[U-Boot] [RFC PATCH 1/4] ARM: enable Thumb build

[Aneesh V]

On Tuesday 07 February 2012 12:15 AM, Tom Rini wrote:
> On Mon, Feb 6, 2012 at 4:37 AM, Aneesh V<aneesh at ti.com>  wrote:
>> Enable Thumb build and ARM-Thumb interworking based on the new
>> config flag CONFIG_SYS_THUMB_BUILD
>>
>> Signed-off-by: Aneesh V<aneesh at ti.com>
> [snip]
>> -# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
>> -PF_CPPFLAGS_ARM := $(call cc-option,-marm,)
>> +# Choose between ARM/Thumb instruction sets
>> +ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
>> +PF_CPPFLAGS_ARM += $(call cc-option, -mthumb -mthumb-interwork, \
>> +               -marm -mno-thumb-interwork)
>> +else
>> +PF_CPPFLAGS_ARM += $(call cc-option, -marm -mno-thumb-interwork)
>> +endif
>
> We need the ':=' syntax to evaluate this once rather than for every
> file we build.  Same with the rest of the changes here.
>

Oops! In my initial patch it was affecting PLATFORM_CPPFLAGS. When I
rebased it I didn't notice that PF_CPPFLAGS_ARM was defined for the
first time here. I will fix it.

Thanks,
Aneesh