcsw;
+    }
+    enum
+    {
+        RLIMIT_CORE   = 4,
+        RLIMIT_CPU    = 0,
+        RLIMIT_DATA   = 2,
+        RLIMIT_FSIZE  = 1,
+        RLIMIT_NOFILE = 8,
+        RLIMIT_STACK  = 3,
+        RLIMIT_AS     = 10,
+    }
+}
 else
     static assert (false, "Unsupported platform");
 
diff --git a/druntime/src/core/sys/posix/sys/shm.d b/druntime/src/core/sys/posix/sys/shm.d
index 358fcf9e3226..4ef4755ce57f 100644
--- a/druntime/src/core/sys/posix/sys/shm.d
+++ b/druntime/src/core/sys/posix/sys/shm.d
@@ -180,6 +180,32 @@ else version (Darwin)
 else version (Solaris)
 {
 
+}
+else version (Hurd)
+{
+    import core.sys.hurd.sys.types;
+    enum SHM_RDONLY     = 0x01000; // 010000
+    enum SHM_RND        = 0x02000; // 020000
+    enum SHM_REMAP      = 0x4000; // 040000
+
+    alias shmatt_t = short;
+
+    private struct __vm_area_struct;
+
+    struct shmid_ds
+    {
+        ipc_perm    shm_perm;
+        size_t      shm_segsz;
+        time_t      shm_atime;
+        time_t      shm_dtime;
+        time_t      shm_ctime;
+        ipc_pid_t   shm_cpid;
+        ipc_pid_t   shm_lpid;
+        shmatt_t    shm_nattch;
+        private ushort      __shm_npages;
+        private c_ulong*    __shm_pages;
+        private __vm_area_struct* __attaches;
+    }
 }
 else
 {
diff --git a/druntime/src/core/sys/posix/sys/socket.d b/druntime/src/core/sys/posix/sys/socket.d
index 0ae101db0984..c121a2bba036 100644
--- a/druntime/src/core/sys/posix/sys/socket.d
+++ b/druntime/src/core/sys/posix/sys/socket.d
@@ -1598,6 +1598,153 @@ else version (Solaris)
         SHUT_RDWR
     }
 }
+else version (Hurd)
+{
+    alias socklen_t = uint;
+    alias sa_family_t = ubyte;
+
+    struct sockaddr
+    {
+        ubyte       ss_len;
+        sa_family_t sa_family;
+        byte[14]    sa_data;
+    }
+
+    private enum : size_t
+    {
+        _SS_SIZE    = 128,
+        _SS_PADSIZE = _SS_SIZE - c_ulong.sizeof - sa_family_t.sizeof - ubyte.sizeof,
+    }
+
+    struct sockaddr_storage
+    {
+        ubyte       ss_len;
+        sa_family_t ss_family;
+        byte[_SS_PADSIZE] __ss_padding;
+        c_ulong     __ss_align;
+    }
+    struct msghdr
+    {
+        void*      msg_name;
+        socklen_t  msg_namelen;
+        iovec*     msg_iov;
+        int        msg_iovlen;
+        void*      msg_control;
+        socklen_t  msg_controllen;
+        int        msg_flags;
+    }
+
+    struct cmsghdr
+    {
+        socklen_t cmsg_len;
+        int        cmsg_level;
+        int        cmsg_type;
+    }
+    enum : uint
+    {
+        SCM_RIGHTS = 0x01
+    }
+
+    extern (D) inout(ubyte)*   CMSG_DATA( return scope inout(cmsghdr)* cmsg ) pure nothrow @nogc { return cast(ubyte*)( cmsg + 1 ); }
+    private inout(cmsghdr)* __cmsg_nxthdr(inout(msghdr)*, inout(cmsghdr)*) pure nothrow @nogc;
+    extern (D)  inout(cmsghdr)* CMSG_NXTHDR(inout(msghdr)* msg, inout(cmsghdr)* cmsg) pure nothrow @nogc
+    {
+        return __cmsg_nxthdr(msg, cmsg);
+    }
+
+    extern (D) inout(cmsghdr)* CMSG_FIRSTHDR( inout(msghdr)* mhdr ) pure nothrow @nogc
+    {
+        return ( cast(size_t)mhdr.msg_controllen >= cmsghdr.sizeof
+                 ? cast(inout(cmsghdr)*) mhdr.msg_control
+                 : cast(inout(cmsghdr)*) null );
+    }
+
+    extern (D)
+     {
+         size_t CMSG_ALIGN( size_t len ) pure nothrow @nogc
+         {
+             return (len + size_t.sizeof - 1) & cast(size_t) (~(size_t.sizeof - 1));
+         }
+
+         size_t CMSG_LEN( size_t len ) pure nothrow @nogc
+         {
+             return CMSG_ALIGN(cmsghdr.sizeof) + len;
+         }
+     }
+
+    extern (D) size_t CMSG_SPACE(size_t len) pure nothrow @nogc
+    {
+        return CMSG_ALIGN(len) + CMSG_ALIGN(cmsghdr.sizeof);
+    }
+    struct linger
+    {
+        int l_onoff;
+        int l_linger;
+    }
+
+    enum
+    {
+        SOCK_DGRAM      = 2,
+        SOCK_RDM        = 4,
+        SOCK_SEQPACKET  = 5,
+        SOCK_STREAM     = 1,
+    }
+    enum
+    {
+        SOL_SOCKET      = 0xffff
+    }
+    enum
+    {
+        SO_ACCEPTCONN   = 0x0002,
+        SO_BROADCAST    = 0x0020,
+        SO_DEBUG        = 0x0001,
+        SO_DONTROUTE    = 0x0010,
+        SO_ERROR        = 0x1007,
+        SO_KEEPALIVE    = 0x0008,
+        SO_LINGER       = 0x0080,
+        SO_OOBINLINE    = 0x0100,
+        SO_RCVBUF       = 0x1002,
+        SO_RCVLOWAT     = 0x1004,
+        SO_RCVTIMEO     = 0x1006,
+        SO_REUSEADDR    = 0x0004,
+        SO_REUSEPORT    = 0x0200,
+        SO_SNDBUF       = 0x1002,
+        SO_SNDLOWAT     = 0x1003,
+        SO_SNDTIMEO     = 0x1005,
+        SO_TYPE         = 0x1008
+    }
+    enum
+    {
+        SOMAXCONN       = 128
+    }
+    enum : uint
+    {
+        MSG_CTRUNC      = 0x20,
+        MSG_DONTROUTE   = 0x04,
+        MSG_EOR         = 0x08,
+        MSG_OOB         = 0x01,
+        MSG_PEEK        = 0x02,
+        MSG_TRUNC       = 0x10,
+        MSG_WAITALL     = 0x40,
+        MSG_NOSIGNAL    = 0x0400
+    }
+
+    enum
+    {
+        AF_INET         = 2,
+        AF_LOCAL        = 1,
+        AF_UNIX         = AF_LOCAL,
+        AF_UNSPEC       = 0,
+        AF_APPLETALK    = 16,
+        AF_IPX          = 23
+    }
+    enum
+    {
+        SHUT_RD             = 0,
+        SHUT_WR             = 1,
+        SHUT_RDWR           = 2
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -1899,6 +2046,13 @@ else version (Solaris)
         AF_INET6 = 26,
     }
 }
+else version (Hurd)
+{
+    enum
+    {
+        AF_INET6 = 26,
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -1960,6 +2114,13 @@ else version (Solaris)
         SOCK_RAW = 4,
     }
 }
+else version (Hurd)
+{
+    enum
+    {
+        SOCK_RAW = 3,
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/sys/stat.d b/druntime/src/core/sys/posix/sys/stat.d
index a14fc149d707..40b21f3a4007 100644
--- a/druntime/src/core/sys/posix/sys/stat.d
+++ b/druntime/src/core/sys/posix/sys/stat.d
@@ -1540,6 +1540,64 @@ else version (Solaris)
     enum S_ISGID = 0x400;
     enum S_ISVTX = 0x200;
 }
+else version (Hurd)
+{
+    import core.sys.hurd.sys.types;
+    static if (__USE_FILE_OFFSET64)
+        private enum SPARE_SIZE = 8;
+    else
+        private enum SPARE_SIZE = 11;
+
+    struct stat_t
+    {
+        int       st_fstype;            /* File system type.  */
+        fsid_t    st_fsid;              /* File system ID.  */
+        alias st_dev = st_fsid;
+        ino_t     st_ino;               /* File number. */
+        uint      st_gen;
+        dev_t     st_rdev;
+        mode_t    st_mode;
+        nlink_t   st_nlink;
+        uid_t     st_uid;
+        gid_t     st_gid;
+        off_t     st_size;
+
+        static if (_DEFAULT_SOURCE || _XOPEN_SOURCE >= 700)
+        {
+            timespec    st_atim;
+            timespec    st_mtim;
+            timespec    st_ctim;
+            extern(D) @safe @property inout pure nothrow
+            {
+                ref inout(time_t) st_atime() return { return st_atim.tv_sec; }
+                ref inout(time_t) st_mtime() return { return st_mtim.tv_sec; }
+                ref inout(time_t) st_ctime() return { return st_ctim.tv_sec; }
+            }
+      }
+      else
+      {
+            time_t      st_atime;
+            c_ulong     st_atimensec;
+            time_t      st_mtime;
+            c_ulong     st_mtimensec;
+            time_t      st_ctime;
+            c_ulong     st_ctimensec;
+      }
+
+        blksize_t   st_blksize;
+        blkcnt_t    st_blocks;
+
+        uid_t       st_author;
+        uint        st_flags;
+        int[SPARE_SIZE]      st_spare;
+    }
+    version (X86)     static assert(stat_t.sizeof == 128);
+    version (X86_64)  static assert(stat_t.sizeof == 176);
+
+    enum S_ISUID    = 0x800; // octal 0004000
+    enum S_ISGID    = 0x400; // octal 0002000
+    enum S_ISVTX    = 0x200; // octal 0001000
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -2211,6 +2269,11 @@ else version (Solaris)
     enum UTIME_NOW = -1;
     enum UTIME_OMIT = -2;
 }
+else version (Hurd)
+{
+    enum UTIME_NOW = -1;
+    enum UTIME_OMIT = -2;
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -2317,6 +2380,17 @@ else version (Solaris)
     enum S_IFDOOR = 0xD000;
     enum S_IFPORT = 0xE000;
 }
+else version (Hurd)
+{
+    enum S_IFMT     = 0xF000; // octal 0170000
+    enum S_IFBLK    = 0x6000; // octal 0060000
+    enum S_IFCHR    = 0x2000; // octal 0020000
+    enum S_IFIFO    = 0x1000; // octal 0010000
+    enum S_IFREG    = 0x8000; // octal 0100000
+    enum S_IFDIR    = 0x4000; // octal 0040000
+    enum S_IFLNK    = 0xA000; // octal 0120000
+    enum S_IFSOCK   = 0xC000; // octal 0140000
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/sys/posix/sys/statvfs.d b/druntime/src/core/sys/posix/sys/statvfs.d
index a8f3dd506549..327f235a9b0e 100644
--- a/druntime/src/core/sys/posix/sys/statvfs.d
+++ b/druntime/src/core/sys/posix/sys/statvfs.d
@@ -18,71 +18,117 @@ nothrow:
 @nogc:
 
 version (CRuntime_Glibc) {
-    static if (__WORDSIZE == 32)
+    version (linux)
     {
-        version=_STATVFSBUF_F_UNUSED;
-    }
-    struct statvfs_t
-    {
-        c_ulong f_bsize;
-        c_ulong f_frsize;
-        fsblkcnt_t f_blocks;
-        fsblkcnt_t f_bfree;
-        fsblkcnt_t f_bavail;
-        fsfilcnt_t f_files;
-        fsfilcnt_t f_ffree;
-        fsfilcnt_t f_favail;
-        c_ulong f_fsid;
-        version (_STATVFSBUF_F_UNUSED)
+        static if (__WORDSIZE == 32)
         {
-            int __f_unused;
+            version=_STATVFSBUF_F_UNUSED;
+        }
+        struct statvfs_t
+        {
+            c_ulong f_bsize;
+            c_ulong f_frsize;
+            fsblkcnt_t f_blocks;
+            fsblkcnt_t f_bfree;
+            fsblkcnt_t f_bavail;
+            fsfilcnt_t f_files;
+            fsfilcnt_t f_ffree;
+            fsfilcnt_t f_favail;
+            c_ulong f_fsid;
+            version (_STATVFSBUF_F_UNUSED)
+            {
+                int __f_unused;
+            }
+            c_ulong f_flag;
+            c_ulong f_namemax;
+            int[6] __f_spare;
+        }
+        /* Definitions for the flag in `f_flag'.  These definitions should be
+           kept in sync with the definitions in <sys/mount.h>.  */
+        static if (_GNU_SOURCE)
+        {
+            enum FFlag
+            {
+                ST_RDONLY = 1,        /* Mount read-only.  */
+                ST_NOSUID = 2,
+                ST_NODEV = 4,         /* Disallow access to device special files.  */
+                ST_NOEXEC = 8,        /* Disallow program execution.  */
+                ST_SYNCHRONOUS = 16,      /* Writes are synced at once.  */
+                ST_MANDLOCK = 64,     /* Allow mandatory locks on an FS.  */
+                ST_WRITE = 128,       /* Write on file/directory/symlink.  */
+                ST_APPEND = 256,      /* Append-only file.  */
+                ST_IMMUTABLE = 512,       /* Immutable file.  */
+                ST_NOATIME = 1024,        /* Do not update access times.  */
+                ST_NODIRATIME = 2048,     /* Do not update directory access times.  */
+                ST_RELATIME = 4096        /* Update atime relative to mtime/ctime.  */
+
+            }
+        }  /* Use GNU.  */
+        else
+        { // Posix defined:
+            enum FFlag
+                {
+                    ST_RDONLY = 1,        /* Mount read-only.  */
+                    ST_NOSUID = 2
+                }
+        }
+        static if ( __USE_FILE_OFFSET64 )
+        {
+            int statvfs64 (const char * file, statvfs_t* buf);
+            alias statvfs = statvfs64;
+
+            int fstatvfs64 (int fildes, statvfs_t *buf) @trusted;
+            alias fstatvfs = fstatvfs64;
+        }
+        else
+        {
+            int statvfs (const char * file, statvfs_t* buf);
+            int fstatvfs (int fildes, statvfs_t *buf);
         }
-        c_ulong f_flag;
-        c_ulong f_namemax;
-        int[6] __f_spare;
     }
-    /* Definitions for the flag in `f_flag'.  These definitions should be
-      kept in sync with the definitions in <sys/mount.h>.  */
-    static if (_GNU_SOURCE)
+    else version (Hurd)
     {
-        enum FFlag
+        import core.sys.hurd.sys.types;
+        struct statvfs_t
         {
-            ST_RDONLY = 1,        /* Mount read-only.  */
-            ST_NOSUID = 2,
-            ST_NODEV = 4,         /* Disallow access to device special files.  */
-            ST_NOEXEC = 8,        /* Disallow program execution.  */
-            ST_SYNCHRONOUS = 16,      /* Writes are synced at once.  */
-            ST_MANDLOCK = 64,     /* Allow mandatory locks on an FS.  */
-            ST_WRITE = 128,       /* Write on file/directory/symlink.  */
-            ST_APPEND = 256,      /* Append-only file.  */
-            ST_IMMUTABLE = 512,       /* Immutable file.  */
-            ST_NOATIME = 1024,        /* Do not update access times.  */
-            ST_NODIRATIME = 2048,     /* Do not update directory access times.  */
-            ST_RELATIME = 4096        /* Update atime relative to mtime/ctime.  */
-
+            uint       f_type;
+            c_ulong    f_bsize;
+            fsblkcnt_t f_blocks;
+            fsblkcnt_t f_bfree;
+            fsblkcnt_t f_bavail;
+            fsfilcnt_t f_files;
+            fsfilcnt_t f_ffree;
+            fsid_t     f_fsid;
+            c_ulong    f_namelen;
+            fsfilcnt_t f_favail;
+            c_ulong    f_frsize;
+            c_ulong    f_flag;
+            uint[3]    f_spare;
         }
-    }  /* Use GNU.  */
-    else
-    { // Posix defined:
+
         enum FFlag
         {
-            ST_RDONLY = 1,        /* Mount read-only.  */
-            ST_NOSUID = 2
+            ST_RDONLY = 1,
+            ST_NOSUID = 2,
+            ST_NOEXEC = 8,
+            ST_SYNCHRONOUS = 16,
+            ST_NOATIME = 32,
+            ST_RELATIME = 64,
         }
-    }
 
-    static if ( __USE_FILE_OFFSET64 )
-    {
-        int statvfs64 (const char * file, statvfs_t* buf);
-        alias statvfs = statvfs64;
+        static if ( __USE_FILE_OFFSET64 )
+        {
+            int statvfs64 (const char * file, statvfs_t* buf);
+            alias statvfs = statvfs64;
 
-        int fstatvfs64 (int fildes, statvfs_t *buf) @trusted;
-        alias fstatvfs = fstatvfs64;
-    }
-    else
-    {
-        int statvfs (const char * file, statvfs_t* buf);
-        int fstatvfs (int fildes, statvfs_t *buf);
+            int fstatvfs64 (int fildes, statvfs_t *buf) @trusted;
+            alias fstatvfs = fstatvfs64;
+        }
+        else
+        {
+            int statvfs (const char * file, statvfs_t* buf);
+            int fstatvfs (int fildes, statvfs_t *buf);
+        }
     }
 }
 else version (CRuntime_Musl)
diff --git a/druntime/src/core/sys/posix/sys/types.d b/druntime/src/core/sys/posix/sys/types.d
index cad60b4da4d2..45e655c3b66c 100644
--- a/druntime/src/core/sys/posix/sys/types.d
+++ b/druntime/src/core/sys/posix/sys/types.d
@@ -328,6 +328,32 @@ else version (Solaris)
     alias time_t = c_long;
     alias uid_t = uint;
 }
+else version (Hurd)
+{
+    static if ( __USE_FILE_OFFSET64 )
+    {
+        alias blkcnt_t = long;
+        alias ino_t = ulong;
+        alias off_t = long;
+    }
+    else
+    {
+        alias blkcnt_t = slong_t;
+        alias ino_t = ulong_t;
+        alias off_t = slong_t;
+    }
+    alias blksize_t = slong_t;
+    alias dev_t = ulong_t;
+    alias gid_t = uint;
+    alias mode_t = uint;
+    alias nlink_t = ulong_t;
+    alias pid_t = int;
+    //size_t (defined in core.stdc.stddef)
+    alias ssize_t = c_long;
+    alias uid_t = uint;
+
+    alias time_t = slong_t;
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -439,6 +465,24 @@ else version (Solaris)
     alias zoneid_t = id_t;
     alias ctid_t = id_t;
 }
+else version (Hurd)
+{
+    static if ( __USE_FILE_OFFSET64 )
+    {
+        alias fsblkcnt_t = ulong;
+        alias fsfilcnt_t = ulong;
+    }
+    else
+    {
+        alias fsblkcnt_t = ulong_t;
+        alias fsfilcnt_t = ulong_t;
+    }
+    alias clock_t = slong_t;
+    alias id_t = uint;
+    alias key_t = int;
+    alias suseconds_t = slong_t;
+    alias useconds_t = uint;
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -462,287 +506,378 @@ pthread_t
 
 version (CRuntime_Glibc)
 {
-    version (X86)
+    version (linux)
     {
-        enum __SIZEOF_PTHREAD_ATTR_T = 36;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 24;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 20;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            version (X86)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 36;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 24;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 20;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (X86_64)
+            {
+                static if (__WORDSIZE == 64)
+                {
+                    enum __SIZEOF_PTHREAD_ATTR_T = 56;
+                    enum __SIZEOF_PTHREAD_MUTEX_T = 40;
+                    enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                    enum __SIZEOF_PTHREAD_COND_T = 48;
+                    enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                    enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                    enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                    enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                    enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+                }
+                else
+                {
+                    enum __SIZEOF_PTHREAD_ATTR_T = 32;
+                    enum __SIZEOF_PTHREAD_MUTEX_T = 32;
+                    enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                    enum __SIZEOF_PTHREAD_COND_T = 48;
+                    enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                    enum __SIZEOF_PTHREAD_RWLOCK_T = 44;
+                    enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                    enum __SIZEOF_PTHREAD_BARRIER_T = 20;
+                    enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+                }
+            }
+            else version (AArch64)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 64;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 48;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 8;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 8;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 8;
+            }
+            else version (ARM)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 36;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 24;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 20;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (HPPA)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 36;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 48;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 64;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 48;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (IA64)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 56;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 40;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (MIPS32)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 36;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 24;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 20;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (MIPS64)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 56;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 40;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (PPC)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 36;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 24;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 20;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (PPC64)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 56;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 40;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (RISCV32)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 36;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 24;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 20;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (RISCV64)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 56;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 40;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (SPARC)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 36;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 24;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 20;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (SPARC64)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 56;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 40;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (S390)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 36;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 24;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 20;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (SystemZ)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 56;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 40;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else version (LoongArch64)
+            {
+                enum __SIZEOF_PTHREAD_ATTR_T = 56;
+                enum __SIZEOF_PTHREAD_MUTEX_T = 40;
+                enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
+                enum __SIZEOF_PTHREAD_COND_T = 48;
+                enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
+                enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
+                enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
+                enum __SIZEOF_PTHREAD_BARRIER_T = 32;
+                enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            }
+            else
+            {
+                static assert (false, "Unsupported platform");
+            }
+
+            union pthread_attr_t
+            {
+                byte[__SIZEOF_PTHREAD_ATTR_T] __size;
+                c_long __align;
+            }
+
+            private alias __atomic_lock_t = int;
+
+            private struct _pthread_fastlock
+            {
+                c_long          __status;
+                __atomic_lock_t __spinlock;
+            }
+
+            private alias _pthread_descr = void*;
+
+            union pthread_cond_t
+            {
+                byte[__SIZEOF_PTHREAD_COND_T] __size;
+                long  __align;
+            }
+
+            union pthread_condattr_t
+            {
+                byte[__SIZEOF_PTHREAD_CONDATTR_T] __size;
+                int __align;
+            }
+
+            alias pthread_key_t = uint;
+
+            union pthread_mutex_t
+            {
+                byte[__SIZEOF_PTHREAD_MUTEX_T] __size;
+                c_long __align;
+            }
+
+            union pthread_mutexattr_t
+            {
+                byte[__SIZEOF_PTHREAD_MUTEXATTR_T] __size;
+                int __align;
+            }
+
+            alias pthread_once_t = int;
+
+            struct pthread_rwlock_t
+            {
+                byte[__SIZEOF_PTHREAD_RWLOCK_T] __size;
+                c_long __align;
+            }
+
+            struct pthread_rwlockattr_t
+            {
+                byte[__SIZEOF_PTHREAD_RWLOCKATTR_T] __size;
+                c_long __align;
+            }
+
+            alias pthread_t = c_ulong;
     }
-    else version (X86_64)
+    else version (Hurd)
     {
-        static if (__WORDSIZE == 64)
-        {
-            enum __SIZEOF_PTHREAD_ATTR_T = 56;
-            enum __SIZEOF_PTHREAD_MUTEX_T = 40;
-            enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-            enum __SIZEOF_PTHREAD_COND_T = 48;
-            enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-            enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-            enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-            enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-            enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-        }
-        else
+        import core.sys.hurd.sys.types;
+        import core.sys.posix.time: clockid_t;
+
+        private struct __sched_param
         {
-            enum __SIZEOF_PTHREAD_ATTR_T = 32;
-            enum __SIZEOF_PTHREAD_MUTEX_T = 32;
-            enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-            enum __SIZEOF_PTHREAD_COND_T = 48;
-            enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-            enum __SIZEOF_PTHREAD_RWLOCK_T = 44;
-            enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-            enum __SIZEOF_PTHREAD_BARRIER_T = 20;
-            enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
+            int __sched_priority;
         }
-    }
-    else version (AArch64)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 64;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 48;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 8;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 8;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 8;
-    }
-    else version (ARM)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 36;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 24;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 20;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (HPPA)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 36;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 48;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 64;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 48;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (IA64)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 56;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 40;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (MIPS32)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 36;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 24;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 20;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (MIPS64)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 56;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 40;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (PPC)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 36;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 24;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 20;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (PPC64)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 56;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 40;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (RISCV32)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 36;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 24;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 20;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (RISCV64)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 56;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 40;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (SPARC)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 36;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 24;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 20;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (SPARC64)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 56;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 40;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (S390)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 36;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 24;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 32;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 20;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (SystemZ)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 56;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 40;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else version (LoongArch64)
-    {
-        enum __SIZEOF_PTHREAD_ATTR_T = 56;
-        enum __SIZEOF_PTHREAD_MUTEX_T = 40;
-        enum __SIZEOF_PTHREAD_MUTEXATTR_T = 4;
-        enum __SIZEOF_PTHREAD_COND_T = 48;
-        enum __SIZEOF_PTHREAD_CONDATTR_T = 4;
-        enum __SIZEOF_PTHREAD_RWLOCK_T = 56;
-        enum __SIZEOF_PTHREAD_RWLOCKATTR_T = 8;
-        enum __SIZEOF_PTHREAD_BARRIER_T = 32;
-        enum __SIZEOF_PTHREAD_BARRIERATTR_T = 4;
-    }
-    else
-    {
-        static assert (false, "Unsupported platform");
-    }
 
-    union pthread_attr_t
-    {
-        byte[__SIZEOF_PTHREAD_ATTR_T] __size;
-        c_long __align;
-    }
+        private struct __pthread;
 
-    private alias __atomic_lock_t = int;
-
-    private struct _pthread_fastlock
-    {
-        c_long          __status;
-        __atomic_lock_t __spinlock;
-    }
+        struct pthread_attr_t
+        {
+            __sched_param schedparam;
+            void* stackaddr;
+            size_t __stacksize;
+            size_t __guardsize;
+            int __detachstate;
+            int __inheritsched;
+            int __contentionscope;
+            int __schedpolicy;
+        }
 
-    private alias _pthread_descr = void*;
+        struct pthread_cond_t
+        {
+            pthread_spinlock_t __lock;
+            __pthread *__queue;
+            pthread_condattr_t *__attr;
+            uint __wrefs;
+            void *__data;
+        }
 
-    union pthread_cond_t
-    {
-        byte[__SIZEOF_PTHREAD_COND_T] __size;
-        long  __align;
-    }
+        struct pthread_condattr_t
+        {
+            int __pshared;
+            clockid_t __clock;
+        }
 
-    union pthread_condattr_t
-    {
-        byte[__SIZEOF_PTHREAD_CONDATTR_T] __size;
-        int __align;
-    }
+        alias pthread_key_t = int;
 
-    alias pthread_key_t = uint;
+        struct pthread_mutex_t
+        {
+            uint __lock;
+            uint __owner_id;
+            uint __cnt;
+            int __shpid;
+            int __type;
+            int __flags;
+            union
+            {
+                uint[2] __reserved;
+                void *__pointer_aligned;
+            }
+        }
 
-    union pthread_mutex_t
-    {
-        byte[__SIZEOF_PTHREAD_MUTEX_T] __size;
-        c_long __align;
-    }
+        struct pthread_mutexattr_t
+        {
+            int __prioceiling;
+            int __protocol;
+            int __pshared;
+            int __mutex_type;
+        }
 
-    union pthread_mutexattr_t
-    {
-        byte[__SIZEOF_PTHREAD_MUTEXATTR_T] __size;
-        int __align;
-    }
+        struct pthread_once_t
+        {
+            int __run;
+            pthread_spinlock_t __lock;
+        }
 
-    alias pthread_once_t = int;
+        struct pthread_rwlock_t
+        {
+            pthread_spinlock_t __held;
+            pthread_spinlock_t __lock;
+            int __readers;
+            __pthread *__readerqueue;
+            __pthread *__writerqueue;
+            pthread_rwlockattr_t *__attr;
+            void *__data;
+        }
 
-    struct pthread_rwlock_t
-    {
-        byte[__SIZEOF_PTHREAD_RWLOCK_T] __size;
-        c_long __align;
-    }
+        struct pthread_rwlockattr_t
+        {
+            int __pshared;
+        }
 
-    struct pthread_rwlockattr_t
-    {
-        byte[__SIZEOF_PTHREAD_RWLOCKATTR_T] __size;
-        c_long __align;
+        alias pthread_t = c_ulong;
     }
-
-    alias pthread_t = c_ulong;
 }
 else version (CRuntime_Musl)
 {
@@ -1350,17 +1485,37 @@ pthread_barrierattr_t
 
 version (CRuntime_Glibc)
 {
-    struct pthread_barrier_t
-    {
-        byte[__SIZEOF_PTHREAD_BARRIER_T] __size;
-        c_long __align;
-    }
+  version (linux)
+  {
+      struct pthread_barrier_t
+      {
+          byte[__SIZEOF_PTHREAD_BARRIER_T] __size;
+          c_long __align;
+      }
 
-    struct pthread_barrierattr_t
-    {
-        byte[__SIZEOF_PTHREAD_BARRIERATTR_T] __size;
-        int __align;
-    }
+      struct pthread_barrierattr_t
+      {
+          byte[__SIZEOF_PTHREAD_BARRIERATTR_T] __size;
+          int __align;
+      }
+  }
+  else version (Hurd)
+  {
+      struct pthread_barrier_t
+      {
+          pthread_spinlock_t __lock;
+          __pthread *__queue;
+          uint __pending;
+          uint __count;
+          pthread_barrierattr_t *__attr;
+          void *__data;
+      }
+
+      struct pthread_barrierattr_t
+      {
+          int __pshared;
+      }
+  }
 }
 else version (FreeBSD)
 {
diff --git a/druntime/src/core/sys/posix/sys/un.d b/druntime/src/core/sys/posix/sys/un.d
index 11e98a72ab2c..a65ead9bfa42 100644
--- a/druntime/src/core/sys/posix/sys/un.d
+++ b/druntime/src/core/sys/posix/sys/un.d
@@ -104,3 +104,16 @@ else version (Solaris)
         byte[108]    sun_path;
     }
 }
+else version (Hurd)
+{
+    struct sockaddr_un
+    {
+        ubyte       sun_len;
+        sa_family_t sun_family;
+        byte[108]   sun_path;
+    }
+}
+else
+{
+    static assert(false, "Unsupported platform");
+}
diff --git a/druntime/src/core/sys/posix/sys/utsname.d b/druntime/src/core/sys/posix/sys/utsname.d
index 5de50aca4654..507113b6fb64 100644
--- a/druntime/src/core/sys/posix/sys/utsname.d
+++ b/druntime/src/core/sys/posix/sys/utsname.d
@@ -19,19 +19,36 @@ nothrow:
 
 version (CRuntime_Glibc)
 {
-    private enum utsNameLength = 65;
-
-    struct utsname
+    version(linux)
     {
-        char[utsNameLength] sysname = 0;
-        char[utsNameLength] nodename = 0;
-        char[utsNameLength] release = 0;
-        char[utsNameLength] version_ = 0;
-        // TODO Deprecate after version_ has been in an official release.
-        alias update = version_;
-        char[utsNameLength] machine = 0;
+        private enum utsNameLength = 65;
+        struct utsname
+        {
+            char[utsNameLength] sysname = 0;
+            char[utsNameLength] nodename = 0;
+            char[utsNameLength] release = 0;
+            char[utsNameLength] version_ = 0;
+            // TODO Deprecate after version_ has been in an official release.
+            alias update = version_;
+            char[utsNameLength] machine = 0;
+
+            char[utsNameLength] __domainname = 0;
+        }
+    }
 
-        char[utsNameLength] __domainname = 0;
+    else version(Hurd)
+    {
+        private enum utsNameLength = 1024;
+        struct utsname
+        {
+            char[utsNameLength] sysname = 0;
+            char[utsNameLength] nodename = 0;
+            char[utsNameLength] release = 0;
+            char[utsNameLength] version_ = 0;
+            // TODO Deprecate after version_ has been in an official release.
+            alias update = version_;
+            char[utsNameLength] machine = 0;
+        }
     }
 
     int uname(utsname* __name);
diff --git a/druntime/src/core/sys/posix/sys/wait.d b/druntime/src/core/sys/posix/sys/wait.d
index 0c4e72e999b8..ab4106c748ae 100644
--- a/druntime/src/core/sys/posix/sys/wait.d
+++ b/druntime/src/core/sys/posix/sys/wait.d
@@ -106,6 +106,15 @@ else version (Solaris)
     enum WNOHANG        = 64;
     enum WUNTRACED      = 4;
 }
+else version (Hurd)
+{
+    enum WNOHANG        = 1;
+    enum WUNTRACED      = 2;
+    private
+    {
+        enum __W_CONTINUED = 0xFFFF;
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
@@ -430,6 +439,20 @@ else version (Solaris)
         P_CPUID,        /* CPU identifier.                      */
         P_PSETID,       /* Processor set identifier             */
     }
+}
+ else version (Hurd)
+{
+    enum WEXITED    = 16;
+    enum WSTOPPED   = WUNTRACED;
+    enum WCONTINUED = 4;
+    enum WNOWAIT    = 8;
+
+    enum idtype_t
+    {
+        P_ALL,
+        P_PID,
+        P_PGID
+    }
 }
 else
 {
diff --git a/druntime/src/core/sys/posix/termios.d b/druntime/src/core/sys/posix/termios.d
index 38181a9d84f3..e7371aa9b16b 100644
--- a/druntime/src/core/sys/posix/termios.d
+++ b/druntime/src/core/sys/posix/termios.d
@@ -831,6 +831,108 @@ else version (Solaris)
     enum B460800 = 22;
     enum B921600 = 23;
 }
+else version (Hurd)
+{
+    alias cc_t = ubyte;
+    alias speed_t = uint;
+    alias tcflag_t = uint;
+
+    enum NCCS   = 20;
+
+    struct termios
+    {
+        tcflag_t   c_iflag;
+        tcflag_t   c_oflag;
+        tcflag_t   c_cflag;
+        tcflag_t   c_lflag;
+        cc_t[NCCS] c_cc;
+        speed_t    c_ispeed;
+        speed_t    c_ospeed;
+    }
+
+    enum VEOF       = 0;
+    enum VEOL       = 1;
+    enum VERASE     = 3;
+    enum VINTR      = 8;
+    enum VKILL      = 5;
+    enum VMIN       = 16;
+    enum VQUIT      = 9;
+    enum VSTART     = 12;
+    enum VSTOP      = 13;
+    enum VSUSP      = 10;
+    enum VTIME      = 17;
+
+    enum BRKINT     = 0x0000002;
+    enum ICRNL      = 0x0000100;
+    enum IGNBRK     = 0x0000001;
+    enum IGNCR      = 0x0000080;
+    enum IGNPAR     = 0x0000004;
+    enum INLCR      = 0x0000040;
+    enum INPCK      = 0x0000010;
+    enum ISTRIP     = 0x0000020;
+    enum IXOFF      = 0x0000400;
+    enum IXON       = 0x0000200;
+    enum PARMRK     = 0x0000008;
+
+    enum OPOST      = 0x0000001;
+
+    enum B0         = 0;
+    enum B50        = 50;
+    enum B75        = 75;
+    enum B110       = 110;
+    enum B134       = 134;
+    enum B150       = 150;
+    enum B200       = 200;
+    enum B300       = 300;
+    enum B600       = 600;
+    enum B1200      = 1200;
+    enum B1800      = 1800;
+    enum B2400      = 2400;
+    enum B4800      = 4800;
+    enum B9600      = 9600;
+    enum B19200     = 19200;
+    enum B38400     = 38400;
+
+    enum CSIZE      = 0x0000300;
+    enum   CS5      = 0x0000000;
+    enum   CS6      = 0x0000100;
+    enum   CS7      = 0x0000200;
+    enum   CS8      = 0x0000300;
+    enum CSTOPB     = 0x0000400;
+    enum CREAD      = 0x0000800;
+    enum PARENB     = 0x0001000;
+    enum PARODD     = 0x0002000;
+    enum HUPCL      = 0x0004000;
+    enum CLOCAL     = 0x0008000;
+
+    enum ECHO       = 0x00000008;
+    enum ECHOE      = 0x00000002;
+    enum ECHOK      = 0x00000004;
+    enum ECHONL     = 0x00000010;
+    enum ICANON     = 0x00000100;
+    enum IEXTEN     = 0x00000400;
+    enum ISIG       = 0x00000080;
+    enum NOFLSH     = 0x80000000;
+    enum TOSTOP     = 0x00400000;
+
+    enum TCSANOW    = 0;
+    enum TCSADRAIN  = 1;
+    enum TCSAFLUSH  = 2;
+
+    enum TCIFLUSH   = 0;
+    enum TCOFLUSH   = 1;
+    enum TCIOFLUSH  = 2;
+
+    enum TCIOFF     = 3;
+    enum TCION      = 4;
+    enum TCOOFF     = 1;
+    enum TCOON      = 2;
+}
+else
+{
+    static assert(false, "Unsupported platform");
+}
+
 
 /*
 speed_t cfgetispeed(const scope termios*);
diff --git a/druntime/src/core/sys/posix/time.d b/druntime/src/core/sys/posix/time.d
index 4fc73aab8c5f..4ed44a1b565f 100644
--- a/druntime/src/core/sys/posix/time.d
+++ b/druntime/src/core/sys/posix/time.d
@@ -157,6 +157,10 @@ else version (Solaris)
 {
     enum CLOCK_MONOTONIC = 4;
 }
+else version (Hurd)
+{
+    enum CLOCK_MONOTONIC = 1;
+}
 else
 {
     static assert(0);
@@ -260,6 +264,14 @@ else version (Solaris)
 
     alias timestruc_t = timespec;
 }
+else version (Hurd)
+{
+    struct timespec
+    {
+        time_t  tv_sec;
+        c_long  tv_nsec;
+    }
+}
 else
 {
     static assert(false, "Unsupported platform");
diff --git a/druntime/src/core/thread/fiber/switch_context_asm.S b/druntime/src/core/thread/fiber/switch_context_asm.S
index cef64f65f019..ca448742628d 100644
--- a/druntime/src/core/thread/fiber/switch_context_asm.S
+++ b/druntime/src/core/thread/fiber/switch_context_asm.S
@@ -13,7 +13,7 @@
  *          http://www.boost.org/LICENSE_1_0.txt)
  */
 
-#if (__linux__ || __FreeBSD__ || __NetBSD__ || __OpenBSD__ || __DragonFly__) && __ELF__
+#if (__linux__ || __FreeBSD__ || __NetBSD__ || __OpenBSD__ || __DragonFly__ | __GNU__) && __ELF__
 /*
  * Mark the resulting object file as not requiring execution permissions on
  * stack memory. The absence of this section would mark the whole resulting
diff --git a/druntime/src/core/thread/osthread.d b/druntime/src/core/thread/osthread.d
index f42f6a9c7409..4056378cfbd0 100644
--- a/druntime/src/core/thread/osthread.d
+++ b/druntime/src/core/thread/osthread.d
@@ -2364,6 +2364,14 @@ extern (C) void thread_init() @nogc nothrow
             enum SIGRTMIN = SIGUSR1;
             enum SIGRTMAX = 32;
         }
+        else version (Hurd)
+        {
+            // Hurd does not support SIGRTMIN or SIGRTMAX
+            // Use SIGUSR1 for SIGRTMIN, SIGUSR2 for SIGRTMIN + 1
+            // And use 32 for SIGRTMAX (32 is the max signal number on Hurd)
+            enum SIGRTMIN = SIGUSR1;
+            enum SIGRTMAX = 32;
+        }
         else
         {
             import core.sys.posix.signal : SIGRTMAX, SIGRTMIN;
diff --git a/druntime/src/core/time.d b/druntime/src/core/time.d
index beb6963486cf..6f74b709fb4b 100644
--- a/druntime/src/core/time.d
+++ b/druntime/src/core/time.d
@@ -337,6 +337,17 @@ else version (Solaris) enum ClockType
     second = 6,
     threadCPUTime = 7,
 }
+else version (Hurd) enum ClockType
+{
+    normal = 0,
+    coarse = 2,
+    precise = 3,
+    // processCPUTime = 4,
+    raw = 5,
+    second = 6,
+    // threadCPUTime = 7,
+
+}
 else
 {
     // It needs to be decided (and implemented in an appropriate version branch
@@ -436,6 +447,20 @@ version (Posix)
             case second: assert(0);
             }
         }
+        else version (Hurd)
+        {
+            import core.sys.hurd.time;
+            with(ClockType) final switch (clockType)
+            {
+            case coarse: return CLOCK_MONOTONIC_COARSE;
+            case normal: return CLOCK_MONOTONIC;
+            case precise: return CLOCK_MONOTONIC;
+            // case processCPUTime: return CLOCK_PROCESS_CPUTIME_ID;
+            case raw: return CLOCK_MONOTONIC_RAW;
+            // case threadCPUTime: return CLOCK_THREAD_CPUTIME_ID;
+            case second: assert(0);
+            }
+        }
         else
             // It needs to be decided (and implemented in an appropriate
             // version branch here) which clock types new platforms are going
diff --git a/druntime/src/importc.h b/druntime/src/importc.h
index 50222da8c2c0..66d45ea920c4 100644
--- a/druntime/src/importc.h
+++ b/druntime/src/importc.h
@@ -179,7 +179,7 @@ typedef unsigned long long __uint64_t;
 #endif
 
 #define _Float16 float
-#ifdef __linux__  // Microsoft won't allow the following macro
+#if defined(__linux__) || defined(__GNU__)  // Microsoft won't allow the following macro
 // Ubuntu's assert.h uses this
 #define __PRETTY_FUNCTION__ __func__
 
@@ -202,7 +202,7 @@ typedef struct {} __SVFloat32_t;
 typedef struct {} __SVFloat64_t;
 #endif
 
-#endif // __linux__
+#endif // __linux__ || __GNU__
 
 #if __APPLE__
 #undef __SIZEOF_INT128__
diff --git a/druntime/src/rt/sections_elf_shared.d b/druntime/src/rt/sections_elf_shared.d
index aac5b402ae33..f16eca5d03df 100644
--- a/druntime/src/rt/sections_elf_shared.d
+++ b/druntime/src/rt/sections_elf_shared.d
@@ -64,6 +64,12 @@ else version (DragonFlyBSD)
     import core.sys.dragonflybsd.sys.elf : DT_AUXILIARY, DT_FILTER, DT_NEEDED, DT_STRTAB, PF_W, PF_X, PT_DYNAMIC, PT_LOAD, PT_TLS;
     import core.sys.dragonflybsd.sys.link_elf : ElfW, link_map;
 }
+else version (Hurd)
+{
+    import core.sys.hurd.dlfcn : Dl_info, dladdr, dlclose, dlinfo, dlopen, RTLD_DI_LINKMAP, RTLD_LAZY, RTLD_NOLOAD;
+    import core.sys.hurd.elf : DT_AUXILIARY, DT_FILTER, DT_NEEDED, DT_STRTAB, PF_W, PF_X, PT_DYNAMIC, PT_LOAD, PT_TLS;
+    import core.sys.hurd.link : ElfW, link_map;
+}
 else
 {
     static assert(0, "unimplemented");
@@ -744,6 +750,8 @@ version (Shared)
                     enum relocate = true;
                 else version (DragonFlyBSD)
                     enum relocate = true;
+                else version (Hurd)
+                    enum relocate = false;
                 else
                     static assert(0, "unimplemented");
 
diff --git a/druntime/test/importc_compare/src/importc_compare.d b/druntime/test/importc_compare/src/importc_compare.d
index bf3fd14172d8..9a7267ca477e 100644
--- a/druntime/test/importc_compare/src/importc_compare.d
+++ b/druntime/test/importc_compare/src/importc_compare.d
@@ -37,10 +37,14 @@ immutable ErrorFilter[] knownProblems = [
     ErrorFilter("core.stdc.locale.lconv", "", "Windows", 0, "https://issues.dlang.org/show_bug.cgi?id=24652"),
     ErrorFilter("core.stdc.math.double_t", "", "linux", 0, ""),
     ErrorFilter("core.stdc.math.float_t", "", "linux", 0, ""),
+    ErrorFilter("core.stdc.math.double_t", "", "Hurd", 0, ""),
+    ErrorFilter("core.stdc.math.float_t", "", "Hurd", 0, ""),
     ErrorFilter("core.stdc.signal.sig_atomic_t", "", "FreeBSD", 0, ""),
     ErrorFilter("core.stdc.stdio.FILE", "", "FreeBSD", 0, ""),
     ErrorFilter("core.stdc.stdio.FILE", "", "linux", 0, ""),
     ErrorFilter("core.stdc.stdio._IO_FILE", "", "linux", 0, ""),
+    ErrorFilter("core.stdc.stdio.FILE", "", "Hurd", 0, ""),
+    ErrorFilter("core.stdc.stdio._IO_FILE", "", "Hurd", 0, ""),
     ErrorFilter("core.stdc.stdio.__sFILE", "", "FreeBSD", 0, ""),
     ErrorFilter("core.stdc.wchar_.mbstate_t", "", "Apple", 0, ""),
     ErrorFilter("core.stdc.wchar_.mbstate_t", "", "Windows", 0, ""),
diff --git a/druntime/test/profile/myprofilegc.log.hurd.32.exp b/druntime/test/profile/myprofilegc.log.hurd.32.exp
new file mode 100644
index 000000000000..bdf8dd0a9b20
--- /dev/null
+++ b/druntime/test/profile/myprofilegc.log.hurd.32.exp
@@ -0,0 +1,18 @@
+bytes allocated, allocations, type, function, file:line
+            128	              1	float profilegc.main src/profilegc.d:18
+            128	              1	int profilegc.main src/profilegc.d:15
+             64	              1	double[] profilegc.main src/profilegc.d:56
+             48	              1	float[] profilegc.main src/profilegc.d:42
+             48	              1	int[] profilegc.main src/profilegc.d:41
+             32	              1	void[] profilegc.main src/profilegc.d:55
+             16	              1	C profilegc.main src/profilegc.d:12
+             16	              1	char[] profilegc.main src/profilegc.d:34
+             16	              1	char[] profilegc.main src/profilegc.d:36
+             16	              1	closure profilegc.main.foo src/profilegc.d:45
+             16	              1	float profilegc.main src/profilegc.d:16
+             16	              1	float profilegc.main src/profilegc.d:17
+             16	              1	int profilegc.main src/profilegc.d:13
+             16	              1	int profilegc.main src/profilegc.d:14
+             16	              1	int[] profilegc.main src/profilegc.d:22
+             16	              1	int[] profilegc.main src/profilegc.d:37
+             16	              1	wchar[] profilegc.main src/profilegc.d:35
diff --git a/druntime/test/profile/myprofilegc.log.hurd.64.exp b/druntime/test/profile/myprofilegc.log.hurd.64.exp
new file mode 100644
index 000000000000..0a882256c9de
--- /dev/null
+++ b/druntime/test/profile/myprofilegc.log.hurd.64.exp
@@ -0,0 +1,18 @@
+bytes allocated, allocations, type, function, file:line
+            160	              1	float profilegc.main src/profilegc.d:18
+            160	              1	int profilegc.main src/profilegc.d:15
+             64	              1	double[] profilegc.main src/profilegc.d:56
+             48	              1	float[] profilegc.main src/profilegc.d:42
+             48	              1	int[] profilegc.main src/profilegc.d:41
+             32	              1	C profilegc.main src/profilegc.d:12
+             32	              1	void[] profilegc.main src/profilegc.d:55
+             16	              1	char[] profilegc.main src/profilegc.d:34
+             16	              1	char[] profilegc.main src/profilegc.d:36
+             16	              1	closure profilegc.main.foo src/profilegc.d:45
+             16	              1	float profilegc.main src/profilegc.d:16
+             16	              1	float profilegc.main src/profilegc.d:17
+             16	              1	int profilegc.main src/profilegc.d:13
+             16	              1	int profilegc.main src/profilegc.d:14
+             16	              1	int[] profilegc.main src/profilegc.d:22
+             16	              1	int[] profilegc.main src/profilegc.d:37
+             16	              1	wchar[] profilegc.main src/profilegc.d:35
diff --git a/druntime/test/shared/src/load.d b/druntime/test/shared/src/load.d
index a36fcffefcc9..61d50f8e3799 100644
--- a/druntime/test/shared/src/load.d
+++ b/druntime/test/shared/src/load.d
@@ -8,6 +8,7 @@ version (linux) import core.sys.linux.dlfcn : RTLD_NOLOAD;
 version (NetBSD) import core.sys.netbsd.dlfcn : RTLD_NOLOAD;
 version (OSX) import core.sys.darwin.dlfcn : RTLD_NOLOAD;
 version (Solaris) import core.sys.solaris.dlfcn : RTLD_NOLOAD;
+version (Hurd) import core.sys.hurd.dlfcn : RTLD_NOLOAD;
 
 void* openLib(string s)
 {

From dc273d4cf4be9dc2a8892b70cb521dd233c7a18a Mon Sep 17 00:00:00 2001
From: Yelninei <yelninei@tutamail.com>
Date: Mon, 20 Apr 2026 15:02:46 +0000
Subject: [PATCH 3/3] druntime: Add version(linux) to linux/stdio.d.

---
 druntime/src/core/sys/linux/stdio.d | 1 +
 1 file changed, 1 insertion(+)

diff --git a/druntime/src/core/sys/linux/stdio.d b/druntime/src/core/sys/linux/stdio.d
index 1d18429b0362..6fbd7a0b505b 100644
--- a/druntime/src/core/sys/linux/stdio.d
+++ b/druntime/src/core/sys/linux/stdio.d
@@ -6,6 +6,7 @@
   * Authors: Danny Milosavljevic
   */
 module core.sys.linux.stdio;
+version (linux):
 version (CRuntime_Glibc):
 public import core.sys.posix.stdio;
 import core.sys.posix.sys.types : ssize_t, off64_t = off_t;