https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064
--- Comment #2 from Jim Wilson <wilson at gcc dot gnu.org> --- The old configure.ac before the patch breaks this has GCC_TARGET_TEMPLATE(HAVE_GETIPINFO) which prevents the ifndef/endif from being added to config.in. But this apparently only works in the gcc dir, and I don't think it can be used after the changes made by the patch as the configure check moved into the config/unwind_ipinfo.m4 file. Including auto-target.h seems to be the simpler fix.
