CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY CMAKE_INSTALL_BINDIR CMAKE_INSTALL_DATAROOTDIR CMAKE_INSTALL_INCLUDEDIR CMAKE_INSTALL_LIBDIR CMAKE_INSTALL_LIBEXECDIR CMAKE_INSTALL_OLDINCLUDEDIR CMAKE_INSTALL_SBINDIR CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY /usr/bin/ld: /home/conan/w/cci_PR-3387/.conan/data/cppbenchmark/cci.20201029/_/_/package/71a272ede061a3d6abdd68e8d9788b9607e8a8bf/lib/libcppbenchmark.so: undefined reference to `pthread_create' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/test_package.dir/build.make:84: bin/test_package] Error 1 make[1]: *** [CMakeFiles/Makefile2:76: CMakeFiles/test_package.dir/all] Error 2 make: *** [Makefile:84: all] Error 2 ERROR: cppbenchmark/cci.20201029 (test package): Error in build() method, line 11 cmake.build() ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-3387/6/6c684e42-51ef-4449-be07-5f76e19fc9b0/recipes/cppbenchmark/all/test_package/build/b64491cb3aea6aaeef6a1eb7185b751d43f91c96' '--' '-j3'