https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97445
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> --- -fno-allow-store-data-races is fairly new option, previously it has been --param=allow-store-data-races=0 I have no idea how you've tried to add -save-temps, so can't answer why you get the error. What I was suggesting is build with make V=1 and copy/paste the command line used to compile a particular source file and append -save-temps to those options