[xxhash] simplify

Co-authored-by: ferdymercury <ferdymercury@users.noreply.github.com>

Author: ferdymercury

builtins/xxhash/CMakeLists.txt

@@ -46,6 +46,7 @@ ExternalProject_Add(
 
 file(MAKE_DIRECTORY ${ROOT_XXHASH_PREFIX}/include)
 add_library(xxHash::xxHash IMPORTED STATIC GLOBAL)
+add_dependencies(xxHash::xxHash BUILTIN_XXHASH)
 set_target_properties(xxHash::xxHash PROPERTIES
     IMPORTED_LOCATION ${ROOT_XXHASH_LIBRARY}
     INTERFACE_INCLUDE_DIRECTORIES ${ROOT_XXHASH_PREFIX}/include)

cmake/modules/SearchInstalledSoftware.cmake

@@ -313,6 +313,7 @@ endif()
 #---Check for xxHash-----------------------------------------------------------------
 ROOT_FIND_REQUIRED_DEP(xxHash builtin_xxhash)
 if(builtin_xxhash)
+  list(APPEND ROOT_BUILTINS xxHash)
   add_subdirectory(builtins/xxhash)
 endif()
 

core/lz4/CMakeLists.txt

@@ -9,9 +9,6 @@ find_package(LZ4 REQUIRED)
 if(builtin_lz4)
     add_dependencies(Core BUILTIN_LZ4)
 endif()
-if(builtin_xxhash)
-    add_dependencies(Core BUILTIN_XXHASH)
-endif()
 
 target_sources(Core PRIVATE src/ZipLZ4.cxx)
 target_link_libraries(Core PRIVATE xxHash::xxHash LZ4::LZ4)