Kbuild

   1 #
   2 # Kbuild for top-level directory of U-Boot
   3 # This file takes care of the following:
   4 # 1) Generate generic-asm-offsets.h
   5 # 2) Generate asm-offsets.h
   6
   7 #####
   8 # 1) Generate generic-asm-offsets.h
   9
  10 generic-offsets-file := include/generated/generic-asm-offsets.h
  11
  12 always  := $(generic-offsets-file)
  13 targets := $(generic-offsets-file) lib/asm-offsets.s
  14
  15 quiet_cmd_generic-offsets = GEN     $@
  16 define cmd_generic-offsets
  17         (set -e; \
  18          echo "#ifndef __GENERIC_ASM_OFFSETS_H__"; \
  19          echo "#define __GENERIC_ASM_OFFSETS_H__"; \
  20          echo "/*"; \
  21          echo " * DO NOT MODIFY."; \
  22          echo " *"; \
  23          echo " * This file was generated by Kbuild"; \
  24          echo " *"; \
  25          echo " */"; \
  26          echo ""; \
  27          sed -ne $(sed-y) $<; \
  28          echo ""; \
  29          echo "#endif" ) > $@
  30 endef
  31
  32 # We use internal kbuild rules to avoid the "is up to date" message from make
  33 lib/asm-offsets.s: lib/asm-offsets.c FORCE
  34         $(Q)mkdir -p $(dir $@)
  35         $(call if_changed_dep,cc_s_c)
  36
  37 $(obj)/$(generic-offsets-file): lib/asm-offsets.s Kbuild
  38         $(Q)mkdir -p $(dir $@)
  39         $(call cmd,generic-offsets)
  40
  41 #####
  42 # 2) Generate asm-offsets.h
  43 #
  44
  45 ifneq ($(wildcard $(srctree)/arch/$(ARCH)/lib/asm-offsets.c),)
  46 offsets-file := include/generated/asm-offsets.h
  47 endif
  48
  49 always  += $(offsets-file)
  50 targets += $(offsets-file)
  51 targets += arch/$(ARCH)/lib/asm-offsets.s
  52
  53
  54 # Default sed regexp - multiline due to syntax constraints
  55 define sed-y
  56         "/^->/{s:->#\(.*\):/* \1 */:; \
  57         s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
  58         s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
  59         s:->::; p;}"
  60 endef
  61
  62 CFLAGS_asm-offsets.o := -DDO_DEPS_ONLY
  63
  64 quiet_cmd_offsets = GEN     $@
  65 define cmd_offsets
  66         (set -e; \
  67          echo "#ifndef __ASM_OFFSETS_H__"; \
  68          echo "#define __ASM_OFFSETS_H__"; \
  69          echo "/*"; \
  70          echo " * DO NOT MODIFY."; \
  71          echo " *"; \
  72          echo " * This file was generated by Kbuild"; \
  73          echo " *"; \
  74          echo " */"; \
  75          echo ""; \
  76          sed -ne $(sed-y) $<; \
  77          echo ""; \
  78          echo "#endif" ) > $@
  79 endef
  80
  81 # We use internal kbuild rules to avoid the "is up to date" message from make
  82 arch/$(ARCH)/lib/asm-offsets.s: arch/$(ARCH)/lib/asm-offsets.c FORCE
  83         $(Q)mkdir -p $(dir $@)
  84         $(call if_changed_dep,cc_s_c)
  85
  86 $(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s Kbuild
  87         $(call cmd,offsets)