[Buildroot] [PATCH] Makefile: unexport O

[Romain Naour <romain.naour@openwide.fr>]

Hi Guido,

Le 25/07/2015 21:07, Guido Mart?nez a ?crit :
> After bee5745ccc2 ("Makefile: don't depend on the umask"), any use
> of "make O=<dir>" would leak $O into the enviroment for submakes,
> and it's inherited by package makefiles. Some package makefiles have
> protections to make sure they don't use the value of $O if it comes from
> the enviroment (Linux), but some don't (uClibc).
> 
> This caused build failures when using a different output dir.
> 
> Fix this by unconditionally unexporting the O variable, since we never
> need to have it set in the environment for packages, it should be only
> internally used by BR.
> 
> Signed-off-by: Guido Mart?nez <guido@vanguardiasur.com.ar>

Acked-by: Romain Naour <romain.naour@openwide.fr>

Best regards,
Romain Naour

> ---
>  Makefile | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Makefile b/Makefile
> index 8b9c5d9..9059884 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -329,6 +329,7 @@ unexport CONFIG_SITE
>  unexport QMAKESPEC
>  unexport TERMINFO
>  unexport MACHINE
> +unexport O
>  
>  GNU_HOST_NAME := $(shell support/gnuconfig/config.guess)
>  
>