[llvm-testresults] buildbot failure in lab.llvm.org on clang-x86_64-darwin11-nobootstrap-RAincremental

[llvmlab-buildmaster at lab.llvm.org]

The Buildbot has detected a failed build on builder clang-x86_64-darwin11-nobootstrap-RAincremental while building cfe.
Full details are available at:
 http://lab.llvm.org:8013/builders/clang-x86_64-darwin11-nobootstrap-RAincremental/builds/11173

Buildbot URL: http://lab.llvm.org:8013/

Buildslave for this Build: xserve5

Build Reason: Triggerable(phase1-stage0)
Build Source Stamp: 199324
Blamelist: 

BUILD FAILED: failed configure.with.host

sincerely,
 -The Buildbot


================================================================================

CHANGES:


LOGS:
Last 15 lines of 'stdio':
	checking whether we are using the GNU C++ compiler... yes
	checking whether /Users/buildslave/zorg/buildbot/smooshlab/slave-0.8/build.clang-x86_64-darwin11-nobootstrap-RAincremental/host-compiler/bin/clang++ accepts -g... yes
	checking how to run the C preprocessor... /Users/buildslave/zorg/buildbot/smooshlab/slave-0.8/build.clang-x86_64-darwin11-nobootstrap-RAincremental/host-compiler/bin/clang -E
	checking whether GCC or Clang is our host compiler... clang
	checking whether Clang is new enough... yes
	checking whether Clang will select a modern C++ standard library... no
	configure: error:
	We detected a missing feature in the standard C++ library that was known to be
	missing in libstdc++4.6 and implemented in libstdc++4.7. There are numerous
	C++11 problems with 4.6's library, and we don't support GCCs or libstdc++ older
	than 4.7. You will need to update your system and ensure Clang uses the newer
	standard library.
	
	If this error is incorrect or you need to force things to work, you may pass
	'--disable-compiler-version-checks' to configure to bypass this test.