[PATCH] riscv: Fix build errors using binutils2.37 toolchains

[Conor Dooley]

On Fri, Aug 25, 2023 at 03:08:52AM +0800, Mingzheng Xing wrote:
> When building the kernel with binutils 2.37 and GCC-11.1.0/GCC-11.2.0,
> the following error occurs:
> 
>   Assembler messages:
>   Error: cannot find default versions of the ISA extension `zicsr'
>   Error: cannot find default versions of the ISA extension `zifencei'
> 
> The above error originated from this commit of binutils[0], which has been
> resolved and backported by GCC-12.1.0[1] and GCC-11.3.0[2].
> 
> So fix this by change the GCC version in
> CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC to GCC-11.3.0.
> 
> Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=f0bae2552db1dd4f1995608fbf6648fcee4e9e0c [0]
> Link: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=ca2bbb88f999f4d3cc40e89bc1aba712505dd598 [1]
> Link: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=d29f5d6ab513c52fd872f532c492e35ae9fd6671 [2]
> Fixes: ca09f772ccca ("riscv: Handle zicsr/zifencei issue between gcc and binutils")
> Reported-by: Conor Dooley <conor.dooley at microchip.com>

Closes: https://lore.kernel.org/all/20230823-captive-abdomen-befd942a4a73@wendy/
Reviewed-by: Conor Dooley <conor.dooley at microchip.com>
Tested-by: Conor Dooley <conor.dooley at microchip.com>

Thanks!
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