linux-kernel - Re: [PATCH V9 2/4] kbuild: Add generic rule to apply fdtoverlay

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Date:   Wed, 3 Mar 2021 16:26:32 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        David Gibson <david@...son.dropbear.id.au>,
        Frank Rowand <frowand.list@...il.com>,
        Michal Simek <michal.simek@...inx.com>,
        Anmar Oueja <anmar.oueja@...aro.org>,
        Bill Mills <bill.mills@...aro.org>,
        Rob Herring <robh@...nel.org>,
        linux-kbuild <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V9 2/4] kbuild: Add generic rule to apply fdtoverlay

On 03-03-21, 11:49, Geert Uytterhoeven wrote:
> Hi Viresh,
> 
> On Wed, Mar 3, 2021 at 5:36 AM Viresh Kumar <viresh.kumar@...aro.org> wrote:
> > From: Rob Herring <robh@...nel.org>
> >
> > Add a generic rule to apply fdtoverlay in Makefile.lib, so every
> > platform doesn't need to carry the complex rule.
> >
> > The platform's Makefile only needs to have this now:
> >
> >  DTC_FLAGS_foo_base += -@
> >  foo-dtbs := foo_base.dtb foo_overlay1.dtbo foo_overlay2.dtbo
> >  dtb-y := foo.dtb
> 
> Is there a way to autogenerate the DTC_FLAGS_foo_base rule, based on
> the foo-dtbs rule?

Since the first entry in "foo-dtbs" is always going to be the only
base file, maybe we can do that.

-- 
viresh