http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59136
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Alexey Samsonov from comment #6) > External process will only be launched if a user has llvm-symbolizer binary > in his PATH. This behaivor can also be turned off with a runtime option > (ASAN_OPTIONS=symbolize=false). This makes GCC compiled with ASAN totally unusable since every configure fails with llvm-symbolizer: Unknown command line argument '--default-arch=x86_64'. Try: '/usr/bin/llvm-symbolizer -help' llvm-symbolizer: Did you mean '-disable-ssc=x86_64'? ASAN_OPTIONS=symbolize=false should be the default when built within GCC.