macro_name XLC binary_name xlC output_to_option "-o " add_include_dir_option -I add_lib_dir_option -L add_lib_option -l compile_flags "-c" debug_info_flags "-g" optimization_flags "-O2" lang_flags "-std=c++11" makefile_style gmake power8 -> "-qarch=pwr8" power9 -> "-qarch=pwr9" altivec -> "-qaltivec" default -> "$(CXX) -qmkshrobj"