Unused parameter - Rebuild of the Debian archive with clang

"Unused parameter" build failure(s) — clang 3.4.2

-Wextra of clang incluses -Wunused-parameter which is not the case with gcc.
So, the following code will fail with clang but build with gcc:

int main(int argc, char *argv[])
{
}

clang -Werror -Wextra -c plop.c
gcc -Werror -Wextra -c plop.c

Package	Version	Supposed error message	Full log
ifhp	3.5.20-13	ifhp.c:1061:43: error: unused parameter 'infovar' [-Werror,-Wunused-parameter]	Log
jffi	1.0.2-11	[exec] /Â«PKGBUILDDIRÂ»/jni/jffi/FastLongInvoke.c:27:47: error: unused parameter 'env' [-Werror,-Wunused-parameter]	Log
switchsh	0~20070801-3.1	switchsh.c:69:14: error: unused parameter 'argc' [-Werror,-Wunused-parameter]	Log

3 errors