On Wed, Jun 17, 2015, at 10:24 AM, Alex wrote: > Just curious as to how the build system knows which directories to > process the Makefiles in them? I've seen some moz.build files reference > them with CONFIGURE_SUBST_FILES += ['Makefile'], but then some > directories such as the root SpiderMonkey directory (js/src) have > Makefiles but with no reference to them from the moz.build file of said > directory.
Here's the full story: 1) configure runs config.status: https://dxr.mozilla.org/mozilla-central/source/configure.in#9357 2) config.status calls BuildReader.read_topsrcdir: https://dxr.mozilla.org/mozilla-central/source/python/mozbuild/mozbuild/config_status.py#136 3) read_topsrcdir starts with the moz.build in $topsrcdir: https://dxr.mozilla.org/mozilla-central/source/python/mozbuild/mozbuild/frontend/reader.py#865 4) read_mozbuild evaluates moz.build files, taking any directories listed in DIRS and evaluating them as it goes: https://dxr.mozilla.org/mozilla-central/source/python/mozbuild/mozbuild/frontend/reader.py#1017 5) After all the moz.build files have been read, the RecursiveMakeBackend processes the definitions from them: https://dxr.mozilla.org/mozilla-central/source/python/mozbuild/mozbuild/config_status.py#149 6) Any Makefiles referenced in CONFIGURE_SUBST_FILES are handled during this traversal: https://dxr.mozilla.org/mozilla-central/source/python/mozbuild/mozbuild/backend/recursivemake.py#442 7) At the end of that process, any Makefile.in files that exist alongside a moz.build file in the srcdir get processed into a Makefile in the objdir: https://dxr.mozilla.org/mozilla-central/source/python/mozbuild/mozbuild/backend/recursivemake.py#747 Hope that helps, -Ted _______________________________________________ dev-builds mailing list dev-builds@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-builds
