linux-kernel - Re: [PATCH v2] riscv: Handle zicsr/zifencei issue between gcc and binutils

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Date:   Wed, 26 Jul 2023 20:41:55 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Mingzheng Xing <xingmingzheng@...as.ac.cn>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, Bin Meng <bmeng@...ylab.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, stable@...r.kernel.org
Subject: Re: [PATCH v2] riscv: Handle zicsr/zifencei issue between gcc and
 binutils

On Thu, Jul 27, 2023 at 03:34:16AM +0800, Mingzheng Xing wrote:
> On 7/27/23 02:02, Conor Dooley wrote:

> > This is still broken for:
> > CONFIG_CLANG_VERSION=0
> > CONFIG_AS_IS_GNU=y
> > CONFIG_AS_VERSION=23500
> > CONFIG_LD_IS_BFD=y
> > CONFIG_LD_VERSION=23500
> 
> Do you mean that these CONFIG_* will cause kernel
> compilation errors when paired with certain versions of GCC?
> Or perhaps I misunderstood your meaning.

No, this section is generated by kconfig, although I messed up my
trimming of the list & accidentally removed the gcc version, rather
than the clang version. Here's the full thing:

CONFIG_CC_VERSION_TEXT="riscv64-unknown-linux-gnu-gcc (g2ee5e430018) 12.2.0"
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=120200
CONFIG_CLANG_VERSION=0
CONFIG_AS_IS_GNU=y
CONFIG_AS_VERSION=23500
CONFIG_LD_IS_BFD=y
CONFIG_LD_VERSION=23500
CONFIG_LLD_VERSION=0
CONFIG_CC_CAN_LINK=y
CONFIG_CC_CAN_LINK_STATIC=y
CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
CONFIG_CC_HAS_ASM_INLINE=y
CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
CONFIG_PAHOLE_VERSION=0
CONFIG_CONSTRUCTORS=y
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_TABLE_SORT=y

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