Run embedding API tests on Linux

With this change, we link pthreads properly in the embedding API tests
on Linux, locate the CoreCLR runtime properly, and run the tests on CI.

Author: Josh Peterson

.yamato/scripts/test_linux.sh

@@ -27,14 +27,14 @@ echo
 
 echo
 echo "***********************************"
-echo "Unity: Skipping embedding API tests"
+echo "Unity: Running embedding API tests"
 echo "***********************************"
 echo
-# cd unity/embed_api_tests
-# cmake -DCMAKE_BUILD_TYPE=$configuration .
-# cmake --build .
-# ./mono_test_app
-# cd ../../
+cd unity/embed_api_tests
+cmake -DCMAKE_BUILD_TYPE=$configuration .
+cmake --build .
+./mono_test_app
+cd ../../
 
 echo
 echo "**********************************"

unity/embed_api_tests/CMakeLists.txt

@@ -10,5 +10,8 @@ include_directories(${CLR_DIR}/src/inc)
 
 add_executable(${PROJECT_NAME_STR} ${PROJECT_SRC_FILES})
 target_link_libraries(${PROJECT_NAME_STR} ${CMAKE_DL_LIBS})
+if(UNIX AND NOT APPLE)
+    target_link_libraries(${PROJECT_NAME_STR} pthread)
+endif()
 target_compile_features(${PROJECT_NAME_STR} PRIVATE cxx_range_for)
 target_compile_definitions(${PROJECT_NAME_STR} PRIVATE ENABLE_MONO=1 PLATFORM_STANDALONE=1)

unity/embed_api_tests/main.cpp

@@ -18,10 +18,10 @@
 #define UNITY_EDITOR 1
 #define USE_CORECLR
 
-// On macOS the compiler does not define _DEBUG, but CMake defines
+// On macOS and Linux the compiler does not define _DEBUG, but CMake defines
 // NDEBUG for release builds, so if NDEBUG is not defined, assume this
 // is a debug build and define _DEBUG.
-#if defined(__APPLE__)
+#if defined(__APPLE__) || defined(__linux__)
 #ifndef NDEBUG
 #define _DEBUG
 #endif
@@ -89,6 +89,7 @@ void* get_handle()
         if(s_MonoLibrary == nullptr)
         {
             assert(false && "Failed to load mono\n");
+            printf("Failed to load mono from '%s'\n", g_monoDllPath.c_str());
             exit(1);
         }
     }
@@ -2439,8 +2440,13 @@ void SetupMono(Mode mode)
 #endif // __aarch64__
 #endif
 #elif defined(__linux__)
-        monoLibFolder = "/usr/share/dotnet/shared/Microsoft.NETCore.App/3.1.0";
-        g_monoDllPath = "../../bin/Product/Linux.x64.Debug/libcoreclr.so";
+#if defined(_DEBUG)
+        monoLibFolder = abs_path_from_file("../../artifacts/bin/microsoft.netcore.app.runtime.linux-x64/Debug/runtimes/linux-x64/lib/net7.0");
+        g_monoDllPath = abs_path_from_file("../../artifacts/bin/microsoft.netcore.app.runtime.linux-x64/Debug/runtimes/linux-x64/native/libcoreclr.so");
+#else
+        monoLibFolder = abs_path_from_file("../../artifacts/bin/microsoft.netcore.app.runtime.linux-x64/Release/runtimes/linux-x64/lib/net7.0");
+        g_monoDllPath = abs_path_from_file("../../artifacts/bin/microsoft.netcore.app.runtime.linux-x64/Release/runtimes/linux-x64/native/libcoreclr.so");
+#endif
 #elif defined(WIN32)
 #if defined(_DEBUG)
 #ifdef _M_AMD64