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-rw-r--r--arch/x86_64/Makefile24
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile
index 585fd4a559c8..e573e2ab5510 100644
--- a/arch/x86_64/Makefile
+++ b/arch/x86_64/Makefile
@@ -24,37 +24,37 @@
24LDFLAGS := -m elf_x86_64 24LDFLAGS := -m elf_x86_64
25OBJCOPYFLAGS := -O binary -R .note -R .comment -S 25OBJCOPYFLAGS := -O binary -R .note -R .comment -S
26LDFLAGS_vmlinux := 26LDFLAGS_vmlinux :=
27
28CHECKFLAGS += -D__x86_64__ -m64 27CHECKFLAGS += -D__x86_64__ -m64
29 28
29cflags-y :=
30cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) 30cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
31cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) 31cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
32cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) 32cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
33CFLAGS += $(cflags-y)
34 33
35CFLAGS += -m64 34cflags-y += -m64
36CFLAGS += -mno-red-zone 35cflags-y += -mno-red-zone
37CFLAGS += -mcmodel=kernel 36cflags-y += -mcmodel=kernel
38CFLAGS += -pipe 37cflags-y += -pipe
39cflags-$(CONFIG_REORDER) += -ffunction-sections 38cflags-$(CONFIG_REORDER) += -ffunction-sections
40# this makes reading assembly source easier, but produces worse code 39# this makes reading assembly source easier, but produces worse code
41# actually it makes the kernel smaller too. 40# actually it makes the kernel smaller too.
42CFLAGS += -fno-reorder-blocks 41cflags-y += -fno-reorder-blocks
43CFLAGS += -Wno-sign-compare 42cflags-y += -Wno-sign-compare
44ifneq ($(CONFIG_UNWIND_INFO),y) 43ifneq ($(CONFIG_UNWIND_INFO),y)
45CFLAGS += -fno-asynchronous-unwind-tables 44cflags-y += -fno-asynchronous-unwind-tables
46endif 45endif
47ifneq ($(CONFIG_DEBUG_INFO),y) 46ifneq ($(CONFIG_DEBUG_INFO),y)
48# -fweb shrinks the kernel a bit, but the difference is very small 47# -fweb shrinks the kernel a bit, but the difference is very small
49# it also messes up debugging, so don't use it for now. 48# it also messes up debugging, so don't use it for now.
50#CFLAGS += $(call cc-option,-fweb) 49#cflags-y += $(call cc-option,-fweb)
51endif 50endif
52# -funit-at-a-time shrinks the kernel .text considerably 51# -funit-at-a-time shrinks the kernel .text considerably
53# unfortunately it makes reading oopses harder. 52# unfortunately it makes reading oopses harder.
54CFLAGS += $(call cc-option,-funit-at-a-time) 53cflags-y += $(call cc-option,-funit-at-a-time)
55# prevent gcc from generating any FP code by mistake 54# prevent gcc from generating any FP code by mistake
56CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) 55cflags-y += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
57 56
57CFLAGS += $(cflags-y)
58AFLAGS += -m64 58AFLAGS += -m64
59 59
60head-y := arch/x86_64/kernel/head.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task.o 60head-y := arch/x86_64/kernel/head.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task.o