svn commit: [26139] trunk/busybox/applets

[vda at busybox.net]

Author: vda
Date: 2009-04-17 21:56:02 +0000 (Fri, 17 Apr 2009)
New Revision: 26139

Log:
build system: remove some unnecessary rebuilds



Modified:
   trunk/busybox/applets/Kbuild


Changeset:
Modified: trunk/busybox/applets/Kbuild
===================================================================
--- trunk/busybox/applets/Kbuild	2009-04-17 18:54:50 UTC (rev 26138)
+++ trunk/busybox/applets/Kbuild	2009-04-17 21:56:02 UTC (rev 26139)
@@ -13,18 +13,21 @@
 always:= $(hostprogs-y)
 
 # Generated files need additional love
+# NB: __srctree is either empty or "srctree/"
+# using it instead of srctree decreases amount of rebuilds
+# if tree is merely renamed/copied
 
-HOSTCFLAGS_usage.o = -I$(srctree)/include
+HOSTCFLAGS_usage.o = -I$(__srctree)include
 
 applets/applets.o: include/usage_compressed.h include/applet_tables.h
 
-applets/usage:         .config $(srctree)/applets/usage_compressed
+applets/usage:         .config $(__srctree)applets/usage_compressed
 applets/applet_tables: .config
 
 quiet_cmd_gen_usage_compressed = GEN     include/usage_compressed.h
-      cmd_gen_usage_compressed = $(srctree)/applets/usage_compressed include/usage_compressed.h applets
+      cmd_gen_usage_compressed = $(__srctree)applets/usage_compressed include/usage_compressed.h applets
 
-include/usage_compressed.h: applets/usage $(srctree)/applets/usage_compressed
+include/usage_compressed.h: applets/usage $(__srctree)applets/usage_compressed
 	$(call cmd,gen_usage_compressed)
 
 quiet_cmd_gen_applet_tables = GEN     include/applet_tables.h