On Mon, Feb 18, 2019 at 9:35 AM Domen Vrankar <domen.vran...@gmail.com> wrote:
> Hi, > > I'm building llvm project with CMake. > While build process is compiling the code I prefer running "make -j3" on > my 4 core pc (bumping processor to 100% on 3 of 4 cores and using up ~5 GB > of ram - part of it is system and not build related). > While build process is linking I must run "make" with a single job because > otherwise I run out of memory (cores do little work but ram usage goes past > 23 GB). > > Currently I'm handling this so that I first run "make -j3" and once I get > to about 90% (first larger linking) I hit ctrl+c and run "make". > > Is there a feature in CMake that would support handling this transition of > parallel builds, sequential linking out of the box? > (while I'm mostly interested in Linux/make support, having the same > feature for Windows/nmake/ninja through the same command line cmake command > would be even better) > This is available for Ninja with the JOB_POOL_LINK <https://cmake.org/cmake/help/latest/prop_tgt/JOB_POOL_LINK.html> target property, the default for which can be set project-wide with the CMAKE_JOB_POOL_LINK <https://cmake.org/cmake/help/latest/variable/CMAKE_JOB_POOL_LINK.html> variable. You can control the number of parallel jobs for a given pool with the JOB_POOLS <https://cmake.org/cmake/help/latest/prop_gbl/JOB_POOLS.html> global property. -- Craig Scott Melbourne, Australia https://crascit.com Get the hand-book for every CMake user: Professional CMake: A Practical Guide <https://crascit.com/professional-cmake/>
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