warning: [options] bootstrap class path not set in conjunction with -source 1.5
warning: [options] source value 1.5 is obsolete and will be removed in a future release
warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
These are warning messages produced by the Java compiler because you are using a newer version of the JDK to cross-compile against an older target version. You can either suppress the messages, compile with a 1.5 JDK, point the bootstrap classpath at the 1.5 JDK JARs or simply ignore the messages.
https://blogs.oracle.com/darcy/entry/bootclasspath_older_source