https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91092
--- Comment #13 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> --- By "implicit function declarations", does this include K&R style declarations? I've found out a few days ago that GMP still uses K&R style declarations, and that's in a configure script. The issue is that there is a potential type mismatch between the caller (long) and the callee (unsigned int), and GCC fails to generate "correct" code in such a case.
