/*[XSI]*/
#if 202405L <= _POSIX_C_SOURCE
#define _XOPEN_SOURCE 800
#elif 200809L <= _POSIX_C_SOURCE
#define _XOPEN_SOURCE 700
#endif
#include <utmpx.h>
#ifdef getutxid
#undef getutxid
#endif
struct utmpx *(*foo)(const struct utmpx *) = getutxid;
int main(void) { return 0; }