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@@ -275,8 +275,11 @@ GENFLAGS += $(platform-genflags-y)
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GENFLAGS += $(firmware-genflags-y)
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CFLAGS = -g -Wall -Werror -ffreestanding -nostdlib -fno-stack-protector -fno-strict-aliasing -O2
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-CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
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-CFLAGS += -mno-save-restore -mstrict-align
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+CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls -mstrict-align
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+# CLANG-10 (or lower) does not support -m(no-)save-restore option
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+ifneq ($(CC_IS_CLANG),y)
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+CFLAGS += -mno-save-restore
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+endif
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CFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA)
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CFLAGS += -mcmodel=$(PLATFORM_RISCV_CODE_MODEL)
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CFLAGS += $(RELAX_FLAG)
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@@ -290,8 +293,11 @@ CPPFLAGS += $(platform-cppflags-y)
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CPPFLAGS += $(firmware-cppflags-y)
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ASFLAGS = -g -Wall -nostdlib
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-ASFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
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-ASFLAGS += -mno-save-restore -mstrict-align
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+ASFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls -mstrict-align
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+# CLANG-10 (or lower) does not support -m(no-)save-restore option
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+ifneq ($(CC_IS_CLANG),y)
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+ASFLAGS += -mno-save-restore
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+endif
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ASFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA)
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ASFLAGS += -mcmodel=$(PLATFORM_RISCV_CODE_MODEL)
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ASFLAGS += $(RELAX_FLAG)
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