The release Xcode 8 release notes (no longer beta) don’t have that comment:
But, they do seem to be trying to build for 10.12 instead of 10.11.
> On Sep 21, 2016, at 2:44 PM, Lawrence Velázquez <lar...@macports.org> wrote:
> Jack Howarth has noted on IRC that that Apple will not be releasing
> a Command Line Tools package for Xcode 8 on El Capitan [*].
> There is no Command Line Tools (OS X 10.11) for Xcode
> 8 package. Xcode 8 contains SDKs that are incompatible
> with earlier toolchains. Developers who want to make use
> of the Xcode 8 SDKs from the command line must choose
> the SDK with xcode-select. Developers on OS X El Capitan
> who have installed versions of the Command Line Tools
> (OS X 10.11) for Xcode 8 Beta should install Command
> Line Tools (OS X 10.11) for Xcode 7.3.1. (28234439)
> Do we need to adjust our installation instructions to account for this?
> The consequences of mixing the Xcode 7 CLT with Xcode 8 are not clear to
> me; maybe it's not a problem at all.
> macports-dev mailing list
macports-dev mailing list