Sun managed it with Solaris (before Oracle undid that work) - indeed they had to create a license which didn't cause problems with the third party components (the CDDL).
The license happened less about third party components (GPLv2 would have worked for that, too, even if it's less understood area), but because GPLv3 was late, Sun wanted patent clause in license, and AFAIK engineers rebelled against licensing that would have prevented BSDs (or other) from using the code.
(For those who still believe "CDDL was designed to be incompatible with GPL", the same issues show up when trying to mix GPLv2 and GPLv3 code if you can't relicense the former to v3)
