问题
I've installed gst-rtsp-server and I wanted to try a simple code. But on compilation I'm getting the following error:
In function `main':
test-launch01.c:(.text+0x64): undefined reference to `gst_rtsp_server_new'
test-launch01.c:(.text+0x74): undefined reference to `gst_rtsp_server_get_media_mapping'
test-launch01.c:(.text+0x7d): undefined reference to `gst_rtsp_media_factory_new'
test-launch01.c:(.text+0x95): undefined reference to `gst_rtsp_media_factory_set_shared'
test-launch01.c:(.text+0xad): undefined reference to `gst_rtsp_media_factory_set_launch'
test-launch01.c:(.text+0xc9): undefined reference to `gst_rtsp_media_mapping_add_factory'
test-launch01.c:(.text+0xe9): undefined reference to `gst_rtsp_server_attach'
collect2: ld returned 1 exit status
I've included the two headers. What am I missing?
回答1:
It appears that you have not linked to the lib. "Undefined reference" usually means that you have included the necessary header files but that the linker has not found the definitions.
Try adding:
`pkg-config gstreamer-rtsp-0.10 --libs`
to your linker invocation.
回答2:
add gstreamer-rtsp-server-1.0 to pkg-config.
回答3:
After running
apt-get install libgstrtspserver-0.10-dev
the command
pkg-config --libs gstreamer-rtsp-0.10
returns
-pthread -lgstrtsp-0.10 -lgstreamer-0.10 -lgstsdp-0.10 -lgobject-2.0 -lgmodule-2.0 -lgthread-2.0 -lxml2 -lglib-2.0
But
ls /usr/lib/libgstrtsp*
returns
/usr/lib/libgstrtspserver-0.10.so
/usr/lib/libgstrtspserver-0.10.so.0.0.0
/usr/lib/libgstrtspserver-0.10.so.0
So, replacing the flag -lgstrtsp-0.10 by -lgstrtspserver-0.10 solved this issue for me.
回答4:
Initially I was using the below command to compile when I also got similar errors
gcc -Wall test-server.c -o test-server $(pkg-config --cflags --libs gstreamer-1.0)
After reading comments above, it looked like not linking to gstreamer-rtsp-server-1.0 lib was the issue so I changed the command as below
gcc -Wall test-server.c -o test-server $(pkg-config --cflags --libs gstreamer-1.0 gstreamer-rtsp-server-1.0)
NOTE: My build environment is Ubuntu 19.04
来源：https://stackoverflow.com/questions/7143581/gst-rtsp-server-programming