file: Only include unistd.h if it exists

It is included for the open/read/write/close functions. On
MSVC, where this header does not exist, the same functions
are provided by io.h, which is already included.

On windows, these functions are provided by io.h. Make sure
io.h is included if it exists, regardless of the setmode
function.

Signed-off-by: Martin Storsjö <martin@martin.st>

diff --git a/configure b/configure
index 3619eff..1290369 100755 (executable)
--- a/configure
+++ b/configure
@@ -1093,6 +1093,7 @@ HAVE_LIST="
     ibm_asm
     inet_aton
     inline_asm
+    io_h
     isatty
     isinf
     isnan
@@ -2879,6 +2880,7 @@ check_func_headers windows.h VirtualAlloc
 check_header dlfcn.h
 check_header dxva.h
 check_header dxva2api.h
+check_header io.h
 check_header malloc.h
 check_header poll.h
 check_header sys/mman.h

diff --git a/libavformat/file.c b/libavformat/file.c
index cca9ec1..0e3577d 100644 (file)
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -22,10 +22,12 @@
 #include "libavutil/avstring.h"
 #include "avformat.h"
 #include <fcntl.h>
-#if HAVE_SETMODE
+#if HAVE_IO_H
 #include <io.h>
 #endif
+#if HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <sys/stat.h>
 #include <stdlib.h>
 #include "os_support.h"