Hi, 2016-05-10 12:14 GMT+02:00 Jo-Philipp Wich <j...@mein.io>: > > Hi, > > > I may be asking a stupid question, but why does the build system have to > > build everything every time. > > until recently this wasn't possible due to certain technical > limitations, some of which we already addressed [1]. > > > Under OpenWRT a typical build will take 12 - 16+ hours, of which 10+ > > will be spent building the packages. very few of which will have changed. > > Correct.
Is there a way to have per package build time? I know we have a lot of packages but maybe we can speed up some build if we know where to look (remove doc generation, ...) Regards Etienne > > > Would it be possible to split the base system and the packages into two > > separate builds in order to speed up the build process. > > We already did that [2], also see: > http://phase1.builds.lede-project.org/ > http://phase2.builds.lede-project.org/ > > > Would it be possible to build only those packages that have changed. I > > realize that if some underlying common source code has changed then all > > the affected apps will need to be rebuilt. However, if a linked library > > has changed why do we recompile, why not just re-link? > > Not at the moment. Implementing that would imply the ability to keep all > build trees on disk, we currently lack the resources to do so. > > Another approach is to rebuild single packages (plus their dependency > subtrees) using the SDK, then patch and re-sign the repository index > files in-place. This is an approach I used for binary security updates > in OpenWrt [3] but it has certain locking / race condition implications > as multiple parallel running builders need to patch the same repository > index files so it is rather hard to do correctly in a distributed manner. > > 1: > https://git.lede-project.org/?p=source.git;a=commit;h=5170393f8cae3c5acac61bd6ac6e127f9727cee4 > 2: https://git.lede-project.org/?p=buildbot.git;a=summary > 3: https://github.com/openwrt/buildscripts > > ~ Jo > > _______________________________________________ > Lede-dev mailing list > Lede-dev@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/lede-dev _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
