cmake COMPILER_RT_HAS_WERROR_FLAG examples

Lewuathe/mlir-hello thirdparty/llvm-project/compiler-rt/cmake/config-ix.cmake :136

check_cxx_compiler_flag(-Werror COMPILER_RT_HAS_WERROR_FLAG)

trailofbits/polytracker polytracker/src/compiler-rt/cmake/config-ix.cmake :100

check_cxx_compiler_flag(-Werror COMPILER_RT_HAS_WERROR_FLAG)

CTSRD-CHERI/cheribsd contrib/subrepo-cheri-compiler-rt/cmake/config-ix.cmake :114

check_cxx_compiler_flag(-Werror COMPILER_RT_HAS_WERROR_FLAG)