The following issue has been SUBMITTED. ====================================================================== http://www.cmake.org/Bug/view.php?id=14963 ====================================================================== Reported By: Brad King Assigned To: ====================================================================== Project: CMake Issue ID: 14963 Category: (No Category) Reproducibility: have not tried Severity: minor Priority: normal Status: new ====================================================================== Date Submitted: 2014-06-09 09:17 EDT Last Modified: 2014-06-09 09:17 EDT ====================================================================== Summary: Add explicit specification of custom command side effect outputs Description: A common idiom in CMake-based build systems is to use order-only dependencies on high-level targets to implicitly ensure their side effects are up to date, and then to have other build rules depend on those side effects explicitly.
This works well in the VS, Xcode, and Makefile generators because the underlying build systems all evaluate rules at the granularity of the high-level targets so dependencies are not stat-ed from the filesystem until after the order-only dependencies are satisified. It does not work well in the Ninja generator because ninja does not re-stat dependencies of a rule after its order-only dependencies have been satisfied: https://github.com/martine/ninja/issues/760 This behavior is not necessarily wrong because nothing in the generated ninja build system tells ninja what build rules generate the side effects. With a bit more information from the CMakeLists.txt code we can generate a ninja build system that works correctly for such cases. ====================================================================== Issue History Date Modified Username Field Change ====================================================================== 2014-06-09 09:17 Brad King New Issue ====================================================================== -- 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/cgi-bin/mailman/listinfo/cmake-developers
