Pete - 2014-05-04

Ant reports the following:

compile:
    [javac] Compiling 3 source files to C:\Program_Files\ArtOfIllusion\ViewAssistant\build
    [javac] warning: [options] bootstrap class path not set in conjunction with -source 1.5
    [javac] 1 warning

What does that mean? I suppose the warning is nothing to be expected to become fatal, but what would be the fix?