[Buildroot] [PATCH] toolchain, glibc: Allow ARC big endian glibc builds

[Alexey Brodkin]

Hi Vineet,

> -----Original Message-----
> From: Vineet Gupta <vgupta at synopsys.com>
> Sent: Friday, November 1, 2019 10:04 PM
> To: buildroot at busybox.net
> Cc: linux-snps-arc at lists.infradead.org; Alexey Brodkin <abrodkin at synopsys.com>; Evgeniy Didin
> <didin at synopsys.com>; Vineet Gupta <vgupta at synopsys.com>
> Subject: [PATCH] toolchain,glibc: Allow ARC big endian glibc builds
> 
> Apparently big endian glibc builds just work, if we let the endian
> header allow that (which prev was #error).
> 
> So this patch bumps glibc to version which fixes the header (this
> hopefully will become arc-2019.09-release) and then enables arceb
> in glibc toolchain builds
> 
> Signed-off-by: Vineet Gupta <vgupta at synopsys.com>
> ---
>  package/glibc/glibc.mk                  | 2 +-
>  toolchain/toolchain-buildroot/Config.in | 3 ++-
>  2 files changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/package/glibc/glibc.mk b/package/glibc/glibc.mk
> index d46063c5d111..754408881397 100644
> --- a/package/glibc/glibc.mk
> +++ b/package/glibc/glibc.mk
> @@ -5,7 +5,7 @@
>  ################################################################################
> 
>  ifeq ($(BR2_arc),y)
> -GLIBC_VERSION =  arc-2019.03-release
> +GLIBC_VERSION = ec681dddfa99894513c85da7d5d257b60d04f915
>  GLIBC_SITE = $(call github,foss-for-synopsys-dwc-arc-processors,glibc,$(GLIBC_VERSION))
>  else ifeq ($(BR2_RISCV_32),y)
>  GLIBC_VERSION = 06983fe52cfe8e4779035c27e8cc5d2caab31531
> diff --git a/toolchain/toolchain-buildroot/Config.in b/toolchain/toolchain-buildroot/Config.in
> index c0612bf04176..587e097a9c92 100644
> --- a/toolchain/toolchain-buildroot/Config.in
> +++ b/toolchain/toolchain-buildroot/Config.in
> @@ -48,7 +48,8 @@ config BR2_TOOLCHAIN_BUILDROOT_GLIBC
>  		   BR2_powerpc     || BR2_powerpc64  || BR2_powerpc64le || \
>  		   BR2_riscv       || BR2_sh         || BR2_sparc64     || \
>  		   BR2_x86_64      || BR2_microblaze || BR2_nios2       || \
> -		   (BR2_arcle && BR2_ARC_ATOMIC_EXT) || BR2_csky
> +		   ((BR2_arcle || BR2_arceb) && BR2_ARC_ATOMIC_EXT)     || \
> +		   BR2_csky

I guess here we may just use "BR2_arc" which is set for both BR2_arcle && BR2_arceb,
see https://git.buildroot.org/buildroot/tree/arch/Config.in.arc#n54

-Alexey