# # 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. # # Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle # DECStation modifications by Paul M. Antoine, 1996 # Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki # # This file is included by the global makefile so that you can add your own # architecture-specific flags and dependencies. Remember to do have actions # for "archclean" cleaning up for this architecture. # archscripts: scripts_basic $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs KBUILD_DEFCONFIG := 32r2el_defconfig # # Select the object file format to substitute into the linker script. # ifdef CONFIG_CPU_LITTLE_ENDIAN 32bit-tool-archpref = mipsel 64bit-tool-archpref = mips64el 32bit-bfd = elf32-tradlittlemips 64bit-bfd = elf64-tradlittlemips 32bit-emul = elf32ltsmip 64bit-emul = elf64ltsmip else 32bit-tool-archpref = mips 64bit-tool-archpref = mips64 32bit-bfd = elf32-tradbigmips 64bit-bfd = elf64-tradbigmips 32bit-emul = elf32btsmip 64bit-emul = elf64btsmip endif ifdef CONFIG_32BIT tool-archpref = $(32bit-tool-archpref) UTS_MACHINE := mips endif ifdef CONFIG_64BIT tool-archpref = $(64bit-tool-archpref) UTS_MACHINE := mips64 endif ifneq ($(SUBARCH),$(ARCH)) ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) endif endif ifdef CONFIG_FUNCTION_GRAPH_TRACER ifndef KBUILD_MCOUNT_RA_ADDRESS ifeq ($(call cc-option-yn,-mmcount-ra-address), y) cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS endif endif endif cflags-y += $(call cc-option, -mno-check-zero-division) ifdef CONFIG_32BIT ld-emul = $(32bit-emul) vmlinux-32 = vmlinux vmlinux-64 = vmlinux.64 cflags-y += -mabi=32 endif ifdef CONFIG_64BIT ld-emul = $(64bit-emul) vmlinux-32 = vmlinux.32 vmlinux-64 = vmlinux cflags-y += -mabi=64 endif all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32) all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64) all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz # # GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel # code since it only slows down the whole thing. At some point we might make # use of global pointer optimizations but their use of $28 conflicts with # the current pointer optimization. # # The DECStation requires an ECOFF kernel for remote booting, other MIPS # machines may also. Since BFD is incredibly buggy with respect to # crossformat linking we rely on the elf2ecoff tool for format conversion. # cflags-y += -G 0 -mno-abicalls -fno-pic -pipe cflags-y += -msoft-float LDFLAGS_vmlinux += -G 0 -static -n -nostdlib KBUILD_AFLAGS_MODULE += -mlong-calls KBUILD_CFLAGS_MODULE += -mlong-calls ifeq ($(CONFIG_RELOCATABLE),y) LDFLAGS_vmlinux += --emit-relocs endif # # pass -msoft-float to GAS if it supports it. However on newer binutils # (specifically newer than 2.24.51.20140728) we then also need to explicitly # set ".set hardfloat" in all files which manipulate floating point registers. # ifneq ($(call as-option,-Wa$(comma)-msoft-float,),) cflags-y += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float endif cflags-y += -ffreestanding # # We explicitly add the endianness specifier if needed, this allows # to compile kernels with a toolchain for the other endianness. We # carefully avoid to add it redundantly because gcc 3.3/3.4 complains # when fed the toolchain default! # # Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of # 2006-10-10 don't properly change the predefined symbols if -EB / -EL # are used, so we kludge that here. A bug has been filed at # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413. # undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__ undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__ predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__ predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__ cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be)) cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le)) cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \ -fno-omit-frame-pointer # Some distribution-specific toolchains might pass the -fstack-check # option during the build, which adds a simple stack-probe at the beginning # of every function. This stack probe is to ensure that there is enough # stack space, else a SEGV is generated. This is not desirable for MIPS # as kernel stacks are small, placed in unmapped virtual memory, and do not # grow when overflowed. Especially on SGI IP27 platforms, this check will # lead to a NULL pointer dereference in _raw_spin_lock_irq. # # In disassembly, this stack probe appears at the top of a function as: # sd zero,(sp) # Where is a negative value. # cflags-y += -fno-stack-check # # CPU-dependent compiler/assembler options for optimization. # cflags-$(CONFIG_CPU_R3000) += -march=r3000 cflags-$(CONFIG_CPU_TX39XX) += -march=r3900 cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \ -Wa,--trap cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \ -Wa,--trap cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \ -Wa,--trap cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \ -Wa,--trap cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \ -Wa,--trap cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx) cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d) cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \ -Wa,--trap cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON)))) cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon endif cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1 cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,) cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,) cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,) # For smartmips configurations, there are hundreds of warnings due to ISA overrides # in assembly and header files. smartmips is only supported for MIPS32r1 onwards # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or # similar directives in the kernel will spam the build logs with the following warnings: # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater # or # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has # been fixed properly. mips-cflags := $(cflags-y) ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y) smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips) cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn endif ifeq ($(CONFIG_CPU_MICROMIPS),y) micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips) cflags-$(micromips-ase) += -mmicromips endif ifeq ($(CONFIG_CPU_HAS_MSA),y) toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa) cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA endif toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt) cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which # only warns xpa-cflags-y := $(mips-cflags) xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa) cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc) cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC # # Firmware support # libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/ libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/ libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/ libs-y += arch/mips/fw/lib/ # # Kernel compression # ifdef CONFIG_SYS_SUPPORTS_ZBOOT COMPRESSION_FNAME = vmlinuz else COMPRESSION_FNAME = vmlinux endif # # Board-dependent options and extra files # include arch/mips/Kbuild.platforms ifdef CONFIG_PHYSICAL_START load-y = $(CONFIG_PHYSICAL_START) endif # Sign-extend the entry point to 64 bits if retrieved as a 32-bit number. entry-y = $(shell $(OBJDUMP) -f vmlinux 2>/dev/null \ | sed -n '/^start address / { \ s/^.* //; \ s/0x\([0-7].......\)$$/0x00000000\1/; \ s/0x\(........\)$$/0xffffffff\1/; p }') cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic drivers-$(CONFIG_PCI) += arch/mips/pci/ # # Automatically detect the build format. By default we choose # the elf format according to the load address. # We can always force a build with a 64-bits symbol format by # passing 'KBUILD_SYM32=no' option to the make's command line. # ifdef CONFIG_64BIT ifndef KBUILD_SYM32 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0) KBUILD_SYM32 = y endif endif ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy) cflags-y += -msym32 -DKBUILD_64BIT_SYM32 else ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y) $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32) endif endif endif KBUILD_AFLAGS += $(cflags-y) KBUILD_CFLAGS += $(cflags-y) KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ VMLINUX_ENTRY_ADDRESS=$(entry-y) \ PLATFORM="$(platform-y)" \ ITS_INPUTS="$(its-y)" ifdef CONFIG_32BIT bootvars-y += ADDR_BITS=32 endif ifdef CONFIG_64BIT bootvars-y += ADDR_BITS=64 endif # This is required to get dwarf unwinding tables into .debug_frame # instead of .eh_frame so we don't discard them. KBUILD_CFLAGS += -fno-asynchronous-unwind-tables LDFLAGS += -m $(ld-emul) ifdef CONFIG_MIPS CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \ sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') endif OBJCOPYFLAGS += --remove-section=.reginfo head-y := arch/mips/kernel/head.o libs-y += arch/mips/lib/ libs-y += arch/mips/math-emu/ # See arch/mips/Kbuild for content of core part of the kernel core-y += arch/mips/ drivers-$(CONFIG_MIPS_CRC_SUPPORT) += arch/mips/crypto/ drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/ # suspend and hibernation support drivers-$(CONFIG_PM) += arch/mips/power/ # boot image targets (arch/mips/boot/) boot-y := vmlinux.bin boot-y += vmlinux.ecoff boot-y += vmlinux.srec ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0) boot-y += uImage boot-y += uImage.bin boot-y += uImage.bz2 boot-y += uImage.gz boot-y += uImage.lzma boot-y += uImage.lzo endif boot-y += vmlinux.itb boot-y += vmlinux.gz.itb boot-y += vmlinux.bz2.itb boot-y += vmlinux.lzma.itb boot-y += vmlinux.lzo.itb # compressed boot image targets (arch/mips/boot/compressed/) bootz-y := vmlinuz bootz-y += vmlinuz.bin bootz-y += vmlinuz.ecoff bootz-y += vmlinuz.srec ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0) bootz-y += uzImage.bin endif ifdef CONFIG_LASAT rom.bin rom.sw: vmlinux $(Q)$(MAKE) $(build)=arch/mips/lasat/image \ $(bootvars-y) $@ endif # # Some machines like the Indy need 32-bit ELF binaries for booting purposes. # Other need ECOFF, so we build a 32-bit ELF binary for them which we then # convert to ECOFF using elf2ecoff. # quiet_cmd_32 = OBJCOPY $@ cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ vmlinux.32: vmlinux $(call cmd,32) # # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit # ELF files from 32-bit files by conversion. # quiet_cmd_64 = OBJCOPY $@ cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@ vmlinux.64: vmlinux $(call cmd,64) all: $(all-y) # boot $(boot-y): $(vmlinux-32) FORCE $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ $(bootvars-y) arch/mips/boot/$@ ifdef CONFIG_SYS_SUPPORTS_ZBOOT # boot/compressed $(bootz-y): $(vmlinux-32) FORCE $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@ else vmlinuz: FORCE @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' /bin/false endif CLEAN_FILES += vmlinux.32 vmlinux.64 # device-trees core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/ %.dtb %.dtb.S %.dtb.o: | scripts $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@ PHONY += dtbs dtbs: scripts $(Q)$(MAKE) $(build)=arch/mips/boot/dts PHONY += dtbs_install dtbs_install: $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts archprepare: ifdef CONFIG_MIPS32_N32 @$(kecho) ' Checking missing-syscalls for N32' $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32" endif ifdef CONFIG_MIPS32_O32 @$(kecho) ' Checking missing-syscalls for O32' $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32" endif install: $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) ifdef CONFIG_SYS_SUPPORTS_ZBOOT $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE) endif $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) archclean: $(Q)$(MAKE) $(clean)=arch/mips/boot $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed $(Q)$(MAKE) $(clean)=arch/mips/boot/tools $(Q)$(MAKE) $(clean)=arch/mips/lasat define archhelp echo ' install - install kernel into $(INSTALL_PATH)' echo ' vmlinux.ecoff - ECOFF boot image' echo ' vmlinux.bin - Raw binary boot image' echo ' vmlinux.srec - SREC boot image' echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' echo ' vmlinuz - Compressed boot(zboot) image' echo ' vmlinuz.ecoff - ECOFF zboot image' echo ' vmlinuz.bin - Raw binary zboot image' echo ' vmlinuz.srec - SREC zboot image' echo ' uImage - U-Boot image' echo ' uImage.bin - U-Boot image (uncompressed)' echo ' uImage.bz2 - U-Boot image (bz2)' echo ' uImage.gz - U-Boot image (gzip)' echo ' uImage.lzma - U-Boot image (lzma)' echo ' uImage.lzo - U-Boot image (lzo)' echo ' uzImage.bin - U-Boot image (self-extracting)' echo ' dtbs - Device-tree blobs for enabled boards' echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' echo echo ' These will be default as appropriate for a configured platform.' echo echo ' If you are targeting a system supported by generic kernels you may' echo ' configure the kernel for a given architecture target like so:' echo echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig ' echo echo ' Where BOARDS is some subset of the following:' for board in $(sort $(BOARDS)); do echo " $${board}"; done echo echo ' Specifically the following generic default configurations are' echo ' supported:' echo $(foreach cfg,$(generic_defconfigs), printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);) echo echo ' The following legacy default configurations have been converted to' echo ' generic and can still be used:' echo $(foreach cfg,$(sort $(legacy_defconfigs)), printf " %-24s - Build $($(cfg)-y)\n" $(cfg);) echo echo ' Otherwise, the following default configurations are available:' endef generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic generic_defconfigs := # # If the user generates a generic kernel configuration without specifying a # list of boards to include the config fragments for, default to including all # available board config fragments. # ifeq ($(BOARDS),) BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config))) endif # # Generic kernel configurations which merge generic_defconfig with the # appropriate config fragments from arch/mips/configs/generic/, resulting in # the ability to easily configure the kernel for a given architecture, # endianness & set of boards without duplicating the needed configuration in # hundreds of defconfig files. # define gen_generic_defconfigs $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3), target := $(bits)$(rev)$(filter el,$(endian))_defconfig generic_defconfigs += $$(target) $$(target): $(generic_config_dir)/$(bits)$(rev).config $$(target): $(generic_config_dir)/$(endian).config ))) endef $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el)) $(eval $(call gen_generic_defconfigs,micro32,r2,eb el)) define describe_generic_defconfig $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1))))) endef .PHONY: $(generic_defconfigs) $(generic_defconfigs): $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \ grep -Ev '^#' $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@ $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \ KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \ $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \ "$(origin BOARDS)" $(BOARDS) $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig # # Prevent generic merge_config rules attempting to merge single fragments # $(generic_config_dir)/%.config: ; # # Prevent direct use of generic_defconfig, which is intended to be used as the # basis of the various ISA-specific targets generated above. # .PHONY: generic_defconfig generic_defconfig: $(Q)echo "generic_defconfig is not intended for direct use, but should instead be" $(Q)echo "used via an ISA-specific target from the following list:" $(Q)echo $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done $(Q)echo $(Q)false # # Legacy defconfig compatibility - these targets used to be real defconfigs but # now that the boards have been converted to use the generic kernel they are # wrappers around the generic rules above. # legacy_defconfigs += ocelot_defconfig ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot legacy_defconfigs += sead3_defconfig sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3 legacy_defconfigs += sead3micro_defconfig sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3 legacy_defconfigs += xilfpga_defconfig xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga .PHONY: $(legacy_defconfigs) $(legacy_defconfigs): $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)