https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93469
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Karen from comment #4) > Here the additional info: > > GCC version: Apple clang version 11.0.0 (clang-1100.0.33.16) > Target: x86_64-apple-darwin19.2.0 > Configured with: --prefix=/Library/Developer/CommandLineTools/usr > --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/ > usr/include/c++/4.2.1 That confirms you're using OS X, but it's not the compiler you're using. For your case you need to provide the output of 'g++-9 -v' since that's the compiler you're reporting a bug for.