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 /Users/jenkins/w/cci_PR-4119@2/2/3a5aa86c-59e7-4dd4-92cc-d043fed590c2/recipes/libsrtp/all/test_package/test_package.cpp:28:16: error: use of undeclared identifier 'nullptr' policy.next = nullptr; ^ 1 error generated. make[2]: *** [CMakeFiles/test_package.dir/test_package.cpp.o] Error 1 make[1]: *** [CMakeFiles/test_package.dir/all] Error 2 make: *** [all] Error 2 ERROR: libsrtp/2.3.0 (test package): Error in build() method, line 12 cmake.build() ConanException: Error 2 while executing cmake --build '/Users/jenkins/w/cci_PR-4119@2/2/3a5aa86c-59e7-4dd4-92cc-d043fed590c2/recipes/libsrtp/all/test_package/build/9e42aa12ef98c5426c451b0cbf0efbef141747ec' '--' '-j8'