Warnings при использовании basename ()

man 3 basename, #include <libgen.h>>

Теперь вид сбоку:

#include <stdio.h>
/***#include <string.h>***/
#include <libgen.h>
int main (int argc, char **argv)
{
  printf ("%s\n", basename ((const char *) (argv [0])));
  return 0;
}

gcc -Wall -o foo foo.c
foo.c:6: warning: passing arg 1 of `__xpg_basename' discards qualifiers
from pointer target type

printf ("%s\n", basename (argv [0]));

/* Return final component of PATH.

This is the weird XPG version of this function. It sometimes will
modify its argument. Therefore we normally use the GNU version (in
<string.h>) and only if this header is included make the XPG
version available under the real name. */
extern char *__xpg_basename (char *__path) __THROW;
#define basename __xpg_basename
ключевое слово: GNU version...#define __USE_GNU
#include <string.h>, так ок?

const убери