&gt; seriously, CDDL is FSF&#x2F;OSI approved.<p>...as is the GPL, which is also written by the FSF. I&#x27;m not sure what point you&#x27;re trying to make by saying this. Many FSF&#x2F;OSI-approved licenses are not pairwise-compatible with each other. It&#x27;s not limited to either the GPL or the CDDL.<p>&gt;  but the problem is not oracle&#x27;s clearly free software.<p>The problem is as much Oracle as it is Linux. Especially since, as noted in other comments, the CDDL was created <i>specifically to be incompatible</i> with Linux&#x27;s license.<p>&gt; The problem is GPL forcibly does not allow perfectly fine open source licensed software to be distributed in binary form due to it&#x27;s copyleft.<p>This isn&#x27;t an accurate description either of the GPL or of the incompatibility at play here.