[PATCH] ARC: build: Try to guess GCC variant of cross compiler

[Vineet Gupta]

On 12/3/24 04:37, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro at nvidia.com>
>
> ARC GCC compiler is packaged starting from Fedora 39i and the GCC
> variant of cross compile tools has arc-linux-gnu- prefix and not
> arc-linux-. This is causing that CROSS_COMPILE variable is left unset.
>
> This change allows builds without need to supply CROSS_COMPILE argument
> if distro package is used.
>
> Before this change:
> $ make -j 128 ARCH=arc W=1 drivers/infiniband/hw/mlx4/
>   gcc: warning: ‘-mcpu=’ is deprecated; use ‘-mtune=’ or ‘-march=’ instead
>   gcc: error: unrecognized command-line option ‘-mmedium-calls’
>   gcc: error: unrecognized command-line option ‘-mlock’
>   gcc: error: unrecognized command-line option ‘-munaligned-access’
>
> [1] https://packages.fedoraproject.org/pkgs/cross-gcc/gcc-arc-linux-gnu/index.html
> Signed-off-by: Leon Romanovsky <leonro at nvidia.com>

Added to for-curr.

Thx,
-Vineet

> ---
>  arch/arc/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arc/Makefile b/arch/arc/Makefile
> index 2390dd042e36..fb98478ed1ab 100644
> --- a/arch/arc/Makefile
> +++ b/arch/arc/Makefile
> @@ -6,7 +6,7 @@
>  KBUILD_DEFCONFIG := haps_hs_smp_defconfig
>  
>  ifeq ($(CROSS_COMPILE),)
> -CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-)
> +CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux- arc-linux-gnu-)
>  endif
>  
>  cflags-y	+= -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__