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-rw-r--r--include/depends.mk28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/depends.mk b/include/depends.mk
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index 0000000000..b74e535506
--- /dev/null
+++ b/include/depends.mk
@@ -0,0 +1,28 @@
+#
+# Copyright (C) 2007 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+# define a dependency on a subtree
+# parameters:
+# 1: directory
+# 2: directory dependency
+# 3: tempfile for file listings
+# 4: find options
+
+FINDPARAMS := -type f -not -name ".*" -and -not -path "*.svn*"
+define rdep
+ $(foreach file,$(shell find $(1) $(FINDPARAMS) -and -not -path "*:*" $(4)),
+ $(2): $(file)
+ $(file): ;
+ )
+
+ ifneq ($(shell find $(1) $(FINDPARAMS) $(4) 2>/dev/null | md5s),$(shell cat $(3) 2>/dev/null))
+ $(2): $(3)
+ endif
+
+ $(3): FORCE
+ @find $(1) $(FINDPARAMS) $(4) 2>/dev/null | md5s > $$@
+
+endef