linux-kernel - [RFC PATCH v8 01/21] riscv: Separate patch for cflags and aflags

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Message-Id: <3814a5e48384a893ee61613ad9718dabc95ab334.1631121222.git.greentime.hu@sifive.com>
Date:   Thu,  9 Sep 2021 01:45:13 +0800
From:   Greentime Hu <greentime.hu@...ive.com>
To:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        aou@...s.berkeley.edu, palmer@...belt.com,
        paul.walmsley@...ive.com, vincent.chen@...ive.com
Subject: [RFC PATCH v8 01/21] riscv: Separate patch for cflags and aflags

From: Guo Ren <ren_guo@...ky.com>

Use "subst fd" in Makefile is a hack way and it's not convenient
to add new ISA feature. Just separate them into riscv-march-cflags
and riscv-march-aflags.

Signed-off-by: Guo Ren <ren_guo@...ky.com>
Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
---
 arch/riscv/Makefile | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index bc74afdbf31e..428bd3bc202f 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -48,12 +48,18 @@ endif
 endif
 
 # ISA string setting
-riscv-march-$(CONFIG_ARCH_RV32I)	:= rv32ima
-riscv-march-$(CONFIG_ARCH_RV64I)	:= rv64ima
-riscv-march-$(CONFIG_FPU)		:= $(riscv-march-y)fd
-riscv-march-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-y)c
-KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
-KBUILD_AFLAGS += -march=$(riscv-march-y)
+riscv-march-cflags-$(CONFIG_ARCH_RV32I)		:= rv32ima
+riscv-march-cflags-$(CONFIG_ARCH_RV64I)		:= rv64ima
+riscv-march-$(CONFIG_FPU)			:= $(riscv-march-y)fd
+riscv-march-cflags-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-cflags-y)c
+
+riscv-march-aflags-$(CONFIG_ARCH_RV32I)		:= rv32ima
+riscv-march-aflags-$(CONFIG_ARCH_RV64I)		:= rv64ima
+riscv-march-aflags-$(CONFIG_FPU)		:= $(riscv-march-aflags-y)fd
+riscv-march-aflags-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-aflags-y)c
+
+KBUILD_CFLAGS += -march=$(riscv-march-cflags-y)
+KBUILD_AFLAGS += -march=$(riscv-march-aflags-y)
 
 KBUILD_CFLAGS += -mno-save-restore
 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
-- 
2.31.1