On Thu, 24 Jul 2025, Alejandro Colomar wrote:

quoted

It is not too broad. A compiler may define the identifier as
a builtin. For instance... GCC! The following program fails
to compile (note that I do not even include <math.h>):

static int exp (void)
{
  return 1;
}

That's file scope, which is a context in which exp is reserved.  The 
proposed change was about function prototype scope, in which it's not 
reserved.

-- 
Joseph S. Myers
josmyers@redhat.com