GCC build failure, HEAD@169371 on native

[regress]

With your recent patch, GCC HEAD revision 169371 had problems on:
native: build (about the same as the previous build)
Attached is build output for those targets.
The previous build was of revision 169370.

Log information for changes since the last build:
------------------------------------------------------------------------
r169371 | burnus | 2011-01-28 11:47:16 -0800 (Fri, 28 Jan 2011) | 6 lines
Changed paths:
   M /trunk/gcc/fortran/ChangeLog
   M /trunk/gcc/fortran/gfortran.texi

2011-01-28  Tobias Burnus  <burnus@net-b.de>

        * gfortran.texi (Fortran 2003 status): Mention support for
        nonconstant namelist variables.


------------------------------------------------------------------------

For more information, see <http://gcc.gnu.org/regtest/HEAD/>.

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checking whether g++ accepts -g... yes
checking for gnatbind... no
checking for gnatmake... no
checking whether compiler driver understands Ada... no
checking how to compare bootstrapped objects... cmp --ignore-initial=16 $$f1 $$f2
checking for objdir... .libs
checking for the correct version of gmp.h... yes
checking for the correct version of mpfr.h... yes
checking for the correct version of mpc.h... buggy but acceptable
checking for the correct version of the gmp/mpfr/mpc libraries... no
configure: error: Building GCC requires GMP 4.2+, MPFR 2.3.1+ and MPC 0.8.0+.
Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
their locations.  Source code for these libraries can be found at
their respective hosting sites as well as at
ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
http://gcc.gnu.org/install/prerequisites.html for additional info.  If
you obtained GMP, MPFR and/or MPC from a vendor distribution package,
make sure that you have installed both the libraries and the header
files.  They may be located in separate packages.
+ exit 1
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-- 
Geoffrey Keating <geoffk@apple.com> 
(via an automated GCC regression-testing script.)