&gt; PDB was an issue too, but that&#x27;s gotten fixed and now LLVM can output PDB. I can&#x27;t think of much that&#x27;s left...<p>This is what I was referring to.  The RFC from a Microsoft employee on full CodeView (what gets compiled to PDB) support was posted three months ago, but AFAIK the implementation is still in progress.  The preexisting support for CodeView is described by the documentation as &quot;minimal&quot; as it contains only line tables.