Nightly verification script modifies CONFIG_CROSS_COMPILE in the .config file
before build Linux - little or big endian doesn't matter, so path to tools is
always correct. It sets full path in .config, instead of prepending PATH.
CONFIG_CPU_BIG_ENDIAN is set accordingly.
--------8<--------
# Generate proper .config file from defconfig
make $MAKEFLAGS -C $src_dir/linux O=$odir ARCH=arc olddefconfig
# Set toolchain path
sed -i \
-e
"s|CONFIG_CROSS_COMPILE=\".*\"|CONFIG_CROSS_COMPILE=\"$build_dir/$target_toolchain/bin/$target_prefix\"|"
\
$odir/.config
# Set proper endianness. It's necessary to set it explicitly because
# we are not sure what value for CONFIG_CPU_BIG_ENDIAN flag is set
# because of impact of allnoconfig or allyesconfig configurations.
if [ $target_endian = eb ]; then
kconfig_enable_option $odir CONFIG_CPU_BIG_ENDIAN
else
kconfig_disable_option $odir CONFIG_CPU_BIG_ENDIAN
fi
# Regenerate .config with new CONFIG_CPU_BIG_ENDIAN option value. It's
# necessary because this option may be not presented in platforms defconfigs
# thus sed cannot fix it before generating the first version of .config.
make $MAKEFLAGS -C $src_dir/linux O=$odir ARCH=arc olddefconfig
--------8<--------
Anton
> -----Original Message-----
> From: Vineet Gupta [mailto:vgu...@synopsys.com]
> Sent: Friday, March 11, 2016 9:53 AM
> To: Vineet Gupta <vineet.gup...@synopsys.com>; Anton Kolesov
> <anton.kole...@synopsys.com>; Alexey
> Brodkin <alexey.brod...@synopsys.com>; Noam Camus <no...@ezchip.com>
> Cc: arcml <linux-snps-arc@lists.infradead.org>
> Subject: Re: big endian builds
>
> On Friday 11 March 2016 12:18 PM, Vineet Gupta wrote:
> > So for big endian kernel builds, just selecting the CONFIG_CPU_BIG_ENDIAN
> > is not
> > sufficient, we also need to manually change the CROSS_COMPILE prefix to
> > arceb-xxx.
> >
> > @Anton, is that what you do for verification builds !
> >
> > @Noam I presume your defconfig has CONFIG_CROSS_COMPILE or you have set in
> > env
> > variable ?
> >
> >
> > The kernel build system needs to take take care of that. Do you guys have
> > issues
> > with patch below
> >
> > ------------>
> > diff --git a/arch/arc/Makefile b/arch/arc/Makefile
> > index c8230f3395f2..4abcdb89e391 100644
> > --- a/arch/arc/Makefile
> > +++ b/arch/arc/Makefile
> > @@ -9,8 +9,12 @@
> > UTS_MACHINE := arc
> >
> > ifeq ($(CROSS_COMPILE),)
> > +ifndef CONFIG_CPU_BIG_ENDIAN
> > +CROSS_COMPILE := arceb-linux-
> > +else
>
> Please pardon this nonsense as lack of caffeine - despite the obvious fixup, I
> still need to change the .config.
> I think we need to revert the defconfig patch for fixing the CROSS_COMPILE
> prefix
> after all !
>
> > CROSS_COMPILE := arc-linux-
> > endif
> > +endif
> >
> >
> > _______________________________________________
> > linux-snps-arc mailing list
> > linux-snps-arc@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-snps-arc
> >
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