On Mar 22, 2021, at 17:56, Jeffrey Walton wrote: > It looks like this is an Autotools problem. Autotools should test if > ccp works as expected, and avoid cpp if it does not. Autotools should > not break the build. > > Perl works around Apple's cpp: > https://github.com/Perl/perl5/blob/blead/hints/darwin.sh#L131.
You're referring to the part of their code that adds -no-cpp-precomp if the compiler accepts it? The last version of Apple gcc that did anything in response to -no-cpp-precomp was Apple gcc 3.1. Apple gcc 3.3 and later do nothing in response to -no-cpp-precomp. That flag is ancient history.
