Reverts r337612. The issues that cropped up with the last attempt appear to have gone away.
State of them in what sense? Compression is pretty orthogonal to any DWARF version - it's more about the container (ELF, etc) you use. Split DWARF is non-standardly supported in pre-v5, and I think it's functioning in the standards conformant v5 mode too.
Anything having to do with section format and placement ought to be correct at this point. Certainly I see v5 type units coming out in the .debug_info section per spec, and the .dwo files look right. If there's something missing please file a bug and CC me.
There was certainly a release where split-dwarf and type units didn't work yet, but that's all done now.
Ah, thanks for the correction - I thought that was the case, and then I thought I'd tested it a couple of weeks ago and seen it wasn't (when I'd expected it was)... must've messed up my test, maybe used an old compiler build I had lying around.