linux-kernel - Re: [PATCH 1/3] um: fix parallel building with O= option

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Date:   Tue, 18 Sep 2018 13:01:48 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>,
        linux-um@...ts.infradead.org, Randy Dunlap <rdunlap@...radead.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Sam Ravnborg <sam@...nborg.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] um: fix parallel building with O= option

Hi Kees,


2018-09-16 3:47 GMT+09:00 Kees Cook <keescook@...omium.org>:
> On Fri, Aug 3, 2018 at 9:47 PM, Masahiro Yamada
> <yamada.masahiro@...ionext.com> wrote:
>> Randy Dunlap reports UML occasionally fails to build with -j<N> and
>> O=<builddir> options.
>
> With v4.19-rc2 I'm still seeing a failure (for any parallelism) under ARCH=um
>
> $ make -j8 ARCH=um O=/tmp/foo
> ...
> /home/kees/src/linux-build/um/Makefile:1185: *** Headers not
> exportable for the um architecture.  Stop.
>
> Am I missing something?


This is a different problem.

I sent a patch:
https://patchwork.kernel.org/patch/10603707/



-- 
Best Regards
Masahiro Yamada