LXR RHEL5/Kbuild

   1#
   2# Kbuild for top-level directory of the kernel
   3# This file takes care of the following:
   4# 1) Generate asm-offsets.h
   5
   6#####
   7# 1) Generate asm-offsets.h
   8#
   9
  10offsets-file := include/asm-$(ARCH)/asm-offsets.h
  11
  12always  := $(offsets-file)
  13targets := $(offsets-file)
  14targets += arch/$(ARCH)/kernel/asm-offsets.s
  15
  16# Default sed regexp - multiline due to syntax constraints
  17define sed-y
  18        "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
  19endef
  20# Override default regexp for specific architectures
  21sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}"
  22
  23quiet_cmd_offsets = GEN     $@
  24define cmd_offsets
  25        (set -e; \
  26         echo "#ifndef __ASM_OFFSETS_H__"; \
  27         echo "#define __ASM_OFFSETS_H__"; \
  28         echo "/*"; \
  29         echo " * DO NOT MODIFY."; \
  30         echo " *"; \
  31         echo " * This file was generated by $(srctree)/Kbuild"; \
  32         echo " *"; \
  33         echo " */"; \
  34         echo ""; \
  35         sed -ne $(sed-y) $<; \
  36         echo ""; \
  37         echo "#endif" ) > $@
  38endef
  39
  40# We use internal kbuild rules to avoid the "is up to date" message from make
  41arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE
  42        $(Q)mkdir -p $(dir $@)
  43        $(call if_changed_dep,cc_s_c)
  44
  45$(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild
  46        $(Q)mkdir -p $(dir $@)
  47        $(call cmd,offsets)
  48
  49