linux-kernel - Re: [PATCH 09/29] kbuild: disallow multi-word in M= or KBUILD

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Message-ID: <CAK7LNAQNyD-1-tHkjgc3_cG2XGbLN7rmPM4m371iO2eWAfX55Q@mail.gmail.com>
Date:   Thu, 21 May 2020 12:57:31 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     David Laight <David.Laight@...lab.com>
Cc:     "linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>,
        Jessica Yu <jeyu@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 09/29] kbuild: disallow multi-word in M= or KBUILD_EXTMOD

On Sun, May 17, 2020 at 9:33 PM David Laight <David.Laight@...lab.com> wrote:
>
> From: Masahiro Yamada
> > Sent: 17 May 2020 10:49
> > $(firstword ...) in scripts/Makefile.modpost was added by commit
> > 3f3fd3c05585 ("[PATCH] kbuild: allow multi-word $M in Makefile.modpost")
> > to build multiple external module directories.
> >
> > This feature has been broken for a while. Remove the bitrotten code, and
> > stop parsing if M or KBUILD_EXTMOD contains multiple words.
>
> ISTR that one of the kernel documentation files says that it is possible
> to build multiple modules together in order to avoid 'faffing' with
> exported symbol lists.
>
> So the docs need updating to match.


Do you remember which doc mentions it?



>         David
>
> -
> Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
> Registration No: 1397386 (Wales)
>


-- 
Best Regards
Masahiro Yamada