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 CONAN_COMPILER CONAN_COMPILER_VERSION CONAN_CXX_FLAGS CONAN_C_FLAGS CONAN_EXPORTED CONAN_IN_LOCAL_CACHE CONAN_LIBCXX CONAN_SHARED_LINKER_FLAGS CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY SOCI_EMPTY /usr/bin/ld: CMakeFiles/soci.tests.dir/test_package.cpp.o: in function `main': /home/conan/w/cci_PR-3924/19/d207304a-a8ab-4557-ab5d-7092d729fa2a/recipes/soci/all/test_package/test_package.cpp:12: undefined reference to `factory_empty' /usr/bin/ld: /home/conan/w/cci_PR-3924/19/d207304a-a8ab-4557-ab5d-7092d729fa2a/recipes/soci/all/test_package/test_package.cpp:13: undefined reference to `soci::session::session(soci::backend_factory const&, std::string const&)' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/soci.tests.dir/build.make:104: soci.tests] Error 1 make[1]: *** [CMakeFiles/Makefile2:95: CMakeFiles/soci.tests.dir/all] Error 2 make: *** [Makefile:103: all] Error 2 ERROR: soci/4.0.1 (test package): Error in build() method, line 17 cmake.build() ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-3924/19/d207304a-a8ab-4557-ab5d-7092d729fa2a/recipes/soci/all/test_package/build/f982a61a155357525f16741af018a383e3780d09' '--' '-j3'