kbuild: enable 'make CFLAGS=...' to add additional options to CC
The variable CFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.
On top of that several people over time has asked for a way to
pass in additional flags to gcc.
This patch replace use of CFLAGS with KBUILD_CFLAGS all over the
tree and enabling one to use:
make CFLAGS=...
to specify additional gcc commandline options.
One usecase is when trying to find gcc bugs but other
use cases has been requested too.
Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k
Test was simple to do a defconfig build, apply the patch and check
that nothing got rebuild.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/arch/alpha/Makefile b/arch/alpha/Makefile
index 1b704ee..2f283b2 100644
--- a/arch/alpha/Makefile
+++ b/arch/alpha/Makefile
@@ -84,7 +84,7 @@
# For TSUNAMI, we must have the assembler not emulate our instructions.
# The same is true for IRONGATE, POLARIS, PYXIS.
# BWX is most important, but we don't really want any emulation ever.
-CFLAGS += $(cflags-y) -Wa,-mev6
+KBUILD_CFLAGS += $(cflags-y) -Wa,-mev6
head-y := arch/alpha/kernel/head.o
diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile
index ab6fa54..dccf052 100644
--- a/arch/alpha/kernel/Makefile
+++ b/arch/alpha/kernel/Makefile
@@ -3,7 +3,7 @@
#
extra-y := head.o vmlinux.lds
-EXTRA_AFLAGS := $(CFLAGS)
+EXTRA_AFLAGS := $(KBUILD_CFLAGS)
EXTRA_CFLAGS := -Werror -Wno-sign-compare
obj-y := entry.o traps.o process.o init_task.o osf_sys.o irq.o \
diff --git a/arch/alpha/lib/Makefile b/arch/alpha/lib/Makefile
index 266f78e..9b72c59 100644
--- a/arch/alpha/lib/Makefile
+++ b/arch/alpha/lib/Makefile
@@ -2,7 +2,7 @@
# Makefile for alpha-specific library files..
#
-EXTRA_AFLAGS := $(CFLAGS)
+EXTRA_AFLAGS := $(KBUILD_CFLAGS)
EXTRA_CFLAGS := -Werror
# Many of these routines have implementations tuned for ev6.
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index fa4ea9f..0b82865 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -14,9 +14,9 @@
CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
OBJCOPYFLAGS :=-O binary -R .note -R .comment -S
GZFLAGS :=-9
-#CFLAGS +=-pipe
+#KBUILD_CFLAGS +=-pipe
# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
-CFLAGS +=$(call cc-option,-marm,)
+KBUILD_CFLAGS +=$(call cc-option,-marm,)
# Do not use arch/arm/defconfig - it's always outdated.
# Select a platform tht is kept up-to-date
@@ -28,7 +28,7 @@
endif
ifeq ($(CONFIG_FRAME_POINTER),y)
-CFLAGS +=-fno-omit-frame-pointer -mapcs -mno-sched-prolog
+KBUILD_CFLAGS +=-fno-omit-frame-pointer -mapcs -mno-sched-prolog
endif
ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
@@ -85,7 +85,7 @@
endif
# Need -Uarm for gcc < 3.x
-CFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
+KBUILD_CFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
AFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) -msoft-float
CHECKFLAGS += -D__arm__
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 6b8cbd6..5fde99f 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -87,7 +87,7 @@
LDFLAGS_vmlinux += --defsym params_phys=$(PARAMS_PHYS)
endif
LDFLAGS_vmlinux += -p --no-undefined -X \
- $(shell $(CC) $(CFLAGS) --print-libgcc-file-name) -T
+ $(shell $(CC) $(KBUILD_CFLAGS) --print-libgcc-file-name) -T
# Don't allow any static data in misc.o, which
# would otherwise mess up our GOT table
diff --git a/arch/avr32/Makefile b/arch/avr32/Makefile
index dc6bc01..9883c8b 100644
--- a/arch/avr32/Makefile
+++ b/arch/avr32/Makefile
@@ -11,14 +11,14 @@
KBUILD_DEFCONFIG := atstk1002_defconfig
-CFLAGS += -pipe -fno-builtin -mno-pic
+KBUILD_CFLAGS += -pipe -fno-builtin -mno-pic
AFLAGS += -mrelax -mno-pic
CFLAGS_MODULE += -mno-relax
LDFLAGS_vmlinux += --relax
cpuflags-$(CONFIG_CPU_AT32AP7000) += -mcpu=ap7000
-CFLAGS += $(cpuflags-y)
+KBUILD_CFLAGS += $(cpuflags-y)
AFLAGS += $(cpuflags-y)
CHECKFLAGS += -D__avr32__ -D__BIG_ENDIAN
diff --git a/arch/blackfin/Makefile b/arch/blackfin/Makefile
index 2084166..52a6ac0 100644
--- a/arch/blackfin/Makefile
+++ b/arch/blackfin/Makefile
@@ -53,7 +53,7 @@
rev-$(CONFIG_BF_REV_NONE) := none
rev-$(CONFIG_BF_REV_ANY) := any
-CFLAGS += -mcpu=$(cpu-y)-$(rev-y)
+KBUILD_CFLAGS += -mcpu=$(cpu-y)-$(rev-y)
AFLAGS += -mcpu=$(cpu-y)-$(rev-y)
head-y := arch/$(ARCH)/mach-$(MACHINE)/head.o arch/$(ARCH)/kernel/init_task.o
diff --git a/arch/cris/Makefile b/arch/cris/Makefile
index ee11469..32ef6f3 100644
--- a/arch/cris/Makefile
+++ b/arch/cris/Makefile
@@ -31,16 +31,16 @@
CPPFLAGS_vmlinux.lds = -DDRAM_VIRTUAL_BASE=0x$(CONFIG_ETRAX_DRAM_VIRTUAL_BASE)
AFLAGS += -mlinux
-CFLAGS := $(CFLAGS) -mlinux -march=$(arch-y) -pipe
+KBUILD_CFLAGS += -mlinux -march=$(arch-y) -pipe
ifdef CONFIG_FRAME_POINTER
-CFLAGS := $(subst -fomit-frame-pointer,,$(CFLAGS)) -g
-CFLAGS += -fno-omit-frame-pointer
+KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g
+KBUILD_CFLAGS += -fno-omit-frame-pointer
endif
head-y := arch/$(ARCH)/$(SARCH)/kernel/head.o
-LIBGCC = $(shell $(CC) $(CFLAGS) -print-file-name=libgcc.a)
+LIBGCC = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libgcc.a)
core-y += arch/$(ARCH)/kernel/ arch/$(ARCH)/mm/
core-y += arch/$(ARCH)/$(SARCH)/kernel/ arch/$(ARCH)/$(SARCH)/mm/
diff --git a/arch/frv/Makefile b/arch/frv/Makefile
index 9bf7345..ec89886 100644
--- a/arch/frv/Makefile
+++ b/arch/frv/Makefile
@@ -39,13 +39,13 @@
ARCHMODFLAGS += -G0 -mlong-calls
ifdef CONFIG_GPREL_DATA_8
-CFLAGS += -G8
+KBUILD_CFLAGS += -G8
else
ifdef CONFIG_GPREL_DATA_4
-CFLAGS += -G4
+KBUILD_CFLAGS += -G4
else
ifdef CONFIG_GPREL_DATA_NONE
-CFLAGS += -G0
+KBUILD_CFLAGS += -G0
endif
endif
endif
@@ -53,25 +53,25 @@
#LDFLAGS_vmlinux := -Map linkmap.txt
ifdef CONFIG_GC_SECTIONS
-CFLAGS += -ffunction-sections -fdata-sections
+KBUILD_CFLAGS += -ffunction-sections -fdata-sections
LINKFLAGS += --gc-sections
endif
ifndef CONFIG_FRAME_POINTER
-CFLAGS += -mno-linked-fp
+KBUILD_CFLAGS += -mno-linked-fp
endif
ifdef CONFIG_CPU_FR451_COMPILE
-CFLAGS += -mcpu=fr450
+KBUILD_CFLAGS += -mcpu=fr450
AFLAGS += -mcpu=fr450
ASFLAGS += -mcpu=fr450
else
ifdef CONFIG_CPU_FR551_COMPILE
-CFLAGS += -mcpu=fr550
+KBUILD_CFLAGS += -mcpu=fr550
AFLAGS += -mcpu=fr550
ASFLAGS += -mcpu=fr550
else
-CFLAGS += -mcpu=fr400
+KBUILD_CFLAGS += -mcpu=fr400
AFLAGS += -mcpu=fr400
ASFLAGS += -mcpu=fr400
endif
@@ -80,15 +80,15 @@
# pretend the kernel is going to run on an FR400 with no media-fp unit
# - reserve CC3 for use with atomic ops
# - all the extra registers are dealt with only at context switch time
-CFLAGS += -mno-fdpic -mgpr-32 -msoft-float -mno-media
-CFLAGS += -ffixed-fcc3 -ffixed-cc3 -ffixed-gr15 -ffixed-icc2
+KBUILD_CFLAGS += -mno-fdpic -mgpr-32 -msoft-float -mno-media
+KBUILD_CFLAGS += -ffixed-fcc3 -ffixed-cc3 -ffixed-gr15 -ffixed-icc2
AFLAGS += -mno-fdpic
ASFLAGS += -mno-fdpic
# make sure the .S files get compiled with debug info
# and disable optimisations that are unhelpful whilst debugging
ifdef CONFIG_DEBUG_INFO
-#CFLAGS += -O1
+#KBUILD_CFLAGS += -O1
AFLAGS += -Wa,--gdwarf2
ASFLAGS += -Wa,--gdwarf2
endif
diff --git a/arch/h8300/Makefile b/arch/h8300/Makefile
index 53b5c1e..330e05f 100644
--- a/arch/h8300/Makefile
+++ b/arch/h8300/Makefile
@@ -30,16 +30,16 @@
cflags-$(CONFIG_CPU_H8S) := -ms
ldflags-$(CONFIG_CPU_H8S) := -mh8300self
-CFLAGS += $(cflags-y)
-CFLAGS += -mint32 -fno-builtin
-CFLAGS += -g
-CFLAGS += -D__linux__
-CFLAGS += -DUTS_SYSNAME=\"uClinux\"
+KBUILD_CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += -mint32 -fno-builtin
+KBUILD_CFLAGS += -g
+KBUILD_CFLAGS += -D__linux__
+KBUILD_CFLAGS += -DUTS_SYSNAME=\"uClinux\"
AFLAGS += -DPLATFORM=$(PLATFORM) -DMODEL=$(MODEL) $(cflags-y)
LDFLAGS += $(ldflags-y)
CROSS_COMPILE = h8300-elf-
-LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(CFLAGS) -print-libgcc-file-name)
+LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
head-y := arch/$(ARCH)/platform/$(PLATFORM)/$(BOARD)/crt0_$(MODEL).o
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index 5e50dbf..fc3c8e8 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -34,10 +34,10 @@
endif
CHECKFLAGS += -D__i386__
-CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
+KBUILD_CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
# prevent gcc from keeping the stack 16 byte aligned
-CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
+KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
# CPU-specific tuning. Anything which can be shared with UML should go here.
include $(srctree)/arch/i386/Makefile.cpu
@@ -51,7 +51,7 @@
# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
# a lot more stack due to the lack of sharing of stacklots:
-CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;)
+KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;)
# do binutils support CFI?
cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
@@ -61,7 +61,7 @@
cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
-CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += $(cflags-y)
# Default subarch .c files
mcore-y := arch/x86/mach-default
@@ -116,7 +116,7 @@
drivers-$(CONFIG_PM) += arch/x86/power/
drivers-$(CONFIG_FB) += arch/x86/video/
-CFLAGS += $(mflags-y)
+KBUILD_CFLAGS += $(mflags-y)
AFLAGS += $(mflags-y)
boot := arch/x86/boot
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index 21033ed..9708a29 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile
@@ -44,7 +44,7 @@
cflags-$(CONFIG_MCKINLEY) += -mtune=mckinley
endif
-CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += $(cflags-y)
head-y := arch/ia64/kernel/head.o arch/ia64/kernel/init_task.o
libs-y += arch/ia64/lib/
diff --git a/arch/m32r/Makefile b/arch/m32r/Makefile
index 60e12f3..c80618a 100644
--- a/arch/m32r/Makefile
+++ b/arch/m32r/Makefile
@@ -9,7 +9,7 @@
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
LDFLAGS_vmlinux :=
-CFLAGS += -pipe -fno-schedule-insns
+KBUILD_CFLAGS += -pipe -fno-schedule-insns
CFLAGS_KERNEL += -mmodel=medium
CFLAGS_MODULE += -mmodel=large
@@ -24,14 +24,14 @@
cflags-$(CONFIG_ISA_M32R) += -DNO_FPU
aflags-$(CONFIG_ISA_M32R) += -DNO_FPU -O2 -Wa,-no-bitinst
-CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += $(cflags-y)
AFLAGS += $(aflags-y)
CHECKFLAGS += -D__m32r__ -D__BIG_ENDIAN__=1
head-y := arch/m32r/kernel/head.o arch/m32r/kernel/init_task.o
-LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
libs-y += arch/m32r/lib/ $(LIBGCC)
core-y += arch/m32r/kernel/ \
diff --git a/arch/m68k/Makefile b/arch/m68k/Makefile
index aa383a5..4a1bd44 100644
--- a/arch/m68k/Makefile
+++ b/arch/m68k/Makefile
@@ -32,18 +32,18 @@
CHECKFLAGS += -D__mc68000__
# without -fno-strength-reduce the 53c7xx.c driver fails ;-(
-CFLAGS += -pipe -fno-strength-reduce -ffixed-a2
+KBUILD_CFLAGS += -pipe -fno-strength-reduce -ffixed-a2
# enable processor switch if compiled only for a single cpu
ifndef CONFIG_M68020
ifndef CONFIG_M68030
ifndef CONFIG_M68060
-CFLAGS := $(CFLAGS) -m68040
+KBUILD_CFLAGS += -m68040
endif
ifndef CONFIG_M68040
-CFLAGS := $(CFLAGS) -m68060
+KBUILD_CFLAGS += -m68060
endif
endif
@@ -52,7 +52,7 @@
ifdef CONFIG_KGDB
# If configured for kgdb support, include debugging infos and keep the
# frame pointer
-CFLAGS := $(subst -fomit-frame-pointer,,$(CFLAGS)) -g
+KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g
endif
ifndef CONFIG_SUN3
diff --git a/arch/m68knommu/Makefile b/arch/m68knommu/Makefile
index 1305cc9..1c1fbb6 100644
--- a/arch/m68knommu/Makefile
+++ b/arch/m68knommu/Makefile
@@ -104,9 +104,9 @@
AFLAGS += $(cflags-y)
-CFLAGS += $(cflags-y)
-CFLAGS += -D__linux__
-CFLAGS += -DUTS_SYSNAME=\"uClinux\"
+KBUILD_CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += -D__linux__
+KBUILD_CFLAGS += -DUTS_SYSNAME=\"uClinux\"
head-y := arch/m68knommu/platform/$(cpuclass-y)/head.o
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index ebd5d02..64512ab 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -609,13 +609,13 @@
endif
AFLAGS += $(cflags-y)
-CFLAGS += $(cflags-y) \
+KBUILD_CFLAGS += $(cflags-y) \
-D"VMLINUX_LOAD_ADDRESS=$(load-y)"
LDFLAGS += -m $(ld-emul)
ifdef CONFIG_MIPS
-CHECKFLAGS += $(shell $(CC) $(CFLAGS) -dM -E -xc /dev/null | \
+CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -xc /dev/null | \
egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
sed -e 's/^\#define /-D/' -e "s/ /='/" -e "s/$$/'/")
ifdef CONFIG_64BIT
@@ -632,7 +632,7 @@
#
CPPFLAGS_vmlinux.lds := \
- $(CFLAGS) \
+ $(KBUILD_CFLAGS) \
-D"LOADADDR=$(load-y)" \
-D"JIFFIES=$(JIFFIES)" \
-D"DATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)"
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index a2689f9..95a356e 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -71,7 +71,7 @@
obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
-CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
+CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT) += 8250-platform.o
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 760567a..f3d0d7c7 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -63,7 +63,7 @@
head-y := arch/parisc/kernel/head.o
-CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += $(cflags-y)
kernel-y := mm/ kernel/ math-emu/ kernel/init_task.o
kernel-$(CONFIG_HPUX) += hpux/
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 643839a..5130984 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -77,8 +77,8 @@
CFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
CPPFLAGS += $(CPPFLAGS-y)
AFLAGS += $(AFLAGS-y)
-CFLAGS += -msoft-float -pipe $(CFLAGS-y)
-CPP = $(CC) -E $(CFLAGS)
+KBUILD_CFLAGS += -msoft-float -pipe $(CFLAGS-y)
+CPP = $(CC) -E $(KBUILD_CFLAGS)
CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
@@ -88,35 +88,35 @@
ifeq ($(CONFIG_POWER4_ONLY),y)
ifeq ($(CONFIG_ALTIVEC),y)
ifeq ($(GCC_BROKEN_VEC),y)
- CFLAGS += $(call cc-option,-mcpu=970)
+ KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
else
- CFLAGS += $(call cc-option,-mcpu=power4)
+ KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
endif
else
- CFLAGS += $(call cc-option,-mcpu=power4)
+ KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
endif
else
- CFLAGS += $(call cc-option,-mtune=power4)
+ KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
endif
endif
ifeq ($(CONFIG_TUNE_CELL),y)
- CFLAGS += $(call cc-option,-mtune=cell)
+ KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
endif
# No AltiVec instruction when building kernel
-CFLAGS += $(call cc-option,-mno-altivec)
+KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
# Enable unit-at-a-time mode when possible. It shrinks the
# kernel considerably.
-CFLAGS += $(call cc-option,-funit-at-a-time)
+KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
# Never use string load/store instructions as they are
# often slow when they are implemented at all
-CFLAGS += -mno-string
+KBUILD_CFLAGS += -mno-string
ifeq ($(CONFIG_6xx),y)
-CFLAGS += -mcpu=powerpc
+KBUILD_CFLAGS += -mcpu=powerpc
endif
cpu-as-$(CONFIG_4xx) += -Wa,-m405
@@ -126,7 +126,7 @@
cpu-as-$(CONFIG_E200) += -Wa,-me200
AFLAGS += $(cpu-as-y)
-CFLAGS += $(cpu-as-y)
+KBUILD_CFLAGS += $(cpu-as-y)
head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
diff --git a/arch/ppc/Makefile b/arch/ppc/Makefile
index eee6264..43802e9 100644
--- a/arch/ppc/Makefile
+++ b/arch/ppc/Makefile
@@ -24,20 +24,20 @@
# The -Iarch/$(ARCH)/include is temporary while we are merging
CPPFLAGS += -Iarch/$(ARCH) -Iarch/$(ARCH)/include
AFLAGS += -Iarch/$(ARCH)
-CFLAGS += -Iarch/$(ARCH) -msoft-float -pipe \
+KBUILD_CFLAGS += -Iarch/$(ARCH) -msoft-float -pipe \
-ffixed-r2 -mmultiple
# No AltiVec instruction when building kernel
-CFLAGS += $(call cc-option, -mno-altivec)
+KBUILD_CFLAGS += $(call cc-option, -mno-altivec)
-CPP = $(CC) -E $(CFLAGS)
+CPP = $(CC) -E $(KBUILD_CFLAGS)
# Temporary hack until we have migrated to asm-powerpc
LINUXINCLUDE += -Iarch/$(ARCH)/include
CHECKFLAGS += -D__powerpc__
ifndef CONFIG_FSL_BOOKE
-CFLAGS += -mstring
+KBUILD_CFLAGS += -mstring
endif
cpu-as-$(CONFIG_4xx) += -Wa,-m405
@@ -46,7 +46,7 @@
cpu-as-$(CONFIG_E200) += -Wa,-me200
AFLAGS += $(cpu-as-y)
-CFLAGS += $(cpu-as-y)
+KBUILD_CFLAGS += $(cpu-as-y)
# Default to the common case.
KBUILD_DEFCONFIG := common_defconfig
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 143ed8e..62a0da4 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -15,7 +15,7 @@
ifndef CONFIG_64BIT
LDFLAGS := -m elf_s390
-CFLAGS += -m31
+KBUILD_CFLAGS += -m31
AFLAGS += -m31
UTS_MACHINE := s390
STACK_SIZE := 8192
@@ -23,7 +23,7 @@
else
LDFLAGS := -m elf64_s390
MODFLAGS += -fpic -D__PIC__
-CFLAGS += -m64
+KBUILD_CFLAGS += -m64
AFLAGS += -m64
UTS_MACHINE := s390x
STACK_SIZE := 16384
@@ -77,8 +77,8 @@
cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE)
endif
-CFLAGS += -mbackchain -msoft-float $(cflags-y)
-CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
+KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
+KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
AFLAGS += $(aflags-y)
OBJCOPYFLAGS := -O binary
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 97ac586..cd8a411 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -91,12 +91,12 @@
LDFLAGS += -EB
endif
-CFLAGS += -pipe $(cflags-y)
+KBUILD_CFLAGS += -pipe $(cflags-y)
AFLAGS += $(cflags-y)
head-y := arch/sh/kernel/head.o arch/sh/kernel/init_task.o
-LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
core-y += arch/sh/kernel/ arch/sh/mm/
core-$(CONFIG_SH_FPU_EMU) += arch/sh/math-emu/
diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile
index 013504a..906a13f 100644
--- a/arch/sh/boot/compressed/Makefile
+++ b/arch/sh/boot/compressed/Makefile
@@ -21,7 +21,7 @@
$(CONFIG_MEMORY_START) + \
$(CONFIG_BOOT_LINK_OFFSET)]')
-LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup -T $(obj)/../../kernel/vmlinux.lds
diff --git a/arch/sh64/Makefile b/arch/sh64/Makefile
index ebf2004..9e874de 100644
--- a/arch/sh64/Makefile
+++ b/arch/sh64/Makefile
@@ -26,7 +26,7 @@
endif
# No requirements for endianess support from AFLAGS, 'as' always run through gcc
-CFLAGS += $(cpu-y)
+KBUILD_CFLAGS += $(cpu-y)
LDFLAGS_vmlinux += --defsym phys_stext=_stext-$(CONFIG_CACHED_MEMORY_OFFSET) \
--defsym phys_stext_shmedia=phys_stext+1 \
@@ -57,7 +57,7 @@
core-y += arch/sh64/mach-$(machine-y)/
endif
-LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
libs-y += arch/$(ARCH)/lib/ $(LIBGCC)
drivers-$(CONFIG_OPROFILE) += arch/sh64/oprofile/
diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
index f33c381..2ce781a 100644
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -8,15 +8,15 @@
#
#
-# Uncomment the first CFLAGS if you are doing kgdb source level
+# Uncomment the first KBUILD_CFLAGS if you are doing kgdb source level
# debugging of the kernel to get the proper debugging information.
AS := $(AS) -32
LDFLAGS := -m elf32_sparc
CHECKFLAGS += -D__sparc__
-#CFLAGS := $(CFLAGS) -g -pipe -fcall-used-g5 -fcall-used-g7
-CFLAGS := $(CFLAGS) -m32 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7
+#KBUILD_CFLAGS += -g -pipe -fcall-used-g5 -fcall-used-g7
+KBUILD_CFLAGS += -m32 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7
AFLAGS := $(AFLAGS) -m32
#LDFLAGS_vmlinux = -N -Ttext 0xf0004000
diff --git a/arch/sparc64/Makefile b/arch/sparc64/Makefile
index cad10c5..b083dc4 100644
--- a/arch/sparc64/Makefile
+++ b/arch/sparc64/Makefile
@@ -39,17 +39,17 @@
endif
ifneq ($(NEW_GCC),y)
- CFLAGS := $(CFLAGS) -pipe -mno-fpu -mtune=ultrasparc -mmedlow \
+ KBUILD_CFLAGS += -pipe -mno-fpu -mtune=ultrasparc -mmedlow \
-ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare
else
- CFLAGS := $(CFLAGS) -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow \
+ KBUILD_CFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow \
-ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare \
$(CC_UNDECL)
AFLAGS += -m64 -mcpu=ultrasparc $(CC_UNDECL)
endif
ifeq ($(CONFIG_MCOUNT),y)
- CFLAGS := $(CFLAGS) -pg
+ KBUILD_CFLAGS += -pg
endif
head-y := arch/sparc64/kernel/head.o arch/sparc64/kernel/init_task.o
diff --git a/arch/um/Makefile b/arch/um/Makefile
index 989224f..18123bf 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -58,14 +58,14 @@
#
# These apply to USER_CFLAGS to.
-CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
+KBUILD_CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
-Din6addr_loopback=kernel_in6addr_loopback
AFLAGS += $(ARCH_INCLUDE)
USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
- $(patsubst -I%,,$(CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
+ $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
-D_FILE_OFFSET_BITS=64
include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
@@ -75,14 +75,14 @@
# -Derrno=kernel_errno - This turns all kernel references to errno into
# kernel_errno to separate them from the libc errno. This allows -fno-common
-# in CFLAGS. Otherwise, it would cause ld to complain about the two different
+# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
# errnos.
# These apply to kernelspace only.
KERNEL_DEFINES = -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
-Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)
-CFLAGS += $(KERNEL_DEFINES)
-CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
+KBUILD_CFLAGS += $(KERNEL_DEFINES)
+KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
# These are needed for clean and mrproper, since in that case .config is not
# included; the values here are meaningless
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index c9f1c5b..26bc786 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -15,7 +15,7 @@
ifeq ("$(origin SUBARCH)", "command line")
ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)")
-CFLAGS += $(call cc-option,-m32)
+KBUILD_CFLAGS += $(call cc-option,-m32)
AFLAGS += $(call cc-option,-m32)
LINK-y += $(call cc-option,-m32)
UML_OBJCOPYFLAGS += -F $(ELF_FORMAT)
@@ -36,4 +36,4 @@
# an unresolved reference.
cflags-y += -ffreestanding
-CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += $(cflags-y)
diff --git a/arch/um/Makefile-os-Linux b/arch/um/Makefile-os-Linux
index 0c0f9a1..5285948 100644
--- a/arch/um/Makefile-os-Linux
+++ b/arch/um/Makefile-os-Linux
@@ -5,4 +5,4 @@
# To get a definition of F_SETSIG
USER_CFLAGS += -D_GNU_SOURCE -D_LARGEFILE64_SOURCE
-CFLAGS += -D_LARGEFILE64_SOURCE
+KBUILD_CFLAGS += -D_LARGEFILE64_SOURCE
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index 69ecea6..36d2bb5 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -9,7 +9,7 @@
#We #undef __x86_64__ for kernelspace, not for userspace where
#it's needed for headers to work!
ARCH_KERNEL_DEFINES = -U__$(SUBARCH)__
-CFLAGS += $(_extra_flags_)
+KBUILD_CFLAGS += $(_extra_flags_)
CHECKFLAGS += -m64
AFLAGS += -m64
diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile
index de17d4c..0f780dd 100644
--- a/arch/um/drivers/Makefile
+++ b/arch/um/drivers/Makefile
@@ -17,7 +17,7 @@
port-objs := port_kern.o port_user.o
harddog-objs := harddog_kern.o harddog_user.o
-LDFLAGS_pcap.o := -r $(shell $(CC) $(CFLAGS) -print-file-name=libpcap.a)
+LDFLAGS_pcap.o := -r $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
targets := pcap_kern.o pcap_user.o
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index d6b3ecd..8909b07 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -20,4 +20,4 @@
include arch/um/scripts/Makefile.rules
-$(obj)/unmap.%: _c_flags = $(call unprofile,$(CFLAGS))
+$(obj)/unmap.%: _c_flags = $(call unprofile,$(KBUILD_CFLAGS))
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index 4d9e5ef..e446a99 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -28,4 +28,4 @@
include arch/um/scripts/Makefile.rules
-$(obj)/unmap.%: _c_flags = $(call unprofile,$(CFLAGS))
+$(obj)/unmap.%: _c_flags = $(call unprofile,$(KBUILD_CFLAGS))
diff --git a/arch/v850/Makefile b/arch/v850/Makefile
index 8be9aac..8b629df 100644
--- a/arch/v850/Makefile
+++ b/arch/v850/Makefile
@@ -16,11 +16,11 @@
arch_dir = arch/v850
-CFLAGS += -mv850e
+KBUILD_CFLAGS += -mv850e
# r16 is a fixed pointer to the current task
-CFLAGS += -ffixed-r16 -mno-prolog-function
-CFLAGS += -fno-builtin
-CFLAGS += -D__linux__ -DUTS_SYSNAME=\"uClinux\"
+KBUILD_CFLAGS += -ffixed-r16 -mno-prolog-function
+KBUILD_CFLAGS += -fno-builtin
+KBUILD_CFLAGS += -D__linux__ -DUTS_SYSNAME=\"uClinux\"
# By default, build a kernel that runs on the gdb v850 simulator.
KBUILD_DEFCONFIG := sim_defconfig
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index cb1035f..646292a 100644
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -50,7 +50,7 @@
# that way we can complain to the user if the CPU is insufficient.
cflags-i386 :=
cflags-x86_64 := -m32
-CFLAGS := $(LINUXINCLUDE) -g -Os -D_SETUP -D__KERNEL__ \
+KBUILD_CFLAGS := $(LINUXINCLUDE) -g -Os -D_SETUP -D__KERNEL__ \
$(cflags-$(ARCH)) \
-Wall -Wstrict-prototypes \
-march=i386 -mregparm=3 \
@@ -61,7 +61,7 @@
$(call cc-option, -fno-unit-at-a-time)) \
$(call cc-option, -fno-stack-protector) \
$(call cc-option, -mpreferred-stack-boundary=2)
-AFLAGS := $(CFLAGS) -D__ASSEMBLY__
+AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
$(obj)/zImage: IMAGE_OFFSET := 0x1000
$(obj)/zImage: EXTRA_AFLAGS := $(SVGA_MODE) $(RAMDISK)
diff --git a/arch/x86/boot/compressed/Makefile_32 b/arch/x86/boot/compressed/Makefile_32
index 22613c6..e43ff7c 100644
--- a/arch/x86/boot/compressed/Makefile_32
+++ b/arch/x86/boot/compressed/Makefile_32
@@ -11,7 +11,7 @@
LDFLAGS_vmlinux := -T
hostprogs-y := relocs
-CFLAGS := -m32 -D__KERNEL__ $(LINUX_INCLUDE) -O2 \
+KBUILD_CFLAGS := -m32 -D__KERNEL__ $(LINUX_INCLUDE) -O2 \
-fno-strict-aliasing -fPIC \
$(call cc-option,-ffreestanding) \
$(call cc-option,-fno-stack-protector)
diff --git a/arch/x86/boot/compressed/Makefile_64 b/arch/x86/boot/compressed/Makefile_64
index dc6b338..3013ad0 100644
--- a/arch/x86/boot/compressed/Makefile_64
+++ b/arch/x86/boot/compressed/Makefile_64
@@ -6,11 +6,11 @@
targets := vmlinux vmlinux.bin vmlinux.bin.gz head_64.o misc_64.o piggy.o
-CFLAGS := -m64 -D__KERNEL__ $(LINUXINCLUDE) -O2 \
+KBUILD_CFLAGS := -m64 -D__KERNEL__ $(LINUXINCLUDE) -O2 \
-fno-strict-aliasing -fPIC -mcmodel=small \
$(call cc-option, -ffreestanding) \
$(call cc-option, -fno-stack-protector)
-AFLAGS := $(CFLAGS) -D__ASSEMBLY__
+AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
LDFLAGS := -m elf_x86_64
LDFLAGS_vmlinux := -T
diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile
index 8d03de0..dcd6bb9 100644
--- a/arch/x86/vdso/Makefile
+++ b/arch/x86/vdso/Makefile
@@ -34,8 +34,8 @@
CFL := $(PROFILING) -mcmodel=small -fPIC -g0 -O2 -fasynchronous-unwind-tables -m64
-$(obj)/vclock_gettime.o: CFLAGS = $(CFL)
-$(obj)/vgetcpu.o: CFLAGS = $(CFL)
+$(obj)/vclock_gettime.o: KBUILD_CFLAGS = $(CFL)
+$(obj)/vgetcpu.o: KBUILD_CFLAGS = $(CFL)
# We also create a special relocatable object that should mirror the symbol
# table and layout of the linked DSO. With ld -R we can then refer to
diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile
index 8bffb94..3fc3300 100644
--- a/arch/x86_64/Makefile
+++ b/arch/x86_64/Makefile
@@ -70,7 +70,7 @@
cflags-$(CONFIG_CC_STACKPROTECTOR) += $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh "$(CC)" -fstack-protector )
cflags-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh "$(CC)" -fstack-protector-all )
-CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += $(cflags-y)
CFLAGS_KERNEL += $(cflags-kernel-y)
AFLAGS += -m64
diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
index acf05be..56685a8 100644
--- a/arch/xtensa/Makefile
+++ b/arch/xtensa/Makefile
@@ -28,11 +28,9 @@
export PLATFORM
# temporarily until string.h is fixed
-cflags-y += -ffreestanding
+KBUILD_CFLAGS += -ffreestanding
-cflags-y += -pipe -mlongcalls
-
-CFLAGS += $(cflags-y)
+KBUILD_CFLAGS += -pipe -mlongcalls
KBUILD_DEFCONFIG := iss_defconfig
@@ -56,7 +54,7 @@
#
-LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
head-y := arch/xtensa/kernel/head.o
core-y += arch/xtensa/kernel/ arch/xtensa/mm/
diff --git a/arch/xtensa/boot/boot-redboot/Makefile b/arch/xtensa/boot/boot-redboot/Makefile
index f53262c..74d15d0 100644
--- a/arch/xtensa/boot/boot-redboot/Makefile
+++ b/arch/xtensa/boot/boot-redboot/Makefile
@@ -19,7 +19,7 @@
OBJS := $(addprefix $(obj)/,$(boot-y))
LIBS := arch/xtensa/boot/lib/lib.a arch/xtensa/lib/lib.a
-LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
zImage: vmlinux $(OBJS) $(LIBS)
$(OBJCOPY) --strip-all -R .comment -R .xt.insn -O binary \