[compiler-rt][tests] Propagate COMPILER_RT_UNITTEST_LINK_FLAGS

[hubert.reinterpretcast]

Summary

COMPILER_RT_UNITTEST_LINK_FLAGS is dropped in many places, unlike COMPILER_RT_UNITTEST_CFLAGS. This patch attempts to remove that inconsistency.
Previously reviewed as part of D58951.

[peter.smith]

I checked with the original introduction of the support for COMPILER_RT_UNITTEST_LINKFLAGS in https://reviews.llvm.org/D16165 and this looks like it is consistent with that. In the original patch it looks like it was fixing a specific link failure, which I think is why it didn't get propagated to the other files. Unless there are any objections I'm inclined to approve this?

[sfertile]

LGTM

lib/interception/tests/CMakeLists.txt

set(INTERCEPTION_TEST_CFLAGS_COMMON
   -I${COMPILER_RT_SOURCE_DIR}/include
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/interception
   -fno-rtti
   -O2
   -Werror=sign-compare
   -Wno-non-virtual-dtor)
 
+set(INTERCEPTION_TEST_LINK_FLAGS_COMMON
+  ${COMPILER_RT_UNITTEST_LINK_FLAGS})
+
 # -gline-tables-only must be enough for these tests, so use it if possible.
 if(COMPILER_RT_TEST_COMPILER_ID MATCHES "Clang")
   list(APPEND INTERCEPTION_TEST_CFLAGS_COMMON -gline-tables-only)
 else()
   list(APPEND INTERCEPTION_TEST_CFLAGS_COMMON -g)
 endif()
 if(MSVC)
   list(APPEND INTERCEPTION_TEST_CFLAGS_COMMON -gcodeview)

lib/msan/tests/CMakeLists.txt

 
 set(MSAN_UNITTEST_INSTRUMENTED_CFLAGS
   ${MSAN_UNITTEST_COMMON_CFLAGS}
   -fsanitize=memory
   -fsanitize-memory-track-origins
   -mllvm -msan-keep-going=1
 )
 set(MSAN_UNITTEST_LINK_FLAGS
+  ${COMPILER_RT_UNITTEST_LINK_FLAGS}
   -fsanitize=memory
   # Don't need -stdlib=libc++ because we explicitly list libc++.a in the linker
   # inputs.
 )
 
 append_list_if(COMPILER_RT_HAS_LIBDL -ldl MSAN_UNITTEST_LINK_FLAGS)
 
 macro(msan_compile obj_list source arch kind cflags)
macro(msan_link_shared so_list so_name arch kind)
   cmake_parse_arguments(SOURCE "" "" "OBJECTS;LINK_FLAGS;DEPS" ${ARGN})
   set(output_so "${CMAKE_CURRENT_BINARY_DIR}/${so_name}.${arch}${kind}.so")
   get_target_flags_for_arch(${arch} TARGET_LINK_FLAGS)
   if(NOT COMPILER_RT_STANDALONE_BUILD)
     list(APPEND SOURCE_DEPS msan)
   endif()
   clang_link_shared(${output_so}
                 OBJECTS ${SOURCE_OBJECTS}
-                LINK_FLAGS ${TARGET_LINK_FLAGS} ${SOURCE_LINK_FLAGS}
+                LINK_FLAGS ${COMPILER_RT_UNITTEST_LINK_FLAGS} ${TARGET_LINK_FLAGS} ${SOURCE_LINK_FLAGS}
                 DEPS ${SOURCE_DEPS})
   list(APPEND ${so_list} ${output_so})
 endmacro()
 
 # Main MemorySanitizer unit tests.
 add_custom_target(MsanUnitTests)
 set_target_properties(MsanUnitTests PROPERTIES FOLDER "MSan unit tests")
 

lib/sanitizer_common/tests/CMakeLists.txt

set(SANITIZER_TEST_CFLAGS_COMMON
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/sanitizer_common
   -fno-rtti
   -O2
   -Werror=sign-compare
   -Wno-non-virtual-dtor
   -Wno-gnu-zero-variadic-macro-arguments)
 
+set(SANITIZER_TEST_LINK_FLAGS_COMMON ${COMPILER_RT_UNITTEST_LINK_FLAGS})
+
 # -gline-tables-only must be enough for these tests, so use it if possible.
 if(COMPILER_RT_TEST_COMPILER_ID MATCHES "Clang")
   list(APPEND SANITIZER_TEST_CFLAGS_COMMON -gline-tables-only)
 else()
   list(APPEND SANITIZER_TEST_CFLAGS_COMMON -g)
 endif()
 if(MSVC)
   list(APPEND SANITIZER_TEST_CFLAGS_COMMON -gcodeview)

lib/scudo/standalone/tests/CMakeLists.txt

set(SCUDO_UNITTEST_CFLAGS
   -I${COMPILER_RT_SOURCE_DIR}/include
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/scudo/standalone
   -DGTEST_HAS_RTTI=0)
 
 set(SCUDO_TEST_ARCH ${SCUDO_STANDALONE_SUPPORTED_ARCH})
 
 # gtests requires c++
-set(LINK_FLAGS)
+set(LINK_FLAGS ${COMPILER_RT_UNITTEST_LINK_FLAGS})
 foreach(lib ${SANITIZER_TEST_CXX_LIBRARIES})
   list(APPEND LINK_FLAGS -l${lib})
 endforeach()
 list(APPEND LINK_FLAGS -pthread)
 
 set(TEST_HEADERS)
 foreach (header ${SCUDO_HEADERS})
   list(APPEND TEST_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/../${header})

lib/tsan/tests/CMakeLists.txt

set(TSAN_UNITTEST_CFLAGS
   ${COMPILER_RT_GTEST_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/include
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/tsan/rtl
   -DGTEST_HAS_RTTI=0)
 
 set(TSAN_TEST_ARCH ${TSAN_SUPPORTED_ARCH})
 
-set(LINK_FLAGS)
+set(LINK_FLAGS ${COMPILER_RT_UNITTEST_LINK_FLAGS})
 foreach(lib ${SANITIZER_TEST_CXX_LIBRARIES})
   list(APPEND LINK_FLAGS -l${lib})
 endforeach()
 
 if(APPLE)
 
   # Create a static library for test dependencies.
   set(TSAN_TEST_RUNTIME_OBJECTS

lib/xray/tests/CMakeLists.txt

if(APPLE)
     set(tgt_name "RTXRay.test.osx")
   else()
     set(tgt_name "RTXRay.test.${arch}")
   endif()
   set(${lib} "${tgt_name}" PARENT_SCOPE)
 endfunction()
 
 set(XRAY_TEST_ARCH ${XRAY_SUPPORTED_ARCH})
-set(XRAY_UNITTEST_LINK_FLAGS ${CMAKE_THREAD_LIBS_INIT})
+set(XRAY_UNITTEST_LINK_FLAGS
+  ${COMPILER_RT_UNITTEST_LINK_FLAGS}
+  ${CMAKE_THREAD_LIBS_INIT}
+  )
 
 if (NOT APPLE)
   # Needed by LLVMSupport.
   append_list_if(
     COMPILER_RT_HAS_TERMINFO
     -l${COMPILER_RT_TERMINFO_LIB} XRAY_UNITTEST_LINK_FLAGS)
 
   if (COMPILER_RT_STANDALONE_BUILD)