[PATCH] Use toplevel configure for GMP and MPFR for gdb

[Tom Tromey]

>>>>> "Andrew" == apinski--- via Gcc-patches <gcc-patches@gcc.gnu.org> writes:

Andrew> From: Andrew Pinski <apinski@marvell.com>
Andrew> This patch uses the toplevel configure parts for GMP/MPFR for
Andrew> gdb. The only thing is that gdb now requires MPFR for building.
Andrew> Before it was a recommended but not required library.
Andrew> Also this allows building of GMP and MPFR with the toplevel
Andrew> directory just like how it is done for GCC.
Andrew> We now error out in the toplevel configure of the version
Andrew> of GMP and MPFR that is wrong.

Thank you for doing this.  It's been on my to-do list to investigate
this for quite a while, but I never got to it... :(

One larger question I have is whether we should land this now, or wait
until after GDB 13 branches.  That is coming soon and maybe it's not
good to add a new dependency just before the release.

My inclination would be to defer it, I suppose out of conservatism, but
I'd appreciate hearing from others.

I think gdb/README and gdb/doc/gdb.texinfo need some minor changes,
because the GMP-related configure options are being renamed.

The commit message should mention "PR build/28500" somewhere so that the
commit is logged to bugzilla.  Also in gdb we've been using a "Bug:"
trailer in the commit message that has the full URL of the bug.
IIUC this does fix that PR.

Tom