a0f97e06a4
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>
44 lines
1.1 KiB
Makefile
44 lines
1.1 KiB
Makefile
#
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# linux/arch/sh/boot/compressed/Makefile
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#
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# create a compressed vmlinux image from the original vmlinux
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#
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targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
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EXTRA_AFLAGS := -traditional
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OBJECTS = $(obj)/head.o $(obj)/misc.o
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ifdef CONFIG_SH_STANDARD_BIOS
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OBJECTS += $(obj)/../../kernel/sh_bios.o
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endif
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#
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# IMAGE_OFFSET is the load offset of the compression loader
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#
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IMAGE_OFFSET := $(shell /bin/bash -c 'printf "0x%08x" \
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$$[$(CONFIG_PAGE_OFFSET) + \
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$(CONFIG_MEMORY_START) + \
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$(CONFIG_BOOT_LINK_OFFSET)]')
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LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
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LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup -T $(obj)/../../kernel/vmlinux.lds
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$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(LIBGCC) FORCE
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$(call if_changed,ld)
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@:
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$(obj)/vmlinux.bin: vmlinux FORCE
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$(call if_changed,objcopy)
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$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
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$(call if_changed,gzip)
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LDFLAGS_piggy.o := -r --format binary --oformat elf32-sh-linux -T
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OBJCOPYFLAGS += -R .empty_zero_page
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$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
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$(call if_changed,ld)
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