linux-kernel - Re: [RFC 1/3] kbuild: add support for ensuring headers are self-contained

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Message-ID: <CAK7LNASWsd-MSUtD69O05EZsVhcJTj7dh92MASzUoYR_it66AQ@mail.gmail.com>
Date:   Tue, 4 Jun 2019 09:20:43 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     Jani Nikula <jani.nikula@...el.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        intel-gfx@...ts.freedesktop.org,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: Re: [RFC 1/3] kbuild: add support for ensuring headers are self-contained

Hi Sam, Jani,

On Tue, Jun 4, 2019 at 2:33 AM Sam Ravnborg <sam@...nborg.org> wrote:
>
> Hi Masahiro/Jani.
>
> >
> > Following the obj-y pattern,
> > I want to make header-test-y relative to $(obj).
>
> I also considered this and agree this is better.
>
> Otherwise we end up with a spaghetti of dependencies across the tree.
>
> What I made just fit the purpose I had that day,
> which is no excuse for bad design.
>
> > I prefer this:
> >
> > quiet_cmd_header_test = HDRTEST $@
> >       cmd_header_test = echo "\#include \"$*.h\"" > $@
> >
> > $(obj)/%.header_test.c:
> >         $(call cmd,header_test)
>
> Even better - good.
>
> We call it HDRTEST - so why not just go for that name:
>
>     hdrtest-y += headerfile.h
>
> ??
>
> The current proposal with "header-test-y" hurts the eye a little with
> two '-', and all other variables uses only one '-' as is today.
> (generic-y, obj-y etc).
>
> This is bikeshedding but is was itcing me a little.

I do not have a strong opinion.
I leave it to Jani. Either is fine with me.


There are variables that contain two '-'.
'no-clean-files', 'subdir-ccflags-y', etc.


--
Best Regards
Masahiro Yamada