[Buildroot] [PATCH 1/4] arm: conditionally support regular ARM instructions

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Mon Feb 2 20:18:47 UTC 2015

Dear Ezequiel Garcia,

On Thu, 22 Jan 2015 15:33:25 -0300, Ezequiel Garcia wrote:
> From: Guido Martínez <guido at vanguardiasur.com.ar>
> Until now, all ARM processors supported the original ARM instructions.
> However, the Cortex-M variants don't support them, and support only
> Thumb/Thumb2 modes.
> So, make a Kconfig option for ARM support and use it.
> Signed-off-by: Guido Martínez <guido at vanguardiasur.com.ar>
> ---
>  arch/Config.in.arm | 23 ++++++++++++++++++++++-
>  1 file changed, 22 insertions(+), 1 deletion(-)

I've applied this patch, after taking into account Romain's comment,
and also after renaming BR2_ARM_INSTRUCTIONS_ARM_CHOICE to
BR2_ARM_INSTRUCTIONS_ARM and removing the hidden option
BR2_ARM_INSTRUCTIONS_ARM outside the choice.

From the commit log:

  - Remove the dependency in the choice between ARM/Thumb/Thumb-2,
    because basically the choice is now always visible.
  - Replace the BR2_ARM_INSTRUCTIONS_ARM_CHOICE choice option directly
    by BR2_ARM_INSTRUCTIONS_ARM, instead of having this blind option
    defined separately. This means the choice is now always visible,
    even when only the ARM instruction set is supported.]


Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering

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