A new SIP implementation used by linphone. Reproducible: Always
Created attachment 386454 [details] belle-sip-1.3.0.ebuild
Created attachment 386456 [details, diff] belle-sip-1.3.0-gccpragma.patch
The README says it depends on antlr-3.2 or 3.4. I have tested with the ebuild from bug #293305 which is for antlr-3.3 and it seems to work fine.