On 03/15/2016 10:48 AM, Attila Krasznahorkay wrote: > https://cmake.org/pipermail/cmake-developers/2015-December/027197.html > > With the following patch, when setting the CMAKE_ONLY_IN_SOURCE_DEPENDENCIES > variable to 1/ON/TRUE, this file size goes down to just a few kilobytes. > Speeding up our build noticeably.
Thanks. As Ben pointed out in the original thread the build tree should be included as well. Perhaps a name like CMAKE_DEPENDS_IN_PROJECT_ONLY could be used to indicate that it includes only dependencies in the project directories (source or build tree). > As far as I can see, the "cmake -E cmake_depends" call is only used by > the Makefile generator at the moment. So I only taught that generator > about this new variable. The Makefile generator is the only one for which CMake takes responsibility for implicit dependency scanning. > I just didn't see what I should do in the Ninja generator for instance > to apply this setting. Even though I would be very interested in implementing > the feature in that generator as well. The Ninja generator uses the compiler's information about dependencies as generated by options like `gcc -MD`. Since that occurs along with the compilation there is little cost to including all dependencies except for stat during rebuilds. See discussion here: https://cmake.org/Bug/view.php?id=14914 about the opposite use case (including system dependencies instead of excluding them). > + infoFileStream > + << "set(CMAKE_ONLY_IN_SOURCE_DEPENDENCIES " > + << ( this->Makefile->IsOn( "CMAKE_ONLY_IN_SOURCE_DEPENDENCIES" ) ? > + "1" : "0" ) > + << ")\n"; Rather than communicating this to the dependency scanning step and doing the filtering there, please look at applying the filter during generation of CMAKE_<LANG>_TARGET_INCLUDE_PATH. Thanks, -Brad -- 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: http://public.kitware.com/mailman/listinfo/cmake-developers
