"Equality comparison with extraneous parentheses" build failure(s) — clang 5.0

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;
     }
}
PackageVersionSupposed error messageFull log Bug report
hddemux 0.3-1hddemux.c:875:12: error: equality comparison with extraneous parentheses [-Werror,-Wparentheses-equality] Log
libss7 2.0.0-2mtp3.c:1947:31: error: equality comparison with extraneous parentheses [-Werror,-Wparentheses-equality] Log
sympathy 1.2.1+woking+cvs+git20161222vt102.c:366:10: error: equality comparison with extraneous parentheses [-Werror,-Wparentheses-equality] Log

3 errors