[Buildroot] [PATCH v2 01/15] toolchain/helpers: add check for mandatory uClibc options

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

Gustavo, All,

On 2015-03-17 13:48 -0300, Gustavo Zacarias spake thusly:
> We currently only check that the Buildroot configuration matches what is
> available in the toolchain.
> 
> Since we're going to remove the check for LFS and make it a mandatory
> feature, we will lose the corresponding buildroot option, so we won't be
> able to use check_uclibc_feature as-is.
> 
> Introduce a magic value passed as the buildroot option name to recognise
> checks for mandatory uclibc options that do not have a corresponding
> option in buildroot.
> 
> If the buildroot option name is empty then the check is against a
> mandatory uclibc option.
> 
> If a mandatory uclibc option is missing we reject the toolchain as being
> unusable by buildroot.
> 
> Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>

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

Regards,
Yann E. MORIN.

> ---
>  toolchain/helpers.mk | 22 +++++++++++++++-------
>  1 file changed, 15 insertions(+), 7 deletions(-)
> 
> diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk
> index 3121da4..5d6390e 100644
> --- a/toolchain/helpers.mk
> +++ b/toolchain/helpers.mk
> @@ -238,6 +238,7 @@ check_musl = \
>  # Check the conformity of Buildroot configuration with regard to the
>  # uClibc configuration of the external toolchain, for a particular
>  # feature.
> +# If 'Buildroot option name' ($2) is empty it means a mandatory option.
>  #
>  # $1: uClibc macro name
>  # $2: Buildroot option name
> @@ -246,13 +247,20 @@ check_musl = \
>  #
>  check_uclibc_feature = \
>  	IS_IN_LIBC=`grep -q "\#define $(1) 1" $(3) && echo y` ; \
> -	if [ "$($(2))" != "y" -a "$${IS_IN_LIBC}" = "y" ] ; then \
> -		echo "$(4) available in C library, please enable $(2)" ; \
> -		exit 1 ; \
> -	fi ; \
> -	if [ "$($(2))" = "y" -a "$${IS_IN_LIBC}" != "y" ] ; then \
> -		echo "$(4) not available in C library, please disable $(2)" ; \
> -		exit 1 ; \
> +	if [ -z "$(2)" ] ; then \
> +		if [ "$${IS_IN_LIBC}" != "y" ] ; then \
> +			echo "$(4) not available in C library, toolchain unsuitable for Buildroot" ; \
> +			exit 1 ; \
> +		fi ; \
> +	else \
> +		if [ "$($(2))" != "y" -a "$${IS_IN_LIBC}" = "y" ] ; then \
> +			echo "$(4) available in C library, please enable $(2)" ; \
> +			exit 1 ; \
> +		fi ; \
> +		if [ "$($(2))" = "y" -a "$${IS_IN_LIBC}" != "y" ] ; then \
> +			echo "$(4) not available in C library, please disable $(2)" ; \
> +			exit 1 ; \
> + 		fi ; \
>  	fi
>  
>  #
> -- 
> 2.0.5
> 
> _______________________________________________
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> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

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