logan added a comment. Hi @rengolin and @EricWF,
After tracing the commit log of clang, it seems that `--rtlib=` is ignored intentionally when `-nodefaultlibs` is present. (see also: https://reviews.llvm.org/rL254535) And, unfortunately, we don't have a command line option to ask clang to link compiler-rt built-in library along (regardless the `-nodefaultlibs` option.) One solution might be adding the `libclang_rt.builtins.${arch}.a` detection rules[1] to CMakeLists.txt, and manually specify `-lclang_rt.builtins-${arch}.a` when `LIBCXXABI_USE_COMPILER_RT` is enabled. How do you think about this solution? [1] There is a function named `ToolChain::getCompilerRT()` in `${clang}/lib/Driver/ToolChain.cpp` which is responsible to detect and pick the correct compiler-rt library. https://reviews.llvm.org/D24083 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
