llvm-gcc does not find needed std library calls for Moc: adding -lstdc++...

... arg solves the problem (qt 4.8.0, osx 10.7.3, XCode 4.3.2)

Error:
/usr/bin/llvm-gcc -L/usr/X11/lib -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -Xarch_x86_64 -mmacosx-version-min=10.5 -o ../../../bin/moc release-shared/moc.o release-shared/preprocessor.o release-shared/generator.o release-shared/parser.o release-shared/token.o release-shared/main.o    -L/usr/X11/lib -L/private/tmp/homebrew-qt-4.8.0-7Xsl/qt-everywhere-opensource-src-4.8.0/src/tools/bootstrap -lbootstrap -L/usr/X11/lib -framework CoreServices -lz -lz
Undefined symbols for architecture x86_64:
  "std::terminate()", referenced from:
      Moc::parseClassHead(ClassDef*)      in moc.o
      Moc::checkProperties(ClassDef*)      in moc.o
      Moc::checkSuperClasses(ClassDef*)      in moc.o
      Moc::lexemUntil(Token)      in moc.o
      Moc::parseType()     in moc.o
      Moc::parseEnum(EnumDef*)     in moc.o
      Moc::parseInterfaces(ClassDef*)      in moc.o
      ...
  "operator new(unsigned long)", referenced from:
      QList<PropertyDef>::detach_helper(int)     in moc.o
      QList<ArgumentDef>::detach_helper(int)     in moc.o
      QList<FunctionDef>::detach_helper(int)     in moc.o
      QList<ClassDef::Interface>::detach_helper(int)     in moc.o
      QList<QList<ClassDef::Interface> >::detach_helper(int) in moc.o
      QList<ClassInfoDef>::detach_helper(int)     in moc.o
      QList<QPair<QByteArray, FunctionDef::Access> >::detach_helper(int)      in moc.o
      ...
  "operator delete(void*)", referenced from:
      Moc::parseSlotInPrivate(ClassDef*, FunctionDef::Access)       in moc.o
      Moc::parseSignals(ClassDef*)      in moc.o
      Moc::parseSlots(ClassDef*, FunctionDef::Access)       in moc.o
      Moc::parse()     in moc.o
      QList<PropertyDef>::detach_helper(int)     in moc.o
      QList<PropertyDef>::~QList()  in moc.o
      QList<ArgumentDef>::detach_helper(int)     in moc.o
      ...
  "operator new[](unsigned long)", referenced from:
      normalizeType(char const*, bool)in moc.o
      Generator::generateMetaObject(bool)  in generator.o
      qstrdup(char const*)in libbootstrap.a(qbytearray.o)
      QHashData::rehash(int)  in libbootstrap.a(qhash.o)
      QHashData::detach_helper2(void (*)(QHashData::Node*, void*), void (*)(QHashData::Node*), int, int)in libbootstrap.a(qhash.o)
      QDirPrivate::sortFileList(QFlags<QDir::SortFlag>, QList<QFileInfo>&, QStringList*, QList<QFileInfo>*)in libbootstrap.a(qdir.o)
      QIODevicePrivateLinearBuffer::makeSpace(unsigned long, QIODevicePrivateLinearBuffer::FreeSpacePos)in libbootstrap.a(qiodevice.o)
      ...
  "operator delete[](void*)", referenced from:
      normalizeType(char const*, bool)in moc.o
      qputenv(char const*, QByteArray const&)in libbootstrap.a(qglobal.o)
      QHashData::rehash(int)  in libbootstrap.a(qhash.o)
      QHashData::free_helper(void (*)(QHashData::Node*))in libbootstrap.a(qhash.o)
      QHashData::destroyAndFree()      in libbootstrap.a(qhash.o)
      QDirPrivate::sortFileList(QFlags<QDir::SortFlag>, QList<QFileInfo>&, QStringList*, QList<QFileInfo>*)in libbootstrap.a(qdir.o)
      QIODevicePrivate::~QIODevicePrivate()in libbootstrap.a(qiodevice.o)
      ...
  "___gxx_personality_v0", referenced from:
      Dwarf Exception Unwind Info (__eh_frame) in moc.o
      Dwarf Exception Unwind Info (__eh_frame) in preprocessor.o
      Dwarf Exception Unwind Info (__eh_frame) in generator.o
      Dwarf Exception Unwind Info (__eh_frame) in parser.o
      Dwarf Exception Unwind Info (__eh_frame) in main.o
      Dwarf Exception Unwind Info (__eh_frame) in libbootstrap.a(qglobal.o)
      Dwarf Exception Unwind Info (__eh_frame) in libbootstrap.a(qbytearray.o)
      ...
  "___cxa_guard_acquire", referenced from:
      global_callback_table()      in libbootstrap.a(qglobal.o)
      customTypes()      in libbootstrap.a(qmetatype.o)
      customTypesLock()      in libbootstrap.a(qmetatype.o)
      mutex()     in libbootstrap.a(qregexp.o)
      globalEngineCache()      in libbootstrap.a(qregexp.o)
      fileEngineHandlerMutex()      in libbootstrap.a(qabstractfileengine.o)
      fileEngineHandlers()      in libbootstrap.a(qabstractfileengine.o)
      ...
  "___cxa_guard_release", referenced from:
      global_callback_table()      in libbootstrap.a(qglobal.o)
      customTypes()      in libbootstrap.a(qmetatype.o)
      customTypesLock()      in libbootstrap.a(qmetatype.o)
      mutex()     in libbootstrap.a(qregexp.o)
      globalEngineCache()      in libbootstrap.a(qregexp.o)
      fileEngineHandlerMutex()      in libbootstrap.a(qabstractfileengine.o)
      fileEngineHandlers()      in libbootstrap.a(qabstractfileengine.o)
      ...
  "vtable for __cxxabiv1::__si_class_type_info", referenced from:
      typeinfo for QFilein libbootstrap.a(qfile.o)
      typeinfo for QFilePrivatein libbootstrap.a(qfile.o)
      typeinfo for QFSFileEnginePrivatein libbootstrap.a(qfsfileengine.o)
      typeinfo for QFSFileEnginein libbootstrap.a(qfsfileengine.o)
      typeinfo for QTemporaryFileEnginein libbootstrap.a(qtemporaryfile.o)
      typeinfo for QTemporaryFilein libbootstrap.a(qtemporaryfile.o)
      typeinfo for QTemporaryFilePrivatein libbootstrap.a(qtemporaryfile.o)
      ...
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for __cxxabiv1::__class_type_info", referenced from:
      typeinfo for QIODevicePrivatein libbootstrap.a(qiodevice.o)
      typeinfo for QIODevicein libbootstrap.a(qiodevice.o)
      typeinfo for QDirIteratorin libbootstrap.a(qdiriterator.o)
      typeinfo for QAbstractFileEnginePrivatein libbootstrap.a(qabstractfileengine.o)
      typeinfo for QAbstractFileEnginein libbootstrap.a(qabstractfileengine.o)
      typeinfo for QAbstractFileEngineIteratorin libbootstrap.a(qabstractfileengine.o)
      typeinfo for QAbstractFileEngineHandlerin libbootstrap.a(qabstractfileengine.o)
      ...
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "___cxa_pure_virtual", referenced from:
      vtable for QIODevicein libbootstrap.a(qiodevice.o)
      vtable for QAbstractFileEngineIteratorin libbootstrap.a(qabstractfileengine.o)
      vtable for QAbstractFileEngineHandlerin libbootstrap.a(qabstractfileengine.o)
      vtable for QTextCodecin libbootstrap.a(qtextcodec.o)
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[1]: *** [../../../bin/moc] Error 1
make: *** [sub-moc-make_default-ordered] Error 2
==> Exit Status: 2
https://github.com/mxcl/master/blob/master/Library/Formula/qt.rb#L86
==> Build Environment
CPU: quad-core 64-bit sandybridge
MacOS: 10.7.3-x86_64
Xcode: 4.3.2
CC: /usr/bin/llvm-gcc => /usr/llvm-gcc-4.2/bin/llvm-gcc-4.2
CXX: /usr/bin/llvm-g++ => /usr/llvm-gcc-4.2/bin/llvm-g++-4.2
LD: /usr/bin/llvm-gcc => /usr/llvm-gcc-4.2/bin/llvm-gcc-4.2
CFLAGS: -Os -w -pipe   -march=core2 -msse4
CXXFLAGS: -Os -w -pipe   -fvisibility=hidden -march=core2 -msse4
CPPFLAGS: -I/usr/X11/include
LDFLAGS: -L/usr/X11/lib
MAKEFLAGS: -j4
Error: Failed executing: make (qt.rb:86)