[Buildroot] [PATCH 1/1] toolchain/toolchain-buildroot: PPC64 support in musl requires ALTIVEC

Matthew Weber matthew.weber at rockwellcollins.com
Fri Jan 31 15:11:25 UTC 2020


Vincent,

On Fri, Jan 31, 2020 at 8:56 AM Romain Naour <romain.naour at smile.fr> wrote:
>
> Hi Vincent,
>
> Le 31/01/2020 à 15:41, Vincent Fazio a écrit :
> > musl assumes all PPC64(LE) CPUs support ALTIVEC instructions. However,
> > the e5500 does not support ALTIVEC so builds targeting this CPU using
> > musl will generate illegal instructions.
> >
> > Disable musl if the PPC64(LE) CPU does not support ALTIVEC instructions.
>
> Thanks for this patch.

Thanks as well for the patch.  It actually applies to both LE and BE
e5500 targets

>
> Can you add these two links from my toolchains-builder instance:
> https://gitlab.com/kubu93/toolchains-builder/-/jobs/418092743
> https://gitlab.com/kubu93/toolchains-builder/-/jobs/418092744
>
> Also I'm adding Matt in Cc:
>
> Best regards,
> Romain
>
> >
> > Signed-off-by: Vincent Fazio <vfazio at xes-inc.com>
> > ---
> >  toolchain/toolchain-buildroot/Config.in | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/toolchain/toolchain-buildroot/Config.in b/toolchain/toolchain-buildroot/Config.in
> > index a980f766ac..09a46822c9 100644
> > --- a/toolchain/toolchain-buildroot/Config.in
> > +++ b/toolchain/toolchain-buildroot/Config.in
> > @@ -83,8 +83,10 @@ config BR2_TOOLCHAIN_BUILDROOT_MUSL
> >       bool "musl"
> >       depends on BR2_aarch64     || BR2_arm   || BR2_armeb   || BR2_i386 || \
> >                  BR2_microblaze  || BR2_mips  || BR2_mipsel  || BR2_mips64 || \
> > -                BR2_mips64el    || BR2_or1k  || BR2_powerpc || BR2_powerpc64 || \
> > -                BR2_powerpc64le || BR2_RISCV_64 || BR2_sh   || BR2_x86_64
> > +                BR2_mips64el    || BR2_or1k  || BR2_powerpc || BR2_RISCV_64 || \
> > +                BR2_sh          || BR2_x86_64 || \
> > +                ((BR2_powerpc64 || BR2_powerpc64le) && BR2_POWERPC_CPU_HAS_ALTIVEC)
> > +                # musl assumes all PPC64 targets support ALTIVEC instructions
> >       depends on !BR2_powerpc_SPE # not supported, build breaks
> >       # sh2 nommu is supported by musl, but we don't have support
> >       # for it in Buildroot.
> >
>


-- 

Matthew Weber | Associate Director Software Engineer | Commercial Avionics

COLLINS AEROSPACE

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