Index: libcxx/utils/libcxx/test/config.py =================================================================== --- libcxx/utils/libcxx/test/config.py +++ libcxx/utils/libcxx/test/config.py @@ -204,7 +204,7 @@ assert self.cxx_is_clang_cl flags = [] - compile_flags = _prefixed_env_list('INCLUDE', '-isystem') + compile_flags = [] link_flags = _prefixed_env_list('LIB', '-L') for path in _split_env_var('LIB'): self.add_path(self.exec_env, path)