When I build libmediasoupclient, it output errors as below:
…
[ 51%] Linking CXX executable test_mediasoupclient
CMakeFiles/test_mediasoupclient.dir/Device.test.cpp.o: In function __gthread_once(int*, void (*)())': Device.test.cpp:(.text+0x4c): undefined reference topthread_once’
CMakeFiles/test_mediasoupclient.dir/Device.test.cpp.o:(.data.rel.ro._ZTIN15mediasoupclient14PeerConnection32CreateSessionDescriptionObserverE[_ZTIN15mediasoupclient14PeerConnection32CreateSessionDescriptionObserverE]+0x10): undefined reference to `typeinfo for webrtc::CreateSessionDescriptionObserver’
…
It seems that I should add ‘-pthread’ to command, but I don’t know how to modify the make file.
My ubuntu is 18.04 and gcc is 7.4.0.
Which libwebrtc version are you linking against?
I use the m74 branch of libwebrtc, and I have fixed the errors by adding “pthread”, “{CMAKE_DL_LIBS}", "{X11_LIBRARIES}” to target_link_libraries in CMakeLists.txt:
target_link_libraries({PROJECT_NAME} PUBLIC
sdptransform
pthread
{LIBWEBRTC_BINARY_PATH}/libwebrtc${CMAKE_STATIC_LIBRARY_SUFFIX}
{CMAKE_DL_LIBS}
{X11_LIBRARIES}
)
Now, I try to build mediasoup-broadcaster-demo, it output errors as below:
…
CMake Error at CMakeLists.txt:18 (add_executable):
add_executable called with incorrect number of arguments
CMake Error at CMakeLists.txt:43 (target_sources):
Cannot specify sources for target “broadcaster” which is not built by this
project.
CMake Error at CMakeLists.txt:52 (target_include_directories):
Cannot specify include directories for target “broadcaster” which is not
built by this project.
…
Do you have any advice?
Which cmake version are you using?
cmake version is 3.10.2
And building libwebrtc command is:
gn gen out/m74 --args=‘is_debug=false is_component_build=false is_clang=true rtc_include_tests=false rtc_use_h264=true rtc_enable_protobuf=false use_rtti=true use_custom_libcxx=false’
CmakeLists.txt needs to be refactored since it does only work for new cmake versions.
Related issue: cmake: add_executable called with incorrect number of arguments · Issue #2 · versatica/mediasoup-broadcaster-demo · GitHub
It works with cmake 3.14.4. Thank you!
Hi, new cmake does not work for me.
I also work on m74, alway include error
(.data.rel.ro._ZTIN15mediasoupclient14PeerConnection32CreateSessionDescriptionObserverE[_ZTIN15mediasoupclient14PeerConnection32CreateSessionDescriptionObserverE]+0x10): undefined reference to `typeinfo for webrtc::CreateSessionDescriptionObserver’
I found these files not linked,so virtual functions is undefined
jsep.cc
virtual void OnSuccess() = 0;
// See description in CreateSessionDescriptionObserver for OnFailure.
virtual void OnFailure(RTCError error);
virtual void OnFailure(const std::string& error);
I don’t know how to fix that. Any help?
Have you followed the building instructions?
Please, paste here your cmake version and the output of the build command cmake . -Bbuild ...