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arch: drop support for ARC big-endian

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Alexey Brodkin from Synopsys says in [1]:

  I think indeed, we may remove all the big-endian support for ARC.
  Reasons are since introduction of ARC HS4x processors we no longer
  support big-endian in any new processor IP, and even for older IP
  which used to support big-endian it was rarely used... so basically
  there's no good justification to spend any cycles on big-endian
  support looking forward in this project.  I.e. BE support in uClibc
  could also be removed if it makes any difference.

Therefore, let's removed support for ARC big-endian.

[1] https://lore.kernel.org/buildroot/SJ2PR12MB818487232470DA4456967C73A1A3A@SJ2PR12MB8184.namprd12.prod.outlook.com/

Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Cc: ARC Maintainers <arc-buildroot@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: Maxim Kochetkov <fido_max@inbox.ru>
[Julien:
 - move legacy option to 2026.02 section
 - add link to mailing list
 - remove BR2_arceb from pkg-meson.mk to fix check-symbols error
]
Signed-off-by: Julien Olivain <ju.o@free.fr>
This commit is contained in:
Thomas Petazzoni
2025-12-11 17:16:15 +01:00
committed by Julien Olivain
parent 0f303f3abc
commit 2d570f8369
15 changed files with 24 additions and 31 deletions
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4
toolchain/toolchain-external/pkg-toolchain-external.mk
View File

@@ -237,10 +237,6 @@ ifeq ($(BR2_mips)$(BR2_mips64),y)
TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_MIPS_TARGET_BIG_ENDIAN
TOOLCHAIN_EXTERNAL_CFLAGS += -EB
endif
ifeq ($(BR2_arceb),y)
TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_ARC_TARGET_BIG_ENDIAN
TOOLCHAIN_EXTERNAL_CFLAGS += -EB
endif
TOOLCHAIN_EXTERNAL_CFLAGS += $(call qstrip,$(BR2_TARGET_OPTIMIZATION))

3
toolchain/toolchain-external/toolchain-external-synopsys-arc/Config.in.options
View File

@@ -33,8 +33,7 @@ config BR2_TOOLCHAIN_EXTERNAL_SYNOPSYS_ARCHS_GLIBC
endchoice
config BR2_TOOLCHAIN_EXTERNAL_PREFIX
default "arc-linux" if BR2_arcle
default "arceb-linux" if BR2_arceb
default "arc-linux"
config BR2_PACKAGE_PROVIDES_TOOLCHAIN_EXTERNAL
default "toolchain-external-synopsys-arc"