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| author | Kalle Wachsmuth <kalle.wachsmuth@gmail.com> | 2024-01-18 19:02:31 +0100 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2024-02-05 16:00:54 +0530 |
| commit | 4a76f79ff5e01bb72eedcf636a11f4c701d1568d (patch) | |
| tree | 44309304db407e81eca3b01570235f559a0b7e13 /Makefile | |
| parent | 21caaa3f56c5b8297cda228a93e76bb66a1313c9 (diff) | |
| download | opensbi-4a76f79ff5e01bb72eedcf636a11f4c701d1568d.zip opensbi-4a76f79ff5e01bb72eedcf636a11f4c701d1568d.tar.gz opensbi-4a76f79ff5e01bb72eedcf636a11f4c701d1568d.tar.bz2 | |
Makefile: don't pass -mstrict-align if not supported
Support for that option will be added in LLVM 18:
https://github.com/llvm/llvm-project/commit/23ce5368409c760f3dd49d0f17f34772b0b869d8
Clang 17.0.6, however, will error when passed the
`-mstrict-align` flag.
We should only use the flag if it is supported.
Signed-off-by: Kalle Wachsmuth <kalle.wachsmuth@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Xiang W <wxjstz@126.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 17 |
1 files changed, 13 insertions, 4 deletions
@@ -170,6 +170,9 @@ OPENSBI_LD_PIE := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) $(USE_LD_FLAG) -fP # Check whether the compiler supports -m(no-)save-restore CC_SUPPORT_SAVE_RESTORE := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib -mno-save-restore -x c /dev/null -o /dev/null 2>&1 | grep -e "-save-restore" >/dev/null && echo n || echo y) +# Check whether the compiler supports -m(no-)strict-align +CC_SUPPORT_STRICT_ALIGN := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib -mstrict-align -x c /dev/null -o /dev/null 2>&1 | grep -e "-mstrict-align\|-mno-unaligned-access" >/dev/null && echo n || echo y) + # Check whether the assembler and the compiler support the Zicsr and Zifencei extensions CC_SUPPORT_ZICSR_ZIFENCEI := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib -march=rv$(OPENSBI_CC_XLEN)imafd_zicsr_zifencei -x c /dev/null -o /dev/null 2>&1 | grep "zicsr\|zifencei" > /dev/null && echo n || echo y) @@ -337,11 +340,14 @@ CFLAGS += -O0 else CFLAGS += -O2 endif -CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls -mstrict-align -# enable -m(no-)save-restore option by CC_SUPPORT_SAVE_RESTORE +CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls +# Optionally supported flags ifeq ($(CC_SUPPORT_SAVE_RESTORE),y) CFLAGS += -mno-save-restore endif +ifeq ($(CC_SUPPORT_STRICT_ALIGN),y) +CFLAGS += -mstrict-align +endif CFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA) CFLAGS += -mcmodel=$(PLATFORM_RISCV_CODE_MODEL) CFLAGS += $(RELAX_FLAG) @@ -355,11 +361,14 @@ CPPFLAGS += $(platform-cppflags-y) CPPFLAGS += $(firmware-cppflags-y) ASFLAGS = -g -Wall -nostdlib -ASFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls -mstrict-align -# enable -m(no-)save-restore option by CC_SUPPORT_SAVE_RESTORE +ASFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls +# Optionally supported flags ifeq ($(CC_SUPPORT_SAVE_RESTORE),y) ASFLAGS += -mno-save-restore endif +ifeq ($(CC_SUPPORT_STRICT_ALIGN),y) +ASFLAGS += -mstrict-align +endif ASFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA) ASFLAGS += -mcmodel=$(PLATFORM_RISCV_CODE_MODEL) ASFLAGS += $(RELAX_FLAG) |