[tsan] Set Darwin specific linker and compiler flags for tsan tests

[zaks.anna]

Summary

We are missing these flags for tsan tests as well. This can cause the Unit tests to be built with a different SDK version than that was used to build the runtime.

(Similar to https://reviews.llvm.org/D25352)

[Eugene.Zelenko]

Committed in rL285255.

lib/tsan/tests/CMakeLists.txt

 include_directories(../rtl)
 
 add_custom_target(TsanUnitTests)
 set_target_properties(TsanUnitTests PROPERTIES
   FOLDER "TSan unittests")
 
 set(TSAN_UNITTEST_CFLAGS
   ${TSAN_CFLAGS}
   ${COMPILER_RT_UNITTEST_CFLAGS}
   ${COMPILER_RT_GTEST_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/tsan/rtl
   -DGTEST_HAS_RTTI=0)
 
+if(APPLE)
+  list(APPEND TSAN_UNITTEST_CFLAGS ${DARWIN_osx_CFLAGS})
+endif()
+
 set(TSAN_RTL_HEADERS)
 foreach (header ${TSAN_HEADERS})
   list(APPEND TSAN_RTL_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/../${header})
 endforeach()
 
 # tsan_compile(obj_list, source, arch, {headers})
 macro(tsan_compile obj_list source arch)
   get_filename_component(basename ${source} NAME)
foreach(arch ${TSAN_TEST_ARCH})
         list(APPEND TEST_OBJECTS lib${TSAN_TEST_RUNTIME}.a)
         list(APPEND TEST_DEPS ${TSAN_TEST_RUNTIME})
         # Intentionally do *not* link with `-fsanitize=thread`. We already link
         # against a static version of the runtime, and we don't want the dynamic
         # one.
         add_compiler_rt_test(TsanUnitTests "${testname}-${arch}-Test"
                 OBJECTS ${TEST_OBJECTS}
                 DEPS ${TEST_DEPS}
-                LINK_FLAGS ${TARGET_LINK_FLAGS}
+                LINK_FLAGS ${TARGET_LINK_FLAGS} ${DARWIN_osx_LINKFLAGS}
                            -lc++)
       endif()
     endforeach()
   endif()
 endmacro()
 
 if(COMPILER_RT_CAN_EXECUTE_TESTS)
   add_subdirectory(rtl)
   add_subdirectory(unit)
 endif()