[Bug libgcc/78064] New: unwind-c.c never users _Unwind_GetIPInfo

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064

            Bug ID: 78064
           Summary: unwind-c.c never users _Unwind_GetIPInfo
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: fw at gcc dot gnu.org
          Reporter: fw at gcc dot gnu.org
  Target Milestone: ---

unwind-c.c use a HAVE_GETIPINFO preprocessor conditional, but never includes
auto-target.h, so the macro is always undefined.  As a result,
_Unwind_GetIPInfo is never used.

This causes:

  https://sourceware.org/bugzilla/show_bug.cgi?id=20719

Mailing list discussion:

  https://gcc.gnu.org/ml/gcc/2016-10/msg00165.html