Le mar. 27 nov. 2018 à 14:50, Mario Emmenlauer <ma...@emmenlauer.de> a écrit :
> > Dear all, > > I've just discovered that option() behaves differently than I anticipated. > After reading the docs and searching with google I'm still confused how to > achieve my desired behaviour. > > What I've just learned is that unspecified options take their cached value > and do *not* go back to their default value, if a cache exists. I assumed > that options take their default when not explicitly specified. > The behavior of option() gained new behavior in CMake 3.13. May be it could help in your particular case: https://cmake.org/cmake/help/v3.13/policy/CMP0077.html#policy:CMP0077 you'll depend on latest CMake though. > > Now my problem: I could not find a way to get the behaviour I'd like. Is it > possible to enforce the default for an option when its not specified by the > user, even if a cache exists? > You mean you did not manage to force the cache value? You can: set(VAR "default_value" CACHE FORCE) or the problem is you cannot know whether if a value has been user-provided? > I tried to unset() the option from the cache but that does not do what I'd > like. > > All the best, > > Mario Emmenlauer > -- > > Powered by www.kitware.com > > Please keep messages on-topic and check the CMake FAQ at: > http://www.cmake.org/Wiki/CMake_FAQ > > Kitware offers various services to support the CMake community. For more > information on each offering, please visit: > > CMake Support: http://cmake.org/cmake/help/support.html > CMake Consulting: http://cmake.org/cmake/help/consulting.html > CMake Training Courses: http://cmake.org/cmake/help/training.html > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Follow this link to subscribe/unsubscribe: > https://cmake.org/mailman/listinfo/cmake > -- Eric
-- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake
