This fixes out-of-tree builds, like "make distcheck" does.
org/collectd/java/GenericJMX.java \
org/collectd/java/JMXMemory.java
org/collectd/java/GenericJMX.java \
org/collectd/java/JMXMemory.java
-java-build-stamp: org/collectd/api/*.java org/collectd/java/*.java
+java-build-stamp: $(srcdir)/org/collectd/api/*.java $(srcdir)/org/collectd/java/*.java
$(JAVAC) -d "." "$(srcdir)/org/collectd/api"/*.java
$(JAVAC) -d "." "$(srcdir)/org/collectd/java"/*.java
mkdir -p .libs
$(JAVAC) -d "." "$(srcdir)/org/collectd/api"/*.java
$(JAVAC) -d "." "$(srcdir)/org/collectd/java"/*.java
mkdir -p .libs