How do I initialize LLVM's external symbolizer?

Question

When compiling with -fsanitize=memory I get WARNING: Trying to symbolize code, but external symbolizer is not initialized! when running the program. How do I initialize the external symbolizer?

Answer 1

I solved my own problem using MSAN_SYMBOLIZER_PATH=$(which llvm-symbolizer-3.4) ./a.out. The problem is that Ubuntu postfixes the version number but the binary doesn't know that. Of course you need to use MSAN instead of ASAN when using the memory sanitizer.