On Tuesday, 7 September 2021 10:57:38 PDT Konstantin Tokarev wrote: > If generated makefiles were non-recursive, it would be even faster.
Right. There are a couple of points during the build that the processor is idle waiting for something to finish building before the next thing can start. There's a critical path dependency chain going through the bootstrap library, moc, then QtCore that affects both buildsystems. There's no workaround for that. qtbase/src's qmake file was hand-rolled to make sure that we did have the minimum number of dependencies in the critical path. That extends to bundled, third-party sources if you need them. All of that had to be manually- maintained (see [1]). With CMake, we got that for free, since it resolves the dependencies on its own. [1] https://code.qt.io/cgit/qt/qtbase.git/log/src/src.pro?h=5.15 -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel DPG Cloud Engineering _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
