[Bug bootstrap/84153] Bootstrap failure when using dependency libraries in non-system location

["bneumeier at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84153

--- Comment #4 from Brett Neumeier <bneumeier at gmail dot com> ---
Created attachment 43324
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43324&action=edit
Patch to add rpath for GMP, MPC, MPFR, ISL when needed

OK. I'm just going to leave this patch here -- tested and verified to resolve
my issues I'm having -- for anyone else who runs across this problem and
happens to check the gcc bugzilla to see if it's a known problem.

I was interested to see that the GMP, MPC, MPFR, and ISL configure scripts all
have logic to add RPATHs as well, although the logic there is a good deal more
complicated than this. So at least I'm in good company thinking it's The Right
Thing to do.

Cheers!