* hide them.
*/
/* _GNU_SOURCE has to be set before including config.h, as otherwise
* features.h will be included and it will be too late.
#if defined(linux) && defined(__GNUC__)
# define _GNU_SOURCE
#endif
#include "config.h"
#ifdef GETRES_SUPPORT
# if defined(LINUX)
#ifdef __GNUC__
#define _GNU_SOURCE
/* requires dynamic linking with libc */
#include <dlfcn.h>