aballier@gentoo.org Alexis Ballier llvm@gentoo.org LLVM Project Force building using installed clang (rather than the default CC/CXX; required for testing). Build on top of sys-libs/libcxxabi instead of gcc's libsupc++ (avoids depending on gcc). Use libunwind instead of libgcc_s for stack unwinding, thus avoiding dependence on gcc. llvm/llvm-project