No rule to make target '../webrtc/src/out/Release/obj/rtc_base/librtc_json.a', needed by 'webrtc-streamer'.

[XingJinming-real]

When I build webrtc-streamer with make, it gives the following error.

[ 98%] Building CXX object CMakeFiles/webrtc-streamer.dir/src/rtpvideocapturer.cpp.o [ 99%] Building CXX object CMakeFiles/webrtc-streamer.dir/src/rtspaudiocapturer.cpp.o [ 99%] Building CXX object CMakeFiles/webrtc-streamer.dir/src/rtspvideocapturer.cpp.o make[2]: No rule to make target '../webrtc/src/out/Release/obj/rtc_base/librtc_json.a', needed by 'webrtc-streamer'. Stop. make[1]: [CMakeFiles/Makefile2:124: CMakeFiles/webrtc-streamer.dir/all] Error 2 make: *** [Makefile:156: all] Error 2

I tried 491, but it didn't work.

Thanks for your help

[mpromonet]

Hi,

This is the end of your build log, but the error is far before when generating webrtc SDK.

Best Regards, Michel.

[XingJinming-real]

I re-runed the command rm -rf ../webrtc/src/out && cmake . && make and it gives me the error

[mpromonet]

Did you install webrtc in ../webrtc ?

[XingJinming-real]

this is the file structure. I install webrtc through this command fetch --no-history webrtc

[mpromonet]

In your log there is no build of webrtc, it should looks like :

...
CMAKE_CXX_COMPILER_ID=GNU
CMAKE_FIND_ROOT_PATH =
ALSA_FOUND = TRUE
PulseAudio_FOUND = 1
GTK3_FOUND = 1
Done. Made 1323 targets from 258 files in 1483ms
[1/3836] STAMP obj/poison_audio_codecs.stamp
[2/3836] STAMP obj/poison_default_task_queue.stamp
...

maybe you have not permission to remove ../webrtc/src/out ? in order to rebuild it....

[XingJinming-real]

I removed the out dir and it gives me this

[mpromonet]

Then you need to debug why gn gen & ninja are not run between GTK_FOUND & RMTP_FOUND

[XingJinming-real]

I figured it out. I didn't install ninja and pkg-config Thanks a lot

[AndySkaura]

The same problem occurred, and I don't know what happened, but during the cmake . stage, the following was encountered:

CMAKE_BUILD_TYPE = Release
WEBRTCROOT = /home/webrtc-streamer/../webrtc
WEBRTCDESKTOPCAPTURE= ON
CMAKE_CXX_COMPILER_ID=GNU
-- Found Git: /usr/bin/git (found version "2.25.1") 
CMAKE_FIND_ROOT_PATH = 
ALSA_FOUND = FALSE
PulseAudio_FOUND = 0
GTK3_FOUND = 
ERROR at //build/config/linux/pkg_config.gni:104:17: Script returned non-zero exit code.
    pkgresult = exec_script(pkg_config_script, args, "json")
                ^----------
Current dir: /home/webrtc/src/out/Release/
Command: python3 /home/webrtc/src/build/config/linux/pkg-config.py glib-2.0 gmodule-2.0 gobject-2.0 gthread-2.0
Returned 1.
stderr:

Package glib-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `glib-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'glib-2.0' found
Package gmodule-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gmodule-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gmodule-2.0' found
Package gobject-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gobject-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gobject-2.0' found
Package gthread-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gthread-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gthread-2.0' found
Could not run pkg-config.

Therefore, I installed sudo apt-get install libglib2.0-dev, and it started working correctly. I hope I can be helpful to you.