https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89249
--- Comment #5 from Liviu Ionescu <ilg at livius dot net> --- The patch is wrong, it should read: #if defined (__MINGW32__) // Win32 fails to CreateProcess if spaces are escaped. #else lto_wrapper_file = convert_white_space (lto_wrapper_file); #endif