[PATCH] riscv: kexec: do not add '-mno-relax' flag if compiler doesn't support it

[Palmer Dabbelt]

On Wed, 21 Jul 2021 19:17:15 PDT (-0700), changbin.du at gmail.com wrote:
> The RISC-V special option '-mno-relax' which to disable linker relaxations
> is supported by GCC8+. For GCC7 and lower versions do not support this
> option.

I would not trust GCC 7 on RISC-V, that was a long time ago and there's 
been a lot fixed since then.

>
> Fixes: fba8a8674f ("RISC-V: Add kexec support")
> Signed-off-by: Changbin Du <changbin.du at gmail.com>
> ---
>  arch/riscv/kernel/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
> index d3081e4d9600..3397ddac1a30 100644
> --- a/arch/riscv/kernel/Makefile
> +++ b/arch/riscv/kernel/Makefile
> @@ -11,7 +11,7 @@ endif
>  CFLAGS_syscall_table.o	+= $(call cc-option,-Wno-override-init,)
>
>  ifdef CONFIG_KEXEC
> -AFLAGS_kexec_relocate.o := -mcmodel=medany -mno-relax
> +AFLAGS_kexec_relocate.o := -mcmodel=medany $(call cc-option,-mno-relax)
>  endif
>
>  extra-y += head.o

This is on fixes.

Thanks!