If you want to do a clean rebuild you can do the following: ninja clean or cmake --build <build_dir> --target clean ninja or cmake --build <build_dir> -j N
On Wed, Oct 9, 2019 at 12:00 PM Nagurne, James <j-nagu...@ti.com> wrote: > > That's the piece of the puzzle I was missing. Thank you! > > Yes, I had deleted the cache because I thought that would force a complete > regeneration. I'm using a rather complicated system of ExternalProjects > (LLVM), so I figured it was the quickest way to essentially force cmake to > start from the beginning and reload those cache files without invalidating > and forcing a rebuild of the executables and libraries I had already built > > Is there a way to do what I was looking for? I wouldn't be surprised if there > wasn't, since removing those very fundamental building blocks might as well > just be an rm -rf ./* > > JB > > -----Original Message----- > From: Robert Maynard [mailto:robert.mayn...@kitware.com] > Sent: Wednesday, October 9, 2019 7:16 AM > To: Nagurne, James > Cc: cmake@cmake.org > Subject: [EXTERNAL] Re: [CMake] CMake and Ninja, RERUN_CMAKE useless? > > The default generator and all other associated information ( '-D' ) is > kept in the CMakeCache.txt file in the root of the build directory. > The execution of `cmake -S <source_dir> -B <binary_dir>` will reload > this cache before doing anything else. Have you verified that your > build directory hasn't deleted this file? > > On Tue, Oct 8, 2019 at 8:31 PM Nagurne, James via CMake <cmake@cmake.org> > wrote: > > > > Hi all, > > > > > > > > My question comes from a Ninja generator build system, and is specifically > > about an internal rule generated by cmake. > > > > What is the purpose of the RERUN_CMAKE rule generated by CMake with a Ninja > > generator? > > > > > > > > In the current repo, the only reference to this rule is in > > WriteTargetRebuildManifest here > > > > At line 1285, the rule is written out, seemingly as-is. > > > > > > > > According to lines 1274 to 1284, the only actual behavior of this command, > > which is executed whenever the source CMakeLists.txt file, files included > > from the CMakeLists, and some other CMake installation files change, is: > > > > cmake -S <source_dir> -B <binary_dir> > > > > > > > > This seems completely insufficient for “re-running” cmake. The most obvious > > flaw is the absence of the generator. When I’ve seen this rule fire, my > > Ninja build system adds a useless Makefile to the build system, and then > > (hopefully) continues building as if nothing had been done at all, without > > so much as inspecting that Makefile. > > > > > > > > What about command-line arguments like -D? > > > > > > > > Am I missing the purpose of this rule or potentially doing something > > non-standard? The reason I send an email is because this behavior is > > sending my project into a cmake loop where it detects build.ninja is out of > > date, re-runs cmake to generate a Makefile instead of a ninja build system, > > and then infinitely repeats because it never actually re-ran anything. > > > > > > > > Thanks, > > > > JB > > > > Code Generation > > > > Texas Instruments > > > > -- > > > > 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 -- 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
