GCC build failure, HEAD@174840 on native

[regress]

With your recent patch, GCC HEAD revision 174840 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 174836.

Log information for changes since the last build:
------------------------------------------------------------------------
r174837 | ro | 2011-06-09 00:08:00 -0700 (Thu, 09 Jun 2011) | 15 lines
Changed paths:
   M /trunk/gcc/ChangeLog
   M /trunk/gcc/config/i386/i386.c
   M /trunk/gcc/config/rs6000/rs6000.c
   M /trunk/gcc/configure
   M /trunk/gcc/configure.ac
   M /trunk/gcc/dwarf2asm.c

	* configure.ac (gcc_cv_as_hidden): Enable on *-*-darwin*.
	(gcc_cv_ld_hidden): Likewise.
	* configure: Regenerate.
	* config/i386/i386.c (USE_HIDDEN_LINKONCE): Remove TARGET_MACHO.
	(ix86_stack_protect_fail): Mark unused.
	(TARGET_STACK_PROTECT_FAIL) [TARGET_MACHO]: Don't redefine.
	* config/rs6000/rs6000.c (rs6000_assemble_visibility)
	[TARGET_MACHO]: Don't define.
	(TARGET_ASM_ASSEMBLE_VISIBILITY): Likewise.
	(TARGET_STACK_PROTECT_FAIL): Likewise.
	(rs6000_stack_protect_fail): Mark unused.
	* dwarf2asm.c (dw2_output_indirect_constant_1): Mark decl hidden if
	USE_LINKONCE_INDIRECT.
	Don't emit .hidden expicitly.

------------------------------------------------------------------------
r174838 | ro | 2011-06-09 00:31:44 -0700 (Thu, 09 Jun 2011) | 7 lines
Changed paths:
   M /trunk/libgcc/ChangeLog
   M /trunk/libgcc/config.host

2011-06-09  David S. Miller  <davem@davemloft.net>
	    Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* config.host (sparc-*-linux*): Correct md_unwind_header
	filename.
	(s390x-ibm-tpf*): Fix typo.

------------------------------------------------------------------------
r174839 | jakub | 2011-06-09 00:46:28 -0700 (Thu, 09 Jun 2011) | 7 lines
Changed paths:
   M /trunk/gcc/ChangeLog
   M /trunk/gcc/dce.c
   M /trunk/gcc/testsuite/ChangeLog
   A /trunk/gcc/testsuite/gfortran.dg/pr49308.f90

	PR middle-end/49308
	* dce.c (reset_unmarked_insns_debug_uses): Avoid shadowing insn
	variable.  After resetting and rescanning insn continue with previous
	statement.

	* gfortran.dg/pr49308.f90: New test.

------------------------------------------------------------------------
r174840 | paolo | 2011-06-09 01:03:14 -0700 (Thu, 09 Jun 2011) | 5 lines
Changed paths:
   M /trunk/libstdc++-v3/ChangeLog
   M /trunk/libstdc++-v3/include/std/type_traits

2011-06-09  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/type_traits (__is_copy_assignable_impl,
	__is_nt_copy_assignable_impl): Fix typos.

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

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

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ranlib: file: .libs/libgfortran.a(_cos_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_cos_c10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_tan_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_sinh_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_cosh_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_tanh_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_conjg_c10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_aint_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_anint_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_sign_i16.o) has no symbols
ranlib: file: .libs/libgfortran.a(_sign_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_dim_i16.o) has no symbols
ranlib: file: .libs/libgfortran.a(_dim_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_atan2_r10.o) has no symbols
ranlib: file: .libs/libgfortran.a(_mod_i16.o) has no symbols
ranlib: file: .libs/libgfortran.a(_mod_r10.o) has no symbols
libtool: link: ( cd ".libs" && rm -f "libgfortran.la" && ln -s "../libgfortran.la" "libgfortran.la" )
make: *** [bootstrap] Error 2
+ '[' -s .bad_compare ']'
+ exit 1
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-- 
Geoffrey Keating <geoffk@apple.com> 
(via an automated GCC regression-testing script.)