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+# Added `if_found` to subdir
+
+Added a new keyword argument to the `subdir` command. It is given a
+list of dependency objects and the function will only recurse in the
+subdirectory if they are all found. Typical usage goes like this.
+
+    d1 = dependency('foo') # This is found
+    d2 = dependency('bar') # This is not found
+
+    subdir('somedir', if_found : [d1, d2])
+
+In this case the subdirectory would not be entered since `d2` could
+not be found.