applets/Kbuild.src

   1 # Makefile for busybox
   2 #
   3 # Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
   4 #
   5 # Licensed under GPLv2, see file LICENSE in this source tree.
   6
   7 obj-y :=
   8 obj-y += applets.o
   9
  10 hostprogs-y:=
  11 hostprogs-y += usage usage_pod applet_tables
  12
  13 always:= $(hostprogs-y)
  14
  15 # Generated files need additional love
  16
  17 # This trick decreases amount of rebuilds
  18 # if tree is merely renamed/copied
  19 ifeq ($(srctree),$(objtree))
  20 srctree_slash =
  21 else
  22 srctree_slash = $(srctree)/
  23 endif
  24
  25 HOSTCFLAGS_usage.o = -I$(srctree_slash)include -Iinclude
  26 HOSTCFLAGS_usage_pod.o = -I$(srctree_slash)include -Iinclude
  27
  28 applets/applets.o: include/usage_compressed.h include/applet_tables.h
  29
  30 applets/applet_tables: .config include/applets.h
  31 applets/usage:         .config include/applets.h
  32 applets/usage_pod:     .config include/applets.h include/applet_tables.h
  33
  34 quiet_cmd_gen_usage_compressed = GEN     include/usage_compressed.h
  35       cmd_gen_usage_compressed = $(srctree_slash)applets/usage_compressed include/usage_compressed.h applets
  36
  37 include/usage_compressed.h: applets/usage $(srctree_slash)applets/usage_compressed
  38         $(call cmd,gen_usage_compressed)
  39
  40 quiet_cmd_gen_applet_tables = GEN     include/applet_tables.h include/NUM_APPLETS.h
  41       cmd_gen_applet_tables = applets/applet_tables include/applet_tables.h include/NUM_APPLETS.h
  42
  43 include/NUM_APPLETS.h: applets/applet_tables
  44         $(call cmd,gen_applet_tables)
  45
  46 # In fact, include/applet_tables.h depends only on applets/applet_tables,
  47 # and is generated by it. But specifying only it can run
  48 # applets/applet_tables twice, possibly in parallel.
  49 # We say that it also needs NUM_APPLETS.h
  50 #
  51 # Unfortunately, we need to list the same command,
  52 # and it can be executed twice (sequentially).
  53 # The alternative is to not list any command,
  54 # and then if include/applet_tables.h is deleted, it won't be rebuilt.
  55 #
  56 include/applet_tables.h: include/NUM_APPLETS.h applets/applet_tables
  57         $(call cmd,gen_applet_tables)