Hi! Jonathan reported and I've verified a In file included from ../../../libgcc/unwind-dw2.c:412: ./md-unwind-support.h:398:6: warning: no previous prototype for ‘ppc_backchain_fallback’ [-Wmissing-prototypes] 398 | void ppc_backchain_fallback (struct _Unwind_Context *context, void *a) | ^~~~~~~~~~~~~~~~~~~~~~ warning on powerpc*-linux* libgcc build.
All the other MD_* macro functions are static, so I think the following is the right thing rather than adding a previous prototype for ppc_backchain_fallback. Bootstrapped/regtested on powerpc64le-linux and powerpc64-linux (the latter with -m32/-m64 testing), ok for trunk? 2021-11-09 Jakub Jelinek <ja...@redhat.com> * config/rs6000/linux-unwind.h (ppc_back_fallback): Make it static, formatting fix. --- libgcc/config/rs6000/linux-unwind.h.jj 2021-10-15 11:59:16.227682621 +0200 +++ libgcc/config/rs6000/linux-unwind.h 2021-11-09 11:42:06.840353422 +0100 @@ -395,7 +395,8 @@ struct frame_layout }; -void ppc_backchain_fallback (struct _Unwind_Context *context, void *a) +static void +ppc_backchain_fallback (struct _Unwind_Context *context, void *a) { struct frame_layout *current; struct trace_arg *arg = a; Jakub