[compiler-rt] [CMake] [compiler-rt] fix architecture checks in runtime builds (PR #66374)

[Sebastian Poeplau via llvm-commits]

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@@ -124,15 +125,9 @@ macro(test_target_arch arch def)
                        SOURCE "#include <limits.h>\nint foo(int x, int y) { return x + y; }\n"
                        FLAGS ${TARGET_${arch}_CFLAGS})
     else()
-      set(FLAG_NO_EXCEPTIONS "")
-      if(COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG)
-        set(FLAG_NO_EXCEPTIONS " -fno-exceptions ")
-      endif()
       set(SAVED_CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS})
       set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${argstring}")
-      try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
-                  COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS} ${FLAG_NO_EXCEPTIONS}"
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sebastianpoeplau wrote:

I think I tried, mirroring the code in CMake's implementation of `check_cxx_source_compiles`, which passes the flags as compile definitions. There was some sort of problem, but I can't remember now what it was :thinking: 

https://github.com/llvm/llvm-project/pull/66374