[Buildroot] [PATCH 4/4] arch: remove BR2_GCC_TARGET_ARCH definitions on ARM
Yann E. MORIN
yann.morin.1998 at free.fr
Mon Sep 15 22:09:28 UTC 2014
Thomas, All,
On 2014-09-15 23:01 +0200, Thomas Petazzoni spake thusly:
> On ARM, we were defining both the CPU type and the architecture
> variant. However, depending on the version of gcc, a given combination
> of (CPU, architecture) may not be the same. Since the architecture
> variant is implied by the CPU type, given the former is not necessary,
> and we can simply specify the latter.
>
> From the gcc documentation:
>
> This specifies the name of the target ARM processor. GCC uses this
> name to derive the name of the target ARM architecture (as if
> specified by -march) and the ARM processor type for which to tune
> for performance (as if specified by -mtune). Where this option is
> used in conjunction with -march or -mtune, those options take
> precedence over the appropriate part of this option.
>
> Note that we verified that for all BR2_GCC_TARGET_ARCH value that
> existed, a proper BR2_GCC_TARGET_CPU value is defined.
I guess we'll keep this one in limbo until we have a final answer on
switching from -mcpu to -mtune for ARM.
Regards,
Yann E. MORIN.
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> ---
> arch/Config.in.arm | 19 -------------------
> 1 file changed, 19 deletions(-)
>
> diff --git a/arch/Config.in.arm b/arch/Config.in.arm
> index 6e3c4e6..68f6370 100644
> --- a/arch/Config.in.arm
> +++ b/arch/Config.in.arm
> @@ -352,25 +352,6 @@ config BR2_GCC_TARGET_CPU
> default "xscale" if BR2_xscale
> default "iwmmxt" if BR2_iwmmxt
>
> -config BR2_GCC_TARGET_ARCH
> - default "armv4t" if BR2_arm920t
> - default "armv4t" if BR2_arm922t
> - default "armv5te" if BR2_arm926t
> - default "armv6j" if BR2_arm1136jf_s
> - default "armv6zk" if BR2_arm1176jz_s
> - default "armv6zk" if BR2_arm1176jzf_s
> - default "armv7-a" if BR2_cortex_a5
> - default "armv7-a" if BR2_cortex_a7
> - default "armv7-a" if BR2_cortex_a8
> - default "armv7-a" if BR2_cortex_a9
> - default "armv7-a" if BR2_cortex_a12
> - default "armv7-a" if BR2_cortex_a15
> - default "armv4" if BR2_fa526
> - default "armv7-a" if BR2_pj4
> - default "armv4" if BR2_strongarm
> - default "armv5te" if BR2_xscale
> - default "iwmmxt" if BR2_iwmmxt
> -
> config BR2_GCC_TARGET_ABI
> default "aapcs-linux"
>
> --
> 2.0.0
>
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