[Buildroot] [PATCHv2] toolchain: fix build with empty BR2_TOOLCHAIN_EXTERNAL_CUSTOM_ARGS

[Baruch Siach <baruch@tkos.co.il>]

Hi Buildroot list,

On Mon, Sep 26, 2011 at 10:48:57AM +0300, Baruch Siach wrote:
> The "" string is not equal to the empty string. This fixes build
> errors like:
> 
> arm-none-linux-gnueabi-gcc: : No such file or directory
> 
> Signed-off-by: Baruch Siach <baruch@tkos.co.il>

Ping?
This fixes a real build breakage of the combination of external toolchain and 
empty BR2_TOOLCHAIN_EXTERNAL_CUSTOM_ARGS.

baruch

> ---
> Changes v1 -> v2:
> 	* Use qstrip as suggested by Thomas Petazzoni
> 	* Add build failure example to commit log for future reference
> 
>  toolchain/toolchain-external/ext-tool.mk |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/toolchain/toolchain-external/ext-tool.mk b/toolchain/toolchain-external/ext-tool.mk
> index a357cb9..bf59983 100644
> --- a/toolchain/toolchain-external/ext-tool.mk
> +++ b/toolchain/toolchain-external/ext-tool.mk
> @@ -131,7 +131,8 @@ CC_TARGET_ABI_:=$(call qstrip,$(BR2_GCC_TARGET_ABI))
>  
>  # march/mtune/floating point mode needs to be passed to the external toolchain
>  # to select the right multilib variant
> -ifneq ($(BR2_TOOLCHAIN_EXTERNAL_CUSTOM_ARGS),)
> +TOOLCHAIN_EXTERNAL_CUSTOM_ARGS = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_CUSTOM_ARGS))
> +ifneq ($(TOOLCHAIN_EXTERNAL_CUSTOM_ARGS),)
>  TOOLCHAIN_EXTERNAL_CFLAGS += $(BR2_TOOLCHAIN_EXTERNAL_CUSTOM_ARGS)
>  TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_OPT='$(BR2_TOOLCHAIN_EXTERNAL_CUSTOM_ARGS)'
>  endif
> -- 
> 1.7.6.3
> 

-- 
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