On Wed, Jun 17, 2015 at 9:15 AM, Ted Mielczarek <t...@mielczarek.org> wrote:
> > > 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 > ted, gps: where should this go in the documentation? Even better, is it already there? Nick
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