CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY /usr/bin/ld: /home/conan/w/cci_PR-4134/.conan/data/usrsctp/0.9.4.0/_/_/package/02ba16c8306aa344129c920071ce71c85f93cb2f/lib/libusrsctp.so: undefined reference to `pthread_mutex_trylock' /usr/bin/ld: /home/conan/w/cci_PR-4134/.conan/data/usrsctp/0.9.4.0/_/_/package/02ba16c8306aa344129c920071ce71c85f93cb2f/lib/libusrsctp.so: undefined reference to `pthread_join' /usr/bin/ld: /home/conan/w/cci_PR-4134/.conan/data/usrsctp/0.9.4.0/_/_/package/02ba16c8306aa344129c920071ce71c85f93cb2f/lib/libusrsctp.so: undefined reference to `pthread_create' /usr/bin/ld: /home/conan/w/cci_PR-4134/.conan/data/usrsctp/0.9.4.0/_/_/package/02ba16c8306aa344129c920071ce71c85f93cb2f/lib/libusrsctp.so: undefined reference to `pthread_mutexattr_init' /usr/bin/ld: /home/conan/w/cci_PR-4134/.conan/data/usrsctp/0.9.4.0/_/_/package/02ba16c8306aa344129c920071ce71c85f93cb2f/lib/libusrsctp.so: undefined reference to `pthread_mutexattr_destroy' clang: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: *** [CMakeFiles/test_package.dir/build.make:104: bin/test_package] Error 1 make[1]: *** [CMakeFiles/Makefile2:95: CMakeFiles/test_package.dir/all] Error 2 make: *** [Makefile:103: all] Error 2 ERROR: usrsctp/0.9.4.0 (test package): Error in build() method, line 13 cmake.build() ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-4134/14/76f89019-bd12-4b2c-b5c1-eea37a3bc741/recipes/usrsctp/all/test_package/build/c7d6af883189c22ff5063eb96c73bae6cd99a0f3' '--' '-j3'