use warnings;
use Inline C => Config =>
    BUILD_NOISY => 1;

use Inline C => <<'EOC';

int add(SV * a, ...) {
 dXSARGS;
 int i, ret = 0;

 for(i = 0; i < items; i++)
   ret += SvIV(ST(i));

 return ret;
}

EOC

print add(11, 12), "\n"; # prints 23
print add(10, 11, 12), "\n"; # prints 33