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 CMakeFiles/soci.tests.dir/test_package.cpp.o: In function `main': test_package.cpp:(.text.startup+0x29): undefined reference to `factory_empty' test_package.cpp:(.text.startup+0x4e): undefined reference to `soci::session::session(soci::backend_factory const&, std::string const&)' collect2: error: ld returned 1 exit status make[2]: *** [soci.tests] Error 1 make[1]: *** [CMakeFiles/soci.tests.dir/all] Error 2 make: *** [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-3924/19/158a3fd8-271f-43f2-88e9-0c096c4d5a15/recipes/soci/all/test_package/build/2e2cf2b1e9a2acd806052bb6f3adcbaee333a93b' '--' '-j3'