#undef _POSIX_C_SOURCE in ui_openssl.c ruined IRIX builds. Comment on why

#include <openssl/e_os2.h>

/* need for #define _POSIX_C_SOURCE arises whenever you pass -ansi to gcc

 * [maybe others?], because it masks interfaces not discussed in standard,

 * sigaction and fileno included. -pedantic would be more appropriate for

 * the intended purposes, but we can't prevent users from adding -ansi.

 */

#define _POSIX_C_SOURCE 1

#include <signal.h>

#include <stdio.h>

#undef _POSIX_C_SOURCE

#include <string.h>

#include <errno.h>