android_kernel_xiaomi_sm8350/arch/blackfin/Makefile
Sam Ravnborg a0f97e06a4 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>
2007-10-14 22:21:35 +02:00

109 lines
3.0 KiB
Makefile

#
# arch/blackfin/Makefile
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
CROSS_COMPILE ?= bfin-uclinux-
LDFLAGS_vmlinux := -X
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
GZFLAGS := -9
CFLAGS_MODULE += -mlong-calls
KALLSYMS += --symbol-prefix=_
KBUILD_DEFCONFIG := BF537-STAMP_defconfig
# setup the machine name and the machine dependent settings
machine-$(CONFIG_BF531) := bf533
machine-$(CONFIG_BF532) := bf533
machine-$(CONFIG_BF533) := bf533
machine-$(CONFIG_BF534) := bf537
machine-$(CONFIG_BF536) := bf537
machine-$(CONFIG_BF537) := bf537
machine-$(CONFIG_BF542) := bf548
machine-$(CONFIG_BF544) := bf548
machine-$(CONFIG_BF548) := bf548
machine-$(CONFIG_BF549) := bf548
machine-$(CONFIG_BF561) := bf561
MACHINE := $(machine-y)
export MACHINE
cpu-$(CONFIG_BF531) := bf531
cpu-$(CONFIG_BF532) := bf532
cpu-$(CONFIG_BF533) := bf533
cpu-$(CONFIG_BF534) := bf534
cpu-$(CONFIG_BF536) := bf536
cpu-$(CONFIG_BF537) := bf537
cpu-$(CONFIG_BF542) := bf542
cpu-$(CONFIG_BF544) := bf544
cpu-$(CONFIG_BF548) := bf548
cpu-$(CONFIG_BF549) := bf549
cpu-$(CONFIG_BF561) := bf561
rev-$(CONFIG_BF_REV_0_0) := 0.0
rev-$(CONFIG_BF_REV_0_1) := 0.1
rev-$(CONFIG_BF_REV_0_2) := 0.2
rev-$(CONFIG_BF_REV_0_3) := 0.3
rev-$(CONFIG_BF_REV_0_4) := 0.4
rev-$(CONFIG_BF_REV_0_5) := 0.5
rev-$(CONFIG_BF_REV_NONE) := none
rev-$(CONFIG_BF_REV_ANY) := any
KBUILD_CFLAGS += -mcpu=$(cpu-y)-$(rev-y)
AFLAGS += -mcpu=$(cpu-y)-$(rev-y)
head-y := arch/$(ARCH)/mach-$(MACHINE)/head.o arch/$(ARCH)/kernel/init_task.o
core-y += arch/$(ARCH)/kernel/ arch/$(ARCH)/mm/ arch/$(ARCH)/mach-common/
# If we have a machine-specific directory, then include it in the build.
ifneq ($(machine-y),)
core-y += arch/$(ARCH)/mach-$(MACHINE)/
core-y += arch/$(ARCH)/mach-$(MACHINE)/boards/
endif
libs-y += arch/$(ARCH)/lib/
drivers-$(CONFIG_OPROFILE) += arch/$(ARCH)/oprofile/
# Update machine arch symlinks if something which affects
# them changed. We use .mach to indicate when they were updated
# last, otherwise make uses the target directory mtime.
include/asm-blackfin/.mach: $(wildcard include/config/arch/*.h) include/config/auto.conf
@echo ' SYMLINK include/asm-$(ARCH)/mach-$(MACHINE) -> include/asm-$(ARCH)/mach'
ifneq ($(KBUILD_SRC),)
$(Q)mkdir -p include/asm-$(ARCH)
$(Q)ln -fsn $(srctree)/include/asm-$(ARCH)/mach-$(MACHINE) include/asm-$(ARCH)/mach
else
$(Q)ln -fsn mach-$(MACHINE) include/asm-$(ARCH)/mach
endif
@touch $@
CLEAN_FILES += \
include/asm-$(ARCH)/asm-offsets.h \
arch/$(ARCH)/kernel/asm-offsets.s \
include/asm-$(ARCH)/mach \
include/asm-$(ARCH)/.mach
archprepare: include/asm-blackfin/.mach
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
all: vmImage
boot := arch/$(ARCH)/boot
BOOT_TARGETS = vmImage
.PHONY: $(BOOT_TARGETS)
$(BOOT_TARGETS): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
define archhelp
echo '* vmImage - Kernel-only image for U-Boot (arch/$(ARCH)/boot/vmImage)'
endef