[U-Boot] [RFC PATCH] kbuild: use "cc-cross-prefix" to choose CROSS_COMPILE

[Tom Rini <trini@ti.com>]

On Wed, Mar 05, 2014 at 06:24:24PM +0900, Masahiro Yamada wrote:

> CROSS_COMPILE is generally passed from the command line
> or by the environment variable because cross tools
> vary from user to user.
> 
> But, having some choices of often used CROSS_COMPILE
> seems reasonable.
> 
> $(call cc-cross-prefix, ...) returns the first prefix
> where a prefix$(CC) is found in PATH.
> 
> If your cross tools exist in the argument of
> $(call cc-cross-prefix, ...), you do not have to
> specify it explicitly.
> 
> Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
> ---
> 
> My question is which cross tools are popular enough
> to be added to the list.
> 
> In my opition, arm-linux-gnueabi-gcc is popular
> because it is distributed in Ubuntu.
> 
> On the other hand, I am not sure ppc_8xx-gcc is currently
> being used.
> 
> Which one should be to added/deleted to our default list.
> Your comments are very welcome.
> (I am not familiar with compilers very much.)
> 
> 
>  arch/arm/config.mk        | 2 +-
>  arch/microblaze/config.mk | 2 +-
>  arch/powerpc/config.mk    | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)

Looking at the kernel, mips is a better example of where this becomes a
handy thing, over just a "stop passing CROSS_COMPILE".  But that
includes adding tool-archpref.

-- 
Tom
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