Sorry, v1 does not work with GCC.
gcc x86_64 rejects -mpreferred-stack-boundary=2, so we need to check
-mpreferred-stack-boundary=4 instead
Signed-off-by: Fangrui Song <mask...@google.com>
---
Makefile | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index 7720db9..66b3eab 100644
--- a/Makefile
+++ b/Makefile
@@ -59,7 +59,7 @@ CPPFLAGS = -P -MD -MT $@
COMMONCFLAGS := -I$(OUT) -Isrc -Os -MD -g \
-Wall -Wno-strict-aliasing -Wold-style-definition \
$(call cc-option,-Wtype-limits) \
- -m32 -march=i386 -mregparm=3 -mpreferred-stack-boundary=2 \
+ -m32 -march=i386 -mregparm=3 \
-minline-all-stringops -fomit-frame-pointer \
-freg-struct-return -ffreestanding -fno-delete-null-pointer-checks \
-ffunction-sections -fdata-sections -fno-common -fno-merge-constants
@@ -69,6 +69,11 @@ COMMONCFLAGS += $(call cc-option,-fno-stack-protector)
COMMONCFLAGS += $(call cc-option,-fno-stack-protector-all)
COMMONCFLAGS += $(call cc-option,-fstack-check=no)
COMMONCFLAGS += $(call cc-option,-Wno-address-of-packed-member)
+ifneq ($(call cc-option,-mpreferred-stack-boundary=4),)
+COMMONCFLAGS += -mpreferred-stack-boundary=2
+else
+COMMONCFLAGS += -mstack-alignment=4
+endif
COMMA := ,
CFLAGS32FLAT := $(COMMONCFLAGS) -DMODE16=0 -DMODESEGMENT=0
--
2.25.1
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