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 In file included from /home/conan/w/cci_PR-4363/4/d61c99e7-3f7f-465a-8b52-e551754e98f3/recipes/keychain/all/test_package/test_package.cpp:1: /home/conan/w/cci_PR-4363/.conan/data/keychain/1.2.0/_/_/package/5cdcdd67045eb3e5a5cc9da2de2c2a5ddb737fe6/include/keychain/keychain.h:87:6: warning: scoped enumerations are a C++11 extension [-Wc++11-extensions] enum class ErrorType { ^ /home/conan/w/cci_PR-4363/.conan/data/keychain/1.2.0/_/_/package/5cdcdd67045eb3e5a5cc9da2de2c2a5ddb737fe6/include/keychain/keychain.h:103:20: warning: use of enumeration in a nested name specifier is a C++11 extension [-Wc++11-extensions] Error() : type(ErrorType::NoError) {} ^ /home/conan/w/cci_PR-4363/.conan/data/keychain/1.2.0/_/_/package/5cdcdd67045eb3e5a5cc9da2de2c2a5ddb737fe6/include/keychain/keychain.h:126:36: warning: use of enumeration in a nested name specifier is a C++11 extension [-Wc++11-extensions] operator bool() const { return ErrorType::NoError != type; } ^ /home/conan/w/cci_PR-4363/4/d61c99e7-3f7f-465a-8b52-e551754e98f3/recipes/keychain/all/test_package/test_package.cpp:8:26: warning: use of enumeration in a nested name specifier is a C++11 extension [-Wc++11-extensions] return error.type == ErrorType::NoError ? 0 : 1; ^ 4 warnings generated.