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![Masahiro Yamada](/assets/img/avatar_default.png)
Evaluating cc-name invokes the compiler every time even when you are not compiling anything, like 'make help'. This is not efficient. The compiler type has been already detected in the Kconfig stage. Use CONFIG_CC_IS_CLANG, instead. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Paul Burton <paul.burton@mips.com> (MIPS) Acked-by: Joel Stanley <joel@jms.id.au>
425 lines
14 KiB
Makefile
425 lines
14 KiB
Makefile
# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies. Remember to do have actions
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# for "archclean" and "archdep" for cleaning up and making dependencies for
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# this architecture.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1994 by Linus Torvalds
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# Changes for PPC by Gary Thomas
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# Rewritten by Cort Dougan and Paul Mackerras
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#
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HAS_BIARCH := $(call cc-option-yn, -m32)
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# Set default 32 bits cross compilers for vdso and boot wrapper
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CROSS32_COMPILE ?=
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ifeq ($(HAS_BIARCH),y)
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ifeq ($(CROSS32_COMPILE),)
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ifdef CONFIG_PPC32
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# These options will be overridden by any -mcpu option that the CPU
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# or platform code sets later on the command line, but they are needed
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# to set a sane 32-bit cpu target for the 64-bit cross compiler which
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# may default to the wrong ISA.
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KBUILD_CFLAGS += -mcpu=powerpc
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KBUILD_AFLAGS += -mcpu=powerpc
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endif
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endif
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endif
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ifeq ($(CROSS_COMPILE),)
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KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
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else
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KBUILD_DEFCONFIG := ppc64_defconfig
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endif
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ifdef CONFIG_PPC64
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new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
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ifeq ($(new_nm),y)
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NM := $(NM) --synthetic
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endif
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endif
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# BITS is used as extension for files which are available in a 32 bit
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# and a 64 bit version to simplify shared Makefiles.
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# e.g.: obj-y += foo_$(BITS).o
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export BITS
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ifdef CONFIG_PPC64
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BITS := 64
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else
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BITS := 32
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endif
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machine-y = ppc
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machine-$(CONFIG_PPC64) += 64
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machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
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UTS_MACHINE := $(subst $(space),,$(machine-y))
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# XXX This needs to be before we override LD below
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ifdef CONFIG_PPC32
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KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
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else
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KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
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ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
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# Have the linker provide sfpr if possible.
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# There is a corresponding test in arch/powerpc/lib/Makefile
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KBUILD_LDFLAGS_MODULE += --save-restore-funcs
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else
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KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
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endif
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endif
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ifdef CONFIG_CPU_LITTLE_ENDIAN
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KBUILD_CFLAGS += -mlittle-endian
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KBUILD_LDFLAGS += -EL
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LDEMULATION := lppc
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GNUTARGET := powerpcle
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MULTIPLEWORD := -mno-multiple
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KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
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else
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KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
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KBUILD_LDFLAGS += -EB
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LDEMULATION := ppc
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GNUTARGET := powerpc
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MULTIPLEWORD := -mmultiple
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endif
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ifdef CONFIG_PPC64
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cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
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cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
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aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
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aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
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endif
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ifndef CONFIG_CC_IS_CLANG
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cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
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endif
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cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
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cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
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aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
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aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
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ifeq ($(HAS_BIARCH),y)
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KBUILD_CFLAGS += -m$(BITS)
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KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
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KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
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KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET)
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endif
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cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
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ifdef CONFIG_PPC64
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cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
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else
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cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
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endif
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LDFLAGS_vmlinux-y := -Bstatic
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LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
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LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
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LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
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ifdef CONFIG_PPC64
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ifeq ($(call cc-option-yn,-mcmodel=medium),y)
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# -mcmodel=medium breaks modules because it uses 32bit offsets from
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# the TOC pointer to create pointers where possible. Pointers into the
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# percpu data area are created by this method.
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#
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# The kernel module loader relocates the percpu data section from the
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# original location (starting with 0xd...) to somewhere in the base
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# kernel percpu data space (starting with 0xc...). We need a full
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# 64bit relocation for this to work, hence -mcmodel=large.
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KBUILD_CFLAGS_MODULE += -mcmodel=large
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else
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export NO_MINIMAL_TOC := -mno-minimal-toc
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endif
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endif
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CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
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ifdef CONFIG_CPU_LITTLE_ENDIAN
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
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AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
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else
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
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AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
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endif
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
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CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
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CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
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ifdef CONFIG_PPC_BOOK3S_64
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ifdef CONFIG_CPU_LITTLE_ENDIAN
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CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
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else
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
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endif
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else
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CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
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endif
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ifdef CONFIG_FUNCTION_TRACER
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CC_FLAGS_FTRACE := -pg
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ifdef CONFIG_MPROFILE_KERNEL
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CC_FLAGS_FTRACE += -mprofile-kernel
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endif
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# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
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ifndef CONFIG_CC_IS_CLANG
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CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
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endif
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endif
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CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
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# Altivec option not allowed with e500mc64 in GCC.
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ifdef CONFIG_ALTIVEC
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E5500_CPU := -mcpu=powerpc64
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else
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E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
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endif
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CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
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CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
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ifdef CONFIG_PPC32
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ifdef CONFIG_PPC_E500MC
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CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
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else
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CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
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endif
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endif
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asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
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KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
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KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
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KBUILD_CFLAGS += $(call cc-option,-msoft-float)
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KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
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CPP = $(CC) -E $(KBUILD_CFLAGS)
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CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
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ifdef CONFIG_CPU_BIG_ENDIAN
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CHECKFLAGS += -D__BIG_ENDIAN__
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else
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CHECKFLAGS += -D__LITTLE_ENDIAN__
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endif
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ifdef CONFIG_476FPE_ERR46
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KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
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-T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
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endif
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# No AltiVec or VSX instructions when building kernel
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KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
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KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
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# No SPE instruction when building kernel
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# (We use all available options to help semi-broken compilers)
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KBUILD_CFLAGS += $(call cc-option,-mno-spe)
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KBUILD_CFLAGS += $(call cc-option,-mspe=no)
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# Enable unit-at-a-time mode when possible. It shrinks the
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# kernel considerably.
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KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
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# FIXME: the module load should be taught about the additional relocs
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# generated by this.
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# revert to pre-gcc-4.4 behaviour of .eh_frame
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KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
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# Never use string load/store instructions as they are
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# often slow when they are implemented at all
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KBUILD_CFLAGS += $(call cc-option,-mno-string)
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ifdef CONFIG_6xx
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KBUILD_CFLAGS += -mcpu=powerpc
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endif
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cpu-as-$(CONFIG_4xx) += -Wa,-m405
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cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
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cpu-as-$(CONFIG_E200) += -Wa,-me200
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cpu-as-$(CONFIG_E500) += -Wa,-me500
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# When using '-many -mpower4' gas will first try and find a matching power4
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# mnemonic and failing that it will allow any valid mnemonic that GAS knows
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# about. GCC will pass -many to GAS when assembling, clang does not.
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cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
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cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
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KBUILD_AFLAGS += $(cpu-as-y)
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KBUILD_CFLAGS += $(cpu-as-y)
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KBUILD_AFLAGS += $(aflags-y)
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KBUILD_CFLAGS += $(cflags-y)
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head-y := arch/powerpc/kernel/head_$(BITS).o
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head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
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head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
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head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
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head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
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head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
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head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
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head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
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head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
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# See arch/powerpc/Kbuild for content of core part of the kernel
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core-y += arch/powerpc/
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drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
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# Default to zImage, override when needed
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all: zImage
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# With make 3.82 we cannot mix normal and wildcard targets
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BOOT_TARGETS1 := zImage zImage.initrd uImage
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BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
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PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
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boot := arch/$(ARCH)/boot
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$(BOOT_TARGETS1): vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
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$(BOOT_TARGETS2): vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
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bootwrapper_install:
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$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
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# Used to create 'merged defconfigs'
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# To use it $(call) it with the first argument as the base defconfig
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# and the second argument as a space separated list of .config files to merge,
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# without the .config suffix.
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define merge_into_defconfig
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
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-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
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$(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
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+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
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endef
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PHONY += pseries_le_defconfig
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pseries_le_defconfig:
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$(call merge_into_defconfig,pseries_defconfig,le)
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PHONY += ppc64le_defconfig
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ppc64le_defconfig:
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$(call merge_into_defconfig,ppc64_defconfig,le)
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PHONY += powernv_be_defconfig
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powernv_be_defconfig:
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$(call merge_into_defconfig,powernv_defconfig,be)
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PHONY += mpc85xx_defconfig
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mpc85xx_defconfig:
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$(call merge_into_defconfig,mpc85xx_basic_defconfig,\
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85xx-32bit 85xx-hw fsl-emb-nonhw)
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PHONY += mpc85xx_smp_defconfig
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mpc85xx_smp_defconfig:
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$(call merge_into_defconfig,mpc85xx_basic_defconfig,\
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85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
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PHONY += corenet32_smp_defconfig
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corenet32_smp_defconfig:
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$(call merge_into_defconfig,corenet_basic_defconfig,\
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85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
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PHONY += corenet64_smp_defconfig
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corenet64_smp_defconfig:
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$(call merge_into_defconfig,corenet_basic_defconfig,\
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85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
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PHONY += mpc86xx_defconfig
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mpc86xx_defconfig:
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$(call merge_into_defconfig,mpc86xx_basic_defconfig,\
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86xx-hw fsl-emb-nonhw)
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PHONY += mpc86xx_smp_defconfig
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mpc86xx_smp_defconfig:
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$(call merge_into_defconfig,mpc86xx_basic_defconfig,\
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86xx-smp 86xx-hw fsl-emb-nonhw)
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PHONY += ppc32_allmodconfig
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ppc32_allmodconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
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-f $(srctree)/Makefile allmodconfig
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PHONY += ppc64le_allmodconfig
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ppc64le_allmodconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
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-f $(srctree)/Makefile allmodconfig
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PHONY += ppc64_book3e_allmodconfig
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ppc64_book3e_allmodconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
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-f $(srctree)/Makefile allmodconfig
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define archhelp
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@echo '* zImage - Build default images selected by kernel config'
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@echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
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@echo ' uImage - U-Boot native image format'
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@echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
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@echo ' versions which do not support device trees'
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@echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
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@echo ' simpleImage.<dt> - Firmware independent image.'
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@echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
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@echo ' install - Install kernel using'
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@echo ' (your) ~/bin/$(INSTALLKERNEL) or'
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@echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
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@echo ' install to $$(INSTALL_PATH) and run lilo'
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@echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
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@echo ''
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@echo ' Targets with <dt> embed a device tree blob inside the image'
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@echo ' These targets support board with firmware that does not'
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@echo ' support passing a device tree directly. Replace <dt> with the'
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@echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
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@echo ' (minus the .dts extension).'
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endef
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install:
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$(Q)$(MAKE) $(build)=$(boot) install
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vdso_install:
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ifdef CONFIG_PPC64
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$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
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endif
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$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
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archclean:
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$(Q)$(MAKE) $(clean)=$(boot)
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archprepare: checkbin
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ifdef CONFIG_STACKPROTECTOR
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prepare: stack_protector_prepare
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stack_protector_prepare: prepare0
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ifdef CONFIG_PPC64
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$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
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else
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$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
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endif
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endif
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# Check toolchain versions:
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# - gcc-4.6 is the minimum kernel-wide version so nothing required.
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checkbin:
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@if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
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&& $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
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echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
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echo 'in some circumstances.' ; \
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echo -n '*** Please use a different binutils version.' ; \
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false ; \
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fi
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