Hi, > CC=/usr/bin/llvm-gcc CXX=/usr/bin/llvm-g++ ../../llvm-gcc/configure > --prefix=`pwd`/../install --program-prefix=llvm- > --enable-llvm=`pwd`/../../build_llvm/ --enable-languages=c,c++ does it work if you compile using your system gcc/g++ rather than with llvm-gcc/llvm-g++? Ciao, Duncan.