cmake GCC_HAS_BIDI_CHARS_FLAG examples

root-project/root graf2d/mathtext/CMakeLists.txt :22 

check_cxx_compiler_flag(-Wbidi-chars=none GCC_HAS_BIDI_CHARS_FLAG)

root-project/root graf2d/postscript/CMakeLists.txt :34 

check_cxx_compiler_flag(-Wbidi-chars=none GCC_HAS_BIDI_CHARS_FLAG)