[Bug debug/68771] Darwin: Profile guided optimisation with cold sections and invalid symbol redefinition

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68771

--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Daniel Vollmer from comment #6)
> Is 7.4 or 8.3 new enough to be worthwhile trying?

The specific thing you reported should be fixed on both of those branches.

General support for LTO debug is not (I have patches for the GCC part, but some
changes are also needed to dsymutil and not had a chance to do those yet).