program_suffix .exe obj_suffix o static_suffix a install_root /mingw header_dir include lib_dir lib doc_dir share/doc # see https://sourceforge.net/p/mingw-w64/bugs/755/ use_stack_protector no _WIN32_WINNT=0x0600 msys mingw32.* win32 rtlgenrandom virtual_lock atomics threads thread_local filesystem certificate_store