[FFmpeg-cvslog] avformat/file: guard fd_dup by FD_PROTOCOL or PIPE_PROTOCOL

[Zhao Zhili]

ffmpeg | branch: master | Zhao Zhili <zhilizhao at tencent.com> | Sun Jun 30 18:33:19 2024 +0800| [cb9c98da16e8412046835ebc0d167a4e09909df0] | committer: Zhao Zhili

avformat/file: guard fd_dup by FD_PROTOCOL or PIPE_PROTOCOL

fd_dup is unused when fd and pipe have been disabled. This also
fix build error with wasi since 'dup' isn't available.

Signed-off-by: Zhao Zhili <zhilizhao at tencent.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cb9c98da16e8412046835ebc0d167a4e09909df0
---

 libavformat/file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/file.c b/libavformat/file.c
index 3fc1e741f2..6a66040b65 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -193,6 +193,7 @@ static int file_check(URLContext *h, int mask)
     return ret;
 }
 
+#if CONFIG_FD_PROTOCOL || CONFIG_PIPE_PROTOCOL
 static int fd_dup(URLContext *h, int oldfd)
 {
     int newfd;
@@ -215,6 +216,7 @@ static int fd_dup(URLContext *h, int oldfd)
 #endif
     return newfd;
 }
+#endif
 
 static int file_close(URLContext *h)
 {