"Equality comparison with extraneous parentheses" build failure(s) — clang 3.8.1

clang -Wall option integrates the option -Wparentheses-equality which gcc does not know about.
// clang -Wall -Werror -c plop.c

void foo() {
     int a=1;
     if ((a == 1)) {
        return;
     }
}

No error detected for version 3.8.1