linux-kernel - Re: [PATCH] kbuild: Add environment variables for userprogs flags

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Message-ID: <CAK7LNATQ3oW0rQz0M5xvWGqYmFZPeB2bgrdLUBobCRVNvoWZyA@mail.gmail.com>
Date:   Thu, 27 Jan 2022 20:25:53 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Elliot Berman <quic_eberman@...cinc.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nathan Chancellor <nathan@...nel.org>,
        Fangrui Song <maskray@...gle.com>,
        Matthias Maennich <maennich@...gle.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        llvm@...ts.linux.dev
Subject: Re: [PATCH] kbuild: Add environment variables for userprogs flags

On Thu, Jan 27, 2022 at 3:21 AM Nick Desaulniers
<ndesaulniers@...gle.com> wrote:

>
> >
> >  config CC_HAS_ASM_GOTO
> >         def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))
> > diff --git a/usr/include/Makefile b/usr/include/Makefile
> > index 1c2ae1368079..6a8c7dd9ccaf 100644
> > --- a/usr/include/Makefile
> > +++ b/usr/include/Makefile
> > @@ -12,6 +12,9 @@ UAPI_CFLAGS := -std=c90 -Wall -Werror=implicit-function-declaration
> >  # It is here just because CONFIG_CC_CAN_LINK is tested with -m32 or -m64.
> >  UAPI_CFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS))
> >
> > +# USERCFLAGS might contain sysroot location for CC
> > +UAPI_CFLAGS += $(USERCFLAGS)
> > +
> Do we need to worry about USERLDFLAGS here, too? (or usr/Makefile?)


I do not think so.

usr/include/Makefile does not link the objects.

(  $(CC) -S   stops after the compilation stage)




--
Best Regards
Masahiro Yamada