Warning in configure on OS X 10.13

[vicuna]

Original bug ID: 7639
Reporter: @johnwhitington
Assigned to: @mshinwell
Status: resolved (set by @mshinwell on 2017-09-26T15:27:37Z)
Resolution: duplicate
Priority: normal
Severity: minor
Category: configure and build/install

Bug description

We get:

[WARNING] Something went wrong during alignment determination for
64-bit integers. I'm going to assume this architecture has
alignment constraints. That's a safe bet: OCaml will work
even if this architecture has actually no alignment
constraints. echo #define ARCH_ALIGN_INT64

This is new with 10.13. Or, at least, I've not seen it before. I am using trunk.

[vicuna]

Comment author: @mshinwell

I will look at this

[vicuna]

Comment author: @mshinwell

I couldn't reproduce this on 4.04, 4.05, 4.06 or trunk on a 10.13 system. Do you have something unusual in your PATH?

[vicuna]

Comment author: @johnwhitington

$ echo $PATH
/Users/john/.opam/4.05.0/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/opt/X11/bin

Is there a way to get more debug output?

edit: I installed the latest xcode command line tools this morning with xcode-select install, since that was required to get back up and running after upgrading the OS.

[vicuna]

Comment author: @johnwhitington

It occurs also when building 4.05.0. So it doesn't look like an OCaml change.

[vicuna]

Comment author: @mshinwell

Indeed it only happens once XCode has been installed. Investigating.

[vicuna]

Comment author: @mshinwell

Superceded by #1371