[Bug c++/12919] New: ICE: in default_pch_valid_p, at toplev.c:4235 during libstdc++-v3 build

["green at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12919

           Summary: ICE: in default_pch_valid_p, at toplev.c:4235 during
                    libstdc++-v3 build
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: green at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: sh64-elf

The tree-ssa sh64-elf toolchain fails to build in libstdc++-v3 like so...

`/opt/spindazzle/gnutools/build-X-sh64-elf/sh64-elf/ml/libstdc++-v3/scripts/testsuite_flags
--build-cxx` -DHAVE_CONFIG_H -I.
-I../../../../../src/HEAD-2003-11-05/libstdc++-v3/testsuite -I.. 
-I/opt/spindazzle/gnutools/build-X-sh64-elf/sh64-elf/ml/libstdc++-v3/include/sh64-elf
-I/opt/spindazzle/gnutools/build-X-sh64-elf/sh64-elf/ml/libstdc++-v3/include
-I/opt/spindazzle/gnutools/src/HEAD-2003-11-05/libstdc++-v3/libsupc++ -O2
-fno-builtin -g -O2  -g -O2  -ml -c -o testsuite_hooks.o
../../../../../src/HEAD-2003-11-05/libstdc++-v3/testsuite/testsuite_hooks.cc
<command line>:1: internal compiler error: in default_pch_valid_p, at toplev.c:4235
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