On Sat, May 27, 2017 at 11:18 AM, Jed Brown <j...@jedbrown.org> wrote: > Is it possible (without recursive make) to have make start building > these other Fortran modules as soon as their dependencies are met > instead of only after all the independent objects (from C sources) have > been built?
I'm curious about this too. We had a similar issue at Mozilla recently where the long pole was scheduled at the end of the build, but only when building in parallel. It seems that make switches from a depth-first search when building with -j1 to a breadth-first search when building with -j2+. We worked around it by moving around the dependencies so the long pole in the build was at a depth of 0, but it sounds like that won't help in your case. Unfortunately no amount of reordering dependencies will help, since it seems to be primarily driven by the depth of the target. Here's some background info: https://bugzilla.mozilla.org/show_bug.cgi?id=1262241#c5 If there is a setting somewhere to tweak the scheduler to use a DFS in parallel mode, I think that would help make use of all the cores for the duration of the build. -Mike _______________________________________________ Help-make mailing list Help-make@gnu.org https://lists.gnu.org/mailman/listinfo/help-make
