GCC build failure, HEAD@155025 on native

[GCC regression tester]

With your recent patch, GCC HEAD revision 155025 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 155024.

Log information for changes since the last build:
------------------------------------------------------------------------
r155025 | rth | 2009-12-06 15:59:52 -0800 (Sun, 06 Dec 2009) | 3 lines
Changed paths:
   M /trunk/gcc/ChangeLog
   A /trunk/gcc/testsuite/gcc.c-torture/compile/pr42234.c
   M /trunk/gcc/tree-ssa-dom.c

	PR debug/42234
	* tree-ssa-dom.c (degenerate_phi_result): Check for NULL phi
	argument earlier.
------------------------------------------------------------------------

For more information, see <http://glutton.geoffk.org/HEAD/>.

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checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
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 correct version of gmp.h... yes
checking for correct version of mpfr.h... yes
checking for the correct version of mpc.h... no
configure: error: Building GCC requires GMP 4.2+, MPFR 2.3.2+ 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@geoffk.org> 
(via an automated GCC regression-testing script.)