Update from stable branch.
diff --git a/apps/apps.c b/apps/apps.c
index b04bfbd..b992a04 100644
--- a/apps/apps.c
+++ b/apps/apps.c
@@ -109,10 +109,12 @@
*
*/
+#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 2 /* On VMS, you need to define this to get
the declaration of fileno(). The value
2 is to make sure no function defined
in POSIX-2 is left undefined. */
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
diff --git a/crypto/ui/ui_openssl.c b/crypto/ui/ui_openssl.c
index 1c2dcc4..9930439 100644
--- a/crypto/ui/ui_openssl.c
+++ b/crypto/ui/ui_openssl.c
@@ -122,7 +122,9 @@
* 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
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 2
+#endif
#include <signal.h>
#include <stdio.h>
#include <string.h>
