[Bug preprocessor/82939] genmatch fills up terminal with endless printing of periods

["egallager at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82939

--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #6)
> Hmm, somehow I remember reports similar to this on Darwin.  Can you try
> using clang for bootstrap?
> 
> What X-Code version are you using on which OS version?
> 
> The crash reporter suggests sth goes wrong with linking as it seems to crash
> during init already.

I'm using Xcode 3.2.6 on Snow Leopard. Using the system clang fails earlier in
configure but I think that's because I screwed up my system headers on this
system:

configure: error: uint64_t or int64_t not found
make[2]: *** [configure-stage1-gcc] Error 1
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2

clang 5.0 from MacPorts fails in libbacktrace with:

libtool: link: rm -fr  .libs/libbacktrace.a .libs/libbacktrace.la
libtool: link: ar rc .libs/libbacktrace.a .libs/atomic.o .libs/dwarf.o
.libs/fileline.o .libs/posix.o .libs/print.o .libs/sort.o .libs/state.o
.libs/backtrace.o .libs/simple.o .libs/unknown.o .libs/mmapio.o .libs/mmap.o 
ranlib: object: .libs/libbacktrace.a(dwarf.o) malformed object (unknown load
command 1)
ar: internal ranlib command failed
make[4]: *** [libbacktrace.la] Error 1
make[3]: *** [all] Error 2
make[2]: *** [all-stage1-libbacktrace] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2

...which is probably an issue I should raise with MacPorts instead.

It works when I use a previous version of gcc I built myself though. (8.0 from
20170525)