[Bug target/119386] [14/15 Regression][x64] Shared libraries can no longer be compiled with profiling

[amonakov at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119386

--- Comment #25 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Ard Biesheuvel from comment #24)
> - never emit 'call mcount'
> - emit 'call *mcount@GOTPCREL(%rip)' if -fno-plt
> - emit 'call mcount@PLT' otherwise

As discussed, gcc was always using GOT indirection for mcount since the
beginning, so the above would be a substantial change.