Add config/gxx-include-dir.m4 (patch 3/4 for PR 7305)

[Alexandre Oliva]

On Nov 25, 2004, Richard Sandiford <rsandifo@redhat.com> wrote:

> 	* configure.in: Include config/gxx-include-dir.m4.  Use
> 	TL_AC_GXX_INCLUDE_DIR.  Remove some now-redundant AC_SUBSTs.
> 	* configure: Regenerate.

> config/
> 	* gxx-include-dir.m4: New file.

Looks good, but shouldn't gcc/ and libstdc++-v3/ use it as well?  Or
was this for 4/4, that I seem to not have received?

In case it wasn't clear: ok, please check it in :-)

-- 
Alexandre Oliva             http://www.ic.unicamp.br/~oliva/
Red Hat Compiler Engineer   aoliva@{redhat.com, gcc.gnu.org}
Free Software Evangelist  oliva@{lsd.ic.unicamp.br, gnu.org}