[Bug gcov-profile/120881] [16 Regression] -pg may not call mount at function entry by r16-1550-g9244ea4bf55638

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120881

--- Comment #26 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Sam James from comment #25)
> (In reply to H.J. Lu from comment #24)
> > Created attachment 61789 [details]
> > A patch to add --enable-x86-64-mfentry
> 
> When wouldn't we want this enabled? Is it just a configure option because of
> a small risk of regressions?
> 

Support very old distroes or other OSes without __fentry__?