[oe] [PATCH] cortex-m3: adjusted target cflags

[Khem Raj]

On Mon, Feb 7, 2011 at 7:53 AM, Enrico Scholz
<enrico.scholz at sigma-chemnitz.de> wrote:
> Explicit '-mthumb' is required because Cortex-M3 does not support ARM
> instructions and actual flags cause gcc to fail with 'error: target CPU
> does not support ARM mode'.
>
> The '-mcpu=cortex-m3' is shorter than '-march=armv7-m -mtune=cortex-m3'
> and enables workarounds like '-mfix-cortex-m3-ldrd'.

Does -mcpu=cortex-m3 also cause gcc to tune for cortex-m3 ?

>
> Signed-off-by: Enrico Scholz <enrico.scholz at sigma-chemnitz.de>
> ---
>  conf/machine/include/tune-cortexm3.inc |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/conf/machine/include/tune-cortexm3.inc b/conf/machine/include/tune-cortexm3.inc
> index 6da9aee..a66a33c 100644
> --- a/conf/machine/include/tune-cortexm3.inc
> +++ b/conf/machine/include/tune-cortexm3.inc
> @@ -1,4 +1,4 @@
>  # valid options for -march: `armv7', `armv7-m'
> -TARGET_CC_ARCH = "-march=armv7-m -mtune=cortex-m3 -mfpu=vfp -mfloat-abi=softfp"
> +TARGET_CC_ARCH = "-mthumb -mcpu=cortex-m3 -mfpu=vfp -mfloat-abi=softfp"
>  FEED_ARCH = "armv7"
>  BASE_PACKAGE_ARCH = "armv7"
> --
> 1.7.4
>
>
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