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@@ -150,6 +150,9 @@ endif
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# Check whether the linker supports creating PIEs
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OPENSBI_LD_PIE := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) $(USE_LD_FLAG) -fPIE -nostdlib -Wl,-pie -x c /dev/null -o /dev/null >/dev/null 2>&1 && echo y || echo n)
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+# Check whether the compiler supports -m(no-)save-restore
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+CC_SUPPORT_SAVE_RESTORE := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib -mno-save-restore -x c /dev/null -o /dev/null 2>&1 | grep "\-save\-restore" >/dev/null && echo n || echo y)
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+
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# Build Info:
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# OPENSBI_BUILD_TIME_STAMP -- the compilation time stamp
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# OPENSBI_BUILD_COMPILER_VERSION -- the compiler version info
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@@ -276,8 +279,8 @@ GENFLAGS += $(firmware-genflags-y)
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CFLAGS = -g -Wall -Werror -ffreestanding -nostdlib -fno-stack-protector -fno-strict-aliasing -O2
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CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls -mstrict-align
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-# CLANG-10 (or lower) does not support -m(no-)save-restore option
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-ifneq ($(CC_IS_CLANG),y)
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+# enable -m(no-)save-restore option by CC_SUPPORT_SAVE_RESTORE
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+ifeq ($(CC_SUPPORT_SAVE_RESTORE),y)
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CFLAGS += -mno-save-restore
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endif
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CFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA)
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@@ -294,8 +297,8 @@ CPPFLAGS += $(firmware-cppflags-y)
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ASFLAGS = -g -Wall -nostdlib
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ASFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls -mstrict-align
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-# CLANG-10 (or lower) does not support -m(no-)save-restore option
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-ifneq ($(CC_IS_CLANG),y)
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+# enable -m(no-)save-restore option by CC_SUPPORT_SAVE_RESTORE
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+ifeq ($(CC_SUPPORT_SAVE_RESTORE),y)
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ASFLAGS += -mno-save-restore
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endif
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ASFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA)
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