add android build to ci

.azure/templates/build-test.yml

@@ -137,11 +137,16 @@ steps:
         prefix_path="${BUILD_SOURCESDIRECTORY}/build-sharedlibs/install:${prefix_path}"
         crosscompiling="-DCMAKE_CROSSCOMPILING=1 -DCMAKE_SYSTEM_NAME=${AGENT_OS}"
       fi
+      androidparams=
+      if [[ "${ANDROID:-off}" == "on" ]] ; then
+        androidparams="-DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK/build/cmake/android.toolchain.cmake -DANDROID_ABI=${ARCH} -DANDROID_PLATFORM=${ANDROID_PLATFORM} -DANDROID_NDK=$ANDROID_NDK"
+      fi
       cmake -DCMAKE_BUILD_TYPE=${BUILD_TYPE} \
             -DCMAKE_INSTALL_PREFIX=install \
             -DCMAKE_PREFIX_PATH="${prefix_path//:/;}" \
             -DBUILD_SHARED_LIBS=${SHAREDLIBS:-on} \
             ${crosscompiling} \
+            ${androidparams} \
             -DANALYZER=${ANALYZER:-off} \
             -DSANITIZER=${SANITIZER:-none} \
             -DENABLE_SSL=${SSL:-on} \
@@ -154,10 +159,11 @@ steps:
             -DENABLE_TOPIC_DISCOVERY=${TOPIC_DISCOVERY:-on} \
             -DENABLE_COVERAGE=${COVERAGE:-off} \
             -DENABLE_ICEORYX=${ICEORYX:-off} \
-            -DBUILD_DDSPERF=on \
             -DBUILD_TESTING=${TESTING:-on} \
+            -DBUILD_IDLC=${IDLC:-on} \
             -DBUILD_IDLC_XTESTS=${IDLC_XTESTS:-on} \
-            -DBUILD_EXAMPLES=on \
+            -DBUILD_EXAMPLES=${EXAMPLES:-on} \
+            -DBUILD_DDSPERF=${DDSPERF:-on} \
             -DWERROR=on \
             ${GENERATOR:+-G} "${GENERATOR}" -A "${PLATFORM}" -T "${TOOLSET}" ..
       ${SCAN_BUILD} cmake --build . --config ${BUILD_TYPE} --target install -- ${BUILD_TOOL_OPTIONS}
@@ -177,6 +183,7 @@ steps:
       ${SHELL} ../src/tools/ddsperf/sanity.bash
     name: sanity_ddsperf
     displayName: Sanity check ddsperf
+    condition: eq(variables['android'], 'off')
   - bash: |
       set -e -x
       cd build
@@ -191,7 +198,7 @@ steps:
             ${GENERATOR:+-G} "${GENERATOR}" -A "${PLATFORM}" -T "${TOOLSET}" "${INSTALLPREFIX}/share/CycloneDDS/examples/helloworld"
       cmake --build . --config ${BUILD_TYPE} -- ${BUILD_TOOL_OPTIONS}
       ${SHELL} ../../scripts/sanity_helloworld.bash
-    condition: ne(variables['sharedlibs'], 'off')
+    condition: and(ne(variables['sharedlibs'], 'off'), eq(variables['android'], 'off'))
     name: sanity_hello_world
     displayName: Sanity check Hello World
   - bash: |
@@ -203,7 +210,7 @@ steps:
       test -e $d/symbol_export_test
       [[ "${BUILD_TYPE}" == 'Release' ]] || [[ "${AGENT_OS}" == 'Windows_NT' ]] || \
         ${SHELL} ../scripts/check_symbol_export.bash $d/symbol_export_test
-    condition: eq(variables['testing'], 'off')
+    condition: and(eq(variables['testing'], 'off'), eq(variables['android'], 'off'))
     name: sanity_symbol_export
     displayName: Sanity check export symbols
   - bash: |

.gitignore

@@ -6,4 +6,5 @@ gen.*
 .vs/
 .vscode/
 build/
+build*/
 *~

azure-pipelines.yml

@@ -129,6 +129,19 @@ jobs:
         build_type: Release
         sharedlibs: off
         iceoryx: on
+      'Android 13 with API level 33 (Release, armv8)':
+        image: ubuntu-24.04
+        build_type: Release
+        sanitizer: undefined
+        testing: off
+        examples: off
+        idlc: off
+        idlc_xtests: off
+        android: on
+        android_platform: android-33
+        arch: arm64-v8a
+        ssl: off
+        ddsperf: off
 
   steps:
     - template: /.azure/templates/build-test.yml

src/core/ddsi/src/ddsi_udp.c

@@ -118,7 +118,7 @@ static void translate_pktinfo (struct ddsi_network_packet_info *pktinfo, ddsrt_m
         pktinfo->dst.kind = DDSI_LOCATOR_KIND_UDPv6;
         pktinfo->dst.port = port;
         memcpy (pktinfo->dst.address, &pkt6->ipi6_addr, 16);
-        pktinfo->if_index = pkt6->ipi6_ifindex;
+        pktinfo->if_index = (uint32_t)pkt6->ipi6_ifindex;
         return;
       }
     }
@@ -751,6 +751,8 @@ static int joinleave_asm_mcgroup (ddsrt_socket_t socket, int join, const ddsi_lo
     ipv6mreq.ipv6mr_multiaddr = mcip.a6.sin6_addr;
 #if __ZEPHYR__
     ipv6mreq.ipv6mr_ifindex = interf ? interf->if_index : 0;
+#elif __ANDROID__
+    ipv6mreq.ipv6mr_interface = interf ? (int)interf->if_index : 0;
 #else
     ipv6mreq.ipv6mr_interface = interf ? interf->if_index : 0;
 #endif

src/ddsrt/src/ifaddrs/posix/ifaddrs.c

@@ -193,7 +193,11 @@ static bool is_the_kernel_likely_lying_about_multicast (const ddsrt_ifaddrs_t *i
     mcaddr.ipv6.sin6_port = bindaddr.ipv6.sin6_port;
     memset (&ipv6mreq, 0, sizeof (ipv6mreq));
     ipv6mreq.ipv6mr_multiaddr = mcaddr.ipv6.sin6_addr;
+#ifdef __ANDROID__
+    ipv6mreq.ipv6mr_interface = (int)ifa->index;
+#else
     ipv6mreq.ipv6mr_interface = ifa->index;
+#endif
     if (setsockopt (sock, IPPROTO_IPV6, IPV6_JOIN_GROUP, &ipv6mreq, sizeof (ipv6mreq)) != 0 ||
         setsockopt (sock, IPPROTO_IPV6, IPV6_MULTICAST_IF, &ifa->index, sizeof (ifa->index)) != 0 ||
         setsockopt (sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hops, sizeof (hops)) != 0)