https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064
Jim Wilson <wilson at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |wilson at gcc dot gnu.org
--- Comment #1 from Jim Wilson <wilson at gcc dot gnu.org> ---
I tracked the problem down to bug 27880 comment 31.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27880#c31
The patch is arguably correct, but it changes config.in from
#undef HAVE_GETIPINFO
to
#ifndef USED_FOR_TARGET
#undef HAVE_GETIPINFO #undef HAVE_GETIPINFO
#endif
config.in is used to generate auto-host.h, which is included by unwind-c.c.
But the new ifndef prevents HAVE_GETIPINFO from being defined in unwind-c.c, as
USED_FOR_TARGET is defined in tconfig.h before auto-host.h is included.
Now that we have an auto-target.h file in libgcc, we can fix the problem by
including that.
This was OK in gcc-4.3, and broken in gcc-4.4 and later. The libgcc
auto-target.h file appeared in gcc-4.8. So fixing gcc-4.4 to gcc-4.7 looks a
bit complicated, but anything gcc-4.8 and later looks easy to fix. We of
course only care about gcc 5 and later at this point.
