Pass common compile options to the linker

Author: petrhosek

libc/cmake/modules/LLVMLibCTestRules.cmake

@@ -218,6 +218,8 @@ function(create_libc_unittest fq_target_name)
 
   _get_common_test_compile_options(compile_options "${LIBC_UNITTEST_C_TEST}"
                                    "${LIBC_UNITTEST_FLAGS}")
+  # TODO: Perhaps we should should we have a separate function for link options.
+  set(link_options ${compile_options})
   list(APPEND compile_options ${LIBC_UNITTEST_COMPILE_OPTIONS})
 
   if(SHOW_INTERMEDIATE_OBJECTS)
@@ -272,6 +274,7 @@ function(create_libc_unittest fq_target_name)
   target_include_directories(${fq_build_target_name} SYSTEM PRIVATE ${LIBC_INCLUDE_DIR})
   target_include_directories(${fq_build_target_name} PRIVATE ${LIBC_SOURCE_DIR})
   target_compile_options(${fq_build_target_name} PRIVATE ${compile_options})
+  target_link_options(${fq_build_target_name} PRIVATE ${compile_options})
 
   if(NOT LIBC_UNITTEST_CXX_STANDARD)
     set(LIBC_UNITTEST_CXX_STANDARD ${CMAKE_CXX_STANDARD})