linux-kernel - Re: [PATCH v2 1/2] kbuild: Always validate DT binding examples

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Date:   Tue, 21 Apr 2020 14:31:19 -0500
From:   Rob Herring <robh@...nel.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] kbuild: Always validate DT binding examples

On Tue, Apr 21, 2020 at 11:57 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> Hi Rob,
>
>
> On Tue, Apr 21, 2020 at 11:01 PM Rob Herring <robh@...nel.org> wrote:
> > >
> > > It seems to only fail with out of tree builds (O=...). I expect that
> > > failures will become more common the more YAML bindings we have, even
> > > without long directory names.
> >
> > dt-mk-schema can take and recurse a single directory already, so does
> > this fix it for you:
> >
> > @@ -22,7 +22,7 @@ $(obj)/%.example.dts: $(src)/%.yaml
> > check_dtschema_version FORCE
> >  DT_TMP_SCHEMA := $(obj)/processed-schema-examples.yaml
> >
> >  quiet_cmd_mk_schema = SCHEMA  $@
> > -      cmd_mk_schema = $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@
> > $(real-prereqs)
> > +      cmd_mk_schema = $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@
> > $(srctree)/$(src)
>
>
> I am just curious.
>
> How come the tool excludes 'processed-schema*' and '*.example.dt.yaml'
> from $(srctree)/$(src) ?

Uggg, it wouldn't. Can't everyone build out of tree. ;) I guess the options are:

- Call dt-mk-schema on each file individually appending the result
- Make dt-mk-schema take stdin or a file with a list of files as
Masahiro suggested

I'd like to avoid a dt-mk-schema change so I'll try to make the former
work. It's only been a day since adding a minimum version. :(

Rob