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

[Masahiro Yamada]

On Sun, May 17, 2020 at 9:33 PM David Laight <David.Laight@xxxxxxxxxx> 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
>
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-- 
Best Regards
Masahiro Yamada