https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120881
--- Comment #17 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to H.J. Lu from comment #16) > SHRINK_WRAPPING_ENABLED is for checking if shrink wrapping is enabled. True, but we could place mcount at entry only for functions where it is strictly required. IIRC, shrink-wrapping is always enabled on x86, so this effectively forces -fentry. Perhaps a better approach is to error out for -fstack-protector-all -pg without -fentry.
