pkgconf: unknown option -- personality

[olafhering]

It seems not all variants of pkgconf recognize the --personality option. At least pkgconf-1.4.2-1.el8 fails.

And indeed it was added just with c46868294fb09d34fa4a459449cb6688364880fb in pkgconf-1.5.1~16.

Can dune be smarter and handle both?

[anmonteiro]

pkg-conf 1.5.1 seems to be 6 years old, released in the first half of 2018 -- is there a reason why you can't upgrade?

[olafhering]

This is the version provided when one builds for CentOS_8 or RHEL_8 in Archiving:unison:buildrequires. Other build targets in ocaml-lablgtk3 have a slightly newer pkgconf, which just segfaults.

I do not know if paying RHEL customers meanwhile got a fixed pkgconf, and therefore will be unaffected by this bug.

I'm not clear why an apparent cross-compiling feature is used when the underlying OCaml compiler is not a cross-compiler. Assume the new feature is well-designed, given the above-average of smartness in this project. I probably need to stick with an older version of dune for the time being for this unison project.