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arch: add option to disable internal toolchain backend

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Some architectures or specific cores do not have support in upstream
gcc. Currently, they are individually listed as exclusions in the
toolchain choice.

This poses a maintainance burden, as the knowledge about what gcc
version supports what architecture is split across many places: the
toolchain choice, the gcc version choice, the external toolchains.

As a first step, add a blind option that architectures or individual
cores may select to indicate they lack support in our internal backend.

Actual use of the option will come in followup patches.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Yann E. MORIN 2017-09-03 11:22:16 +02:00 committed by Thomas Petazzoni
parent c224ac2e22
commit 31a726122f
2 changed files with 11 additions and 0 deletions
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10
arch/Config.in
View File

@ -250,6 +250,16 @@ config BR2_xtensa
endchoice
# For some architectures or specific cores, our internal toolchain
# backend is not suitable (like, missing support in upstream gcc, or
# no ChipCo fork exists...)
config BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT
bool
config BR2_ARCH_HAS_TOOLCHAIN_BUILDROOT
bool
default y if !BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT
# The following string values are defined by the individual
# Config.in.$ARCH files
config BR2_ARCH

1
toolchain/Config.in
View File

@ -43,6 +43,7 @@ choice
config BR2_TOOLCHAIN_BUILDROOT
bool "Buildroot toolchain"
select BR2_TOOLCHAIN_HAS_SHADOW_PASSWORDS
depends on BR2_ARCH_HAS_TOOLCHAIN_BUILDROOT
depends on !BR2_bf606
depends on !BR2_bf607
depends on !BR2_bf608