2e57d05116
Adjust the asm symlink support so we do not create the symlink unless really needed. We check the precense of include/asm-$ARCH by checking for the system.h file. We may end up with a stale directory so it is not enough to check if the directory is present. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
99 lines
2.4 KiB
Makefile
99 lines
2.4 KiB
Makefile
#
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# Kbuild for top-level directory of the kernel
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# This file takes care of the following:
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# 1) Generate bounds.h
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# 2) Generate asm-offsets.h (may need bounds.h)
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# 3) Check for missing system calls
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#####
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# 1) Generate bounds.h
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bounds-file := include/linux/bounds.h
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always := $(bounds-file)
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targets := $(bounds-file) kernel/bounds.s
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quiet_cmd_bounds = GEN $@
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define cmd_bounds
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(set -e; \
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echo "#ifndef __LINUX_BOUNDS_H__"; \
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echo "#define __LINUX_BOUNDS_H__"; \
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echo "/*"; \
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echo " * DO NOT MODIFY."; \
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echo " *"; \
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echo " * This file was generated by Kbuild"; \
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echo " *"; \
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echo " */"; \
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echo ""; \
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sed -ne $(sed-y) $<; \
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echo ""; \
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echo "#endif" ) > $@
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endef
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# We use internal kbuild rules to avoid the "is up to date" message from make
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kernel/bounds.s: kernel/bounds.c FORCE
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$(Q)mkdir -p $(dir $@)
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$(call if_changed_dep,cc_s_c)
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$(obj)/$(bounds-file): kernel/bounds.s Kbuild
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$(Q)mkdir -p $(dir $@)
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$(call cmd,bounds)
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#####
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# 2) Generate asm-offsets.h
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#
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offsets-file := include/asm/asm-offsets.h
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always += $(offsets-file)
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targets += $(offsets-file)
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targets += arch/$(SRCARCH)/kernel/asm-offsets.s
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# Default sed regexp - multiline due to syntax constraints
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define sed-y
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"/^->/{s:->#\(.*\):/* \1 */:; \
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s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
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s:->::; p;}"
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endef
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quiet_cmd_offsets = GEN $@
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define cmd_offsets
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(set -e; \
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echo "#ifndef __ASM_OFFSETS_H__"; \
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echo "#define __ASM_OFFSETS_H__"; \
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echo "/*"; \
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echo " * DO NOT MODIFY."; \
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echo " *"; \
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echo " * This file was generated by Kbuild"; \
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echo " *"; \
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echo " */"; \
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echo ""; \
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sed -ne $(sed-y) $<; \
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echo ""; \
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echo "#endif" ) > $@
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endef
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# We use internal kbuild rules to avoid the "is up to date" message from make
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arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
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$(obj)/$(bounds-file) FORCE
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$(Q)mkdir -p $(dir $@)
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$(call if_changed_dep,cc_s_c)
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$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
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$(call cmd,offsets)
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#####
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# 3) Check for missing system calls
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#
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quiet_cmd_syscalls = CALL $<
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cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
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PHONY += missing-syscalls
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missing-syscalls: scripts/checksyscalls.sh FORCE
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$(call cmd,syscalls)
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# Delete all targets during make clean
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clean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets)))
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