ensure we get explicit definition of various _XOPEN_SOURCE functions we use

Originally committed as revision 14766 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -19,6 +19,9 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+/* needed for usleep() */
+#define _XOPEN_SOURCE 500
+
 #include "config.h"
 #include <ctype.h>
 #include <string.h>
@@ -27,6 +30,7 @@
 #include <errno.h>
 #include <signal.h>
 #include <limits.h>
+#include <unistd.h>
 #include "libavformat/avformat.h"
 #include "libavdevice/avdevice.h"
 #include "libswscale/swscale.h"
@@ -45,7 +49,6 @@
 #endif
 
 #if defined(HAVE_TERMIOS_H)
-#include <unistd.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <sys/time.h>

libavcodec/utils.c

@@ -25,6 +25,9 @@
  * utils.
  */
 
+/* needed for mkstemp() */
+#define _XOPEN_SOURCE 500
+
 #include "libavutil/integer.h"
 #include "libavutil/crc.h"
 #include "avcodec.h"
@@ -32,6 +35,7 @@
 #include "opt.h"
 #include "imgconvert.h"
 #include "audioconvert.h"
+#include <stdlib.h>
 #include <stdarg.h>
 #include <limits.h>
 #include <float.h>

libavformat/os_support.c

@@ -19,6 +19,10 @@
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
+
+/* needed by inet_aton() */
+#define _SVID_SOURCE
+
 #include "config.h"
 #include "avformat.h"
 #include <unistd.h>

libavformat/rtpdec.c

@@ -19,6 +19,9 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+/* needed for gethostname() */
+#define _XOPEN_SOURCE 500
+
 #include "libavcodec/bitstream.h"
 #include "avformat.h"
 #include "mpegts.h"

libavformat/rtsp.c

@@ -19,6 +19,9 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+/* needed by inet_aton() */
+#define _SVID_SOURCE
+
 #include "libavutil/avstring.h"
 #include "avformat.h"