linux-kernel - Re: [PATCH v2] uml: make CONFIG_STATIC

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Date:   Fri, 24 Jan 2020 14:03:55 -0800
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        James McMechan <james_mcmechan@...mail.com>,
        linux-um <linux-um@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        David Gow <davidgow@...gle.com>
Subject: Re: [PATCH v2] uml: make CONFIG_STATIC_LINK actually static

On Thu, Jan 23, 2020 at 11:51 PM Geert Uytterhoeven
<geert@...ux-m68k.org> wrote:
>
> Hi Brendan,
>
> On Fri, Jan 24, 2020 at 12:59 AM Brendan Higgins
> <brendanhiggins@...gle.com> wrote:
> > Currently, CONFIG_STATIC_LINK can be enabled with options which cannot
> > be statically linked, namely UML_NET_VECTOR, UML_NET_VDE, and
> > UML_NET_PCAP; this is because glibc tries to load NSS which does not
> > support being statically linked. So make CONFIG_STATIC_LINK depend on
> > !UML_NET_VECTOR && !UML_NET_VDE && !UML_NET_PCAP.
> >
> > Link: https://lore.kernel.org/lkml/f658f317-be54-ed75-8296-c373c2dcc697@cambridgegreys.com/#t
> > Signed-off-by: Brendan Higgins <brendanhiggins@...gle.com>
> > ---
> > Changes since last revision:
> >
> > Incorporated Geert Uytterhoeven's suggestion of using a separate
> > FORBID_STATIC_LINK config option that each driver incompatible with
> > static linking selects.
> > ---
> >  arch/um/Kconfig         | 7 +++++++
> >  arch/um/drivers/Kconfig | 3 +++
> >  2 files changed, 10 insertions(+)
> >
> > diff --git a/arch/um/Kconfig b/arch/um/Kconfig
> > index 0917f8443c285..27a51e7dd59c6 100644
> > --- a/arch/um/Kconfig
> > +++ b/arch/um/Kconfig
> > @@ -62,8 +62,12 @@ config NR_CPUS
> >
> >  source "arch/$(HEADER_ARCH)/um/Kconfig"
> >
> > +config FORBID_STATIC_LINK
> > +       def_bool n
>
>     bool
>
> ("n" is the default)

Whoops, I always forget that.

Thanks for catching that!

> > +
> >  config STATIC_LINK
> >         bool "Force a static link"
> > +       depends on !FORBID_STATIC_LINK
> >         default n
>
> "default n" is the default (preexisting)

I'll go ahead and fix that too, then.

Thanks!