Current llvm/clang/compiler-rt/polly/testsuite/libcxx from 3.4 branch is broken during the bootstrap on x86_64-apple-darwin12 against Xcode 5's clang with the failure... [ 54%] [ 54%] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/AliasAnalysisCounter.cpp.o Building CXX object lib/ExecutionEngine/CMakeFiles/LLVMExecutionEngine.dir/ExecutionEngine.cpp.o /sw/src/fink.build/llvm34-3.4-0/llvm-3.4/tools/clang/lib/AST/MicrosoftMangle.cpp:418:12: error: read-only variable is not assignable *I++ = 'A' + (Value & 0xf); ~~~~ ^