Linking failure on aarch64

[Hans Åberg]

> On 2 Jul 2020, at 20:53, Torbjörn Granlund <tg at gmplib.org> wrote:
> 
> Hans Åberg <haberg-1 at telia.com> writes:
> 
>  One must run 'xcode-select install' from the Terminal.
> 
> I came that far (except it is --install) before giving up.

Right.

> But --install is not for installing a new Xcode, but for installing
> command line tools.

Yes, but if you have something run by a Makefile, then that would be needed, also when running in the GUI. I had a problem with that when switching Xcode version: Some things would work, others not.

> What version?  It does not say.  

If one does not indicate which one by an argument, then it is probably /Applications/Xcode, or the one set by --switch:

One can set version by the --switch argument; see --help. It should be (as root)
  xcode-select --switch /Applications/Xcode.app/Contents/Developer

> The opened
> "dialogue" is not much of a dialogue as OK and Cancel was the only
> options IIRC.  The command takes no argument (such as an Xcode release
> image) at least not as per its lackluster manual, nor in any way my
> experimentation could find out.
> 
> How to install the (in the manual) mentioned
> /Applications/Xcode-beta.app remains undocumented.

So here it should be
  xcode-select --switch /Applications/Xcode-beta.app/Contents/Developer

>  I may not try the Xcode betas for other reasons, they may corrupt some other installations.
> 
> Perhaps you also failed with your installation, overwriting the existing
> Xcode?

It was not I, but one on the LilyPond list that was not being able to run the lilypond program. I suggested to make a new volume with a new MacOS installation, and he found it worked, and that it was not due to MacPorts. A suggestion on the net suggested that some versions of Xcode 11 beta could cause such issues. See:

https://lists.gnu.org/archive/html/lilypond-user/2020-03/msg00368.html