I am still seeing build errors with -Werror: [off-dbg] : [llvm] /ptmp/dag/llvm/official/llvm/lib/Support/APInt.cpp: In function 'unsigned int getDigit(char, uint8_t)': [off-dbg] : [llvm] /ptmp/dag/llvm/official/llvm/lib/Support/APInt.cpp:57: error: comparison between signed and unsigned integer expressions [off-dbg] : [llvm] /ptmp/dag/llvm/official/llvm/lib/Support/APInt.cpp:61: error: comparison between signed and unsigned integer expressions I believe this is the culprit: ------------------------------------------------------------------------ r139695 | dgregor | 2011-09-14 10:54:46 -0500 (Wed, 14 Sep 2011) | 1 line Add APInt support for converting to/from hexatridecimal strings ------------------------------------------------------------------------ -Dave