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The kbuild system takes advantage of an incorrect behavior in GNU make. Once this behavior is fixed, all files in the kernel rebuild every time, even if nothing has changed. This patch ensures kbuild works with both the incorrect and correct behaviors of GNU make. For more details on the incorrect behavior, see: http://lists.gnu.org/archive/html/bug-make/2006-03/msg00003.html Changes in this patch: - Keep all targets that are to be marked .PHONY in a variable, PHONY. - Add .PHONY: $(PHONY) to mark them properly. - Remove any $(PHONY) files from the $? list when determining whether targets are up-to-date or not. Signed-off-by: Paul Smith <psmith@gnu.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
108 lines
3.1 KiB
Makefile
108 lines
3.1 KiB
Makefile
#
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# arch/arm26/Makefile
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1995-2001 by Russell King
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# Copyright (c) 2004 Ian Molton
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LDFLAGS_vmlinux :=-p -X
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CPPFLAGS_vmlinux.lds = -DTEXTADDR=$(TEXTADDR) -DDATAADDR=$(DATAADDR)
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OBJCOPYFLAGS :=-O binary -R .note -R .comment -S
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GZFLAGS :=-9
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ifeq ($(CONFIG_FRAME_POINTER),y)
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CFLAGS +=-fno-omit-frame-pointer -mno-sched-prolog
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endif
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CFLAGS_BOOT :=-mapcs-26 -mcpu=arm3 -msoft-float -Uarm
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CFLAGS +=-mapcs-26 -mcpu=arm3 -msoft-float -Uarm
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AFLAGS +=-mapcs-26 -mcpu=arm3 -msoft-float
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ifeq ($(CONFIG_XIP_KERNEL),y)
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TEXTADDR := 0x03880000
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DATAADDR := 0x02080000
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else
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TEXTADDR := 0x02080000
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DATAADDR := .
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endif
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head-y := arch/arm26/kernel/head.o arch/arm26/kernel/init_task.o
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ifeq ($(incdir-y),)
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incdir-y :=
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endif
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INCDIR :=
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export MACHINE TEXTADDR GZFLAGS CFLAGS_BOOT
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# If we have a machine-specific directory, then include it in the build.
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core-y += arch/arm26/kernel/ arch/arm26/mm/ arch/arm26/machine/
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core-$(CONFIG_FPE_NWFPE) += arch/arm26/nwfpe/
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libs-y += arch/arm26/lib/
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# Default target when executing plain make
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all: zImage
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boot := arch/arm26/boot
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PHONY += maketools FORCE
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maketools: FORCE
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# Convert bzImage to zImage
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bzImage: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/zImage
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zImage Image bootpImage xipImage: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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zinstall install: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $@
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# We use MRPROPER_FILES and CLEAN_FILES now
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archclean:
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$(Q)$(MAKE) $(clean)=$(boot)
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# My testing targets (that short circuit a few dependencies)
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zImg:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/zImage
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Img:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/Image
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bp:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
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i:; $(Q)$(MAKE) $(build)=$(boot) install
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zi:; $(Q)$(MAKE) $(build)=$(boot) zinstall
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#
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# Configuration targets. Use these to select a
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# configuration for your architecture
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%_config:
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@( \
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CFG=$(@:_config=); \
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if [ -f arch/arm26/def-configs/$$CFG ]; then \
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[ -f .config ] && mv -f .config .config.old; \
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cp arch/arm26/def-configs/$$CFG .config; \
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echo "*** Default configuration for $$CFG installed"; \
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echo "*** Next, you may run 'make oldconfig'"; \
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else \
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echo "$$CFG does not exist"; \
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fi; \
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)
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define archhelp
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echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
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echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
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echo ' bootpImage - Combined zImage and initial RAM disk'
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echo ' xipImage - eXecute In Place capable image for ROM use (arch/$(ARCH)/boot/xipImage)'
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echo ' initrd - Create an initial image'
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echo ' install - Install uncompressed kernel'
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echo ' zinstall - Install compressed kernel'
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echo ' Install using (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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endef
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