Re: OS X builds failing with "C compiler cannot create executables"

[Glenn Morris]

Glenn Morris wrote:

> I see some OS X builds have been failing for some weeks in the configure
> step with
>
>   configure: error: C compiler cannot create executables
[...]
> Examining config.log:
>
>   configure:5019: checking for gcc
>   configure:5046: result: clang
>   [...]
>   configure:5315: checking whether the C compiler works
>   configure:5337: clang -O1 conftest.c >&5
>   xcode-select: error: no developer tools were found at
>   '/Applications/Xcode.app', and no install could be requested (perhaps
>   no UI is present), please install manually from 'developer.apple.com'.


Now this is pinging back and forth between working and not working in
successive builds, which is annoying now that the build status emails
are working again (thanks for that BTW).

See eg http://hydra.nixos.org/jobset/gnu/emacs-25
builds 1254993, 1254893, 1254892, 1254786, 1254684