8d36a62364
iThis fixes a bug where the generated asm-offsets.h file was saved in the source tree even with make O=. Thanks to Stephen Rothwell <sfr@canb.auug.org.au> for the report. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
1.2 KiB
Kbuild for top-level directory of the kernel
This file takes care of the following:
1) Generate asm-offsets.h
1) Generate asm-offsets.h
offsets-file := include/asm-$(ARCH)/asm-offsets.h
always := $(offsets-file) targets := $(offsets-file) targets += arch/$(ARCH)/kernel/asm-offsets.s
Default sed regexp - multiline due to syntax constraints
define sed-y
"/^->/{s:^->[^ ]* [$$#][^ ]* .*:#define \1 \2 / \3 */:; s:->::; p;}"
endef
Override default regexp for specific architectures
sed-$(CONFIG_MIPS) := "/^@@@/s///p"
quiet_cmd_offsets = GEN $@
define cmd_offsets
mkdir -p $(dir $@);
cat $< |
(set -e;
echo "#ifndef ASM_OFFSETS_H";
echo "#define ASM_OFFSETS_H";
echo "/*";
echo " * DO NOT MODIFY.";
echo " *";
echo " * This file was generated by $(srctree)/Kbuild";
echo " *";
echo " */";
echo "";
sed -ne $(sed-y);
echo "";
echo "#endif" ) > $@
endef
We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE $(Q)mkdir -p $(dir $@) $(call if_changed_dep,cc_s_c)
$(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild $(call cmd,offsets)