LLVM not supported on Sierra?

[Ryan Schmidt]

On Oct 2, 2016, at 22:05, Dave Horsfall wrote:
> 
> Doing a "port upgraded outdated" after installing Sierra (and had some 
> trouble with X11), I get this:
> 
> --->  Computing dependencies for llvm-3.5
> --->  Fetching distfiles for llvm-3.5
> Error: llvm-3.5 is not supported on macOS Sierra or newer.
> 

llvm-3.5 is not supported on Sierra but llvm-3.8 is. 

The usual instructions for upgrading to a new major OS version (see the Migration wiki page) call for uninstalling all ports and reinstalling what you need. If you do that, you won't be upgrading ports and you won't run into this. 

Since llvm-3.5 is not supported on Sierra, uninstall it. If anything you've installed depends on it, MacPorts will tell you, and then for each of those ports, you can investigate whether they need a different variant selected, or other changes, to support newer llvm.