xiaoxiang781216 commented on a change in pull request #5076:
URL: https://github.com/apache/incubator-nuttx/pull/5076#discussion_r775358856
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File path: arch/risc-v/src/common/Toolchain.defs
##########
@@ -53,15 +53,66 @@ else
MAXOPTIMIZATION ?= -Os
endif
-# Generic GNU RVG toolchain
ifeq ($(CONFIG_RISCV_TOOLCHAIN),GNU_RVG)
+
+ # Generic GNU RVG toolchain
+
CROSSDEV ?= riscv64-unknown-elf-
+
+ # Detect cpu ISA support flags
+
+ ifeq ($(CONFIG_ARCH_RV_ISA_M),y)
+ ARCHRVISAM = m
+ endif
+
+ ifeq ($(CONFIG_ARCH_RV_ISA_A),y)
+ ARCHRVISAA = a
+ endif
+
+ ifeq ($(CONFIG_ARCH_RV_ISA_C),y)
+ ARCHRVISAC = c
+ endif
+
ifeq ($(CONFIG_ARCH_FPU),y)
- ARCHCPUFLAGS = -march=rv32imfc -mabi=ilp32f
+
+ ifeq ($(CONFIG_ARCH_RV_ISA_F),y)
+ ARCHRVISAF = f
+ endif
+
+ ifeq ($(CONFIG_ARCH_DPFPU),y)
+
+ ifeq ($(CONFIG_ARCH_RV_ISA_D),y)
+ ARCHRVISAD = d
+ endif
+
+ endif
+ endif
+
+ # Detect abi type
+
+ ifeq ($(CONFIG_ARCH_RV32),y)
+ ARCHTYPE = rv32
+ ARCHABITYPE = ilp32
+ else ifeq ($(CONFIG_ARCH_RV64),y)
+ ARCHTYPE = rv64
+ ARCHABITYPE = lp64
+ endif
+
+ # Construct arch flags
+
+ ARCHCPUFLAGS =
-march=$(ARCHTYPE)i$(ARCHRVISAM)$(ARCHRVISAA)$(ARCHRVISAF)$(ARCHRVISAD)$(ARCHRVISAC)
+
+ # Construct arch abi flags
+
+ ifeq ($(CONFIG_ARCH_DPFPU),y)
Review comment:
why not define ARCHRVISAD correctly at line 83
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