[Buildroot] [PATCH] package/gcc: don't build a toolchain for powerpc with spe ABI with gcc >= 8.x

[Matthew Weber]

Romain,


On Sun, May 26, 2019 at 3:15 PM Romain Naour <romain.naour at gmail.com> wrote:
>
> The powerpc*-*-*spe* support has been deprecated in GCC 8 [1] and has
> been removed in GCC 9 [2].
>
> While building with GCC 8, the build stop since we don't provide --enable-obsolete
> option.
>
> For now, keep powerpcspe support in Buildroot but only for older compiler
> up to GCC 7.
>
> Note: Although we can't select Glibc for powerpcspe since commit [4], this
> support has been removed for the next version of Glibc (the upcoming 2.30).
>
> [1] https://gcc.gnu.org/ml/gcc/2018-04/msg00102.html
> [2] https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=b31d0348ddada49453e3edaaf93a423fdc61dc79
> [3] https://sourceware.org/git/?p=glibc.git;a=commit;h=a053e878494080f7070cf92890e546057236c9c9
> [4] https://git.buildroot.net/buildroot/commit/?id=5777e3ffd99132a57e3d29659850eec14b1625f8
>
> Signed-off-by: Romain Naour <romain.naour at gmail.com>
> Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>

Reviewed-by: Matt Weber <matthew.weber at rockwellcollins.com>

Thanks for sending the patch.  I hadn't got one sent out after I ran
into this while attempting to build an updated e500v1 toolchain.   To
bad we've hit end of life (products still viable with these processors
into the mid 20's)...

> ---
>  package/gcc/Config.in.host | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host
> index 8e22a4c155..b477fe56e7 100644
> --- a/package/gcc/Config.in.host
> +++ b/package/gcc/Config.in.host
> @@ -66,6 +66,9 @@ config BR2_GCC_VERSION_8_X
>         bool "gcc 8.x"
>         # Broken or unsupported architectures
>         depends on !BR2_or1k
> +       # powerpc spe support has been deprecated since gcc 8.x.
> +       # https://gcc.gnu.org/ml/gcc/2018-04/msg00102.html
> +       depends on !BR2_powerpc_SPE
>         select BR2_TOOLCHAIN_GCC_AT_LEAST_8
>
>  endchoice
> --
> 2.21.0
>
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-- 

Matthew Weber | Pr. Software Engineer | Commercial Avionics

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