[Buildroot] [PATCH 2/4] toolchain: allow for stupid toolchains

[Yann E. MORIN <yann.morin.1998@free.fr>]

Guido, All,

On 2015-06-26 14:33 -0300, Guido Mart?nez spake thusly:
> check_arm_abi builds a test C file to check that the toolchain is
> working correctly, with the output redirected to /dev/null.
> 
> However, some toolchains (OSELAS 2014.12.0, for instance) foolishly
> append ".gdb" to the output filename for an intermediate file, causing
> an attempt to write to /dev/null.gdb, which obviously fails.
> 
> Fix this by adding changing the output to a temporary file, which is
> later removed along with any other "suffixed" files.
> 
> Suggested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
> Signed-off-by: Guido Mart?nez <guido@vanguardiasur.com.ar>

Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

Regards,
Yann E. MORIN.

> ---
>  toolchain/helpers.mk | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk
> index 30eb065..0dc1864 100644
> --- a/toolchain/helpers.mk
> +++ b/toolchain/helpers.mk
> @@ -308,12 +308,14 @@ check_arm_abi = \
>  		echo "External toolchain uses the unsuported OABI" ; \
>  		exit 1 ; \
>  	fi ; \
> -	if ! echo 'int main(void) {}' | $${__CROSS_CC} -x c -o /dev/null - ; then \
> +	if ! echo 'int main(void) {}' | $${__CROSS_CC} -x c -o $(BUILD_DIR)/.br-toolchain-test.tmp - ; then \
> +		rm -f $(BUILD_DIR)/.br-toolchain-test.tmp*; \
>  		abistr_$(BR2_ARM_EABI)='EABI'; \
>  		abistr_$(BR2_ARM_EABIHF)='EABIhf'; \
>  		echo "Incorrect ABI setting: $${abistr_y} selected, but toolchain is incompatible"; \
>  		exit 1 ; \
> -	fi
> +	fi ; \
> +	rm -f $(BUILD_DIR)/.br-toolchain-test.tmp*
>  
>  #
>  # Check that the external toolchain supports C++
> -- 
> 2.1.4
> 
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