[Buildroot] [PATCH 1/3] toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_97208

[Giulio Benetti]

Hi,

> Il giorno 13 ago 2021, alle ore 23:38, Giulio Benetti <giulio.benetti at benettiengineering.com> ha scritto:
> 
> lmbench package fails to build for the Microblaze architecture with
> optimization enabled with gcc = 11.1.0:

^^^ ‘gcc <= 11’, not only =

> http://autobuild.buildroot.net/results/ae1/ae1e4d61ed367c6cb64442c60d98882cc7985346/
> 
> It's been reported upstream by Romain Naour:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97208
> 
> Cc: Roman Naour <romain.naour at gmail.com>
> Signed-off-by: Giulio Benetti <giulio.benetti at benettiengineering.com>
> ---
> toolchain/Config.in | 7 +++++++
> 1 file changed, 7 insertions(+)
> 
> diff --git a/toolchain/Config.in b/toolchain/Config.in
> index 3888eeafe2..1dae0cb2cc 100644
> --- a/toolchain/Config.in
> +++ b/toolchain/Config.in
> @@ -163,6 +163,13 @@ config BR2_TOOLCHAIN_HAS_GCC_BUG_93847
>    bool
>    default y if BR2_nios2 && !BR2_TOOLCHAIN_GCC_AT_LEAST_9
> 
> +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97208
> +# ICE: in extract_insn, at recog.c:2294 on microblaze.
> +# This bug still exists in gcc = 11.1.0
> +config BR2_TOOLCHAIN_HAS_GCC_BUG_97208
> +    bool
> +    default y if BR2_microblaze
> +
> # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99410
> # Error: branch offset out of range on Nios II. This bug
> # no longer exists in gcc >= 9.x.
> -- 
> 2.25.1
>