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-4119/2/308c4e1b-6fe7-48d3-933a-bb18264f6868/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-4119/2/308c4e1b-6fe7-48d3-933a-bb18264f6868/recipes/libsrtp/all/test_package/build/81d33e8d23b0bd82c445d2c3ad4bf4bd140111eb' '--' '-j8'