Proper check for mkstemp().

Originally committed as revision 9596 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -673,6 +673,7 @@ HAVE_LIST="
     machine_ioctl_meteor_h
     malloc_h
     memalign
+    mkstemp
     mlib
     ppc64
     sdl
@@ -1507,6 +1508,8 @@ fi
 
 check_header byteswap.h
 
+check_func mkstemp
+
 check_header arpa/inet.h
 
 check_func inet_aton

libavcodec/utils.c

@@ -34,7 +34,7 @@
 #include <stdarg.h>
 #include <limits.h>
 #include <float.h>
-#ifdef __MINGW32__
+#if !defined(HAVE_MKSTEMP)
 #include <fcntl.h>
 #endif
 
@@ -1333,7 +1333,7 @@ unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
  * and opened file name in **filename. */
 int av_tempfile(char *prefix, char **filename) {
     int fd=-1;
-#ifdef __MINGW32__
+#if !defined(HAVE_MKSTEMP)
     *filename = tempnam(".", prefix);
 #else
     size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
@@ -1344,7 +1344,7 @@ int av_tempfile(char *prefix, char **filename) {
         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
         return -1;
     }
-#ifdef __MINGW32__
+#if !defined(HAVE_MKSTEMP)
     fd = open(*filename, _O_RDWR | _O_BINARY | _O_CREAT, 0444);
 #else
     snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);