+
+# If the C compiler supports it, also set -ffile-prefix-map
+echo "int main() {}" > genbindings_path_map_test_file.c
+clang -o /dev/null -ffile-prefix-map=$HOME/.cargo= genbindings_path_map_test_file.c > /dev/null 2>&1 &&
+# Now that we've done our last non-LTO build, turn on LTO in CFLAGS as well