Problem

dune has been failing to build from source on pkgsrc because they can't get dune to put the man pages in a different location (share/man/*) from dune's default man/* (https://us-central.manta.mnx.io/pkgsrc/public/reports/upstream-trunk/20240305.1526/ocaml-dune-3.11.1/install.log).

As an experiment, I cloned dune from github to build it the make way. I executed the following sequence, from what I understood through various conversations on the github repo:

$ cd dune/
$ ./configure --mandir=./fake_root/share/man
$ PREFIX=fake_root make release
$ PREFIX=fake_root make install

configure.ml seems to be doing what it is intended to - it creates/modifies src/dune_rules/setup.ml:

let library_path = []

let roots : string option Install.Roots.t =
  { lib_root = None
  ; man = Some "/Users/jb/projects/dune/./fake_root/share/man"
  ; doc_root = None
  ; etc_root = None
  ; share_root = None
  ; bin = None
  ; sbin = None
  ; libexec_root = None
  }

Expected Behavior

man pages should be installed at fake_root/share/man/*.

Actual Behavior

man pages are still installed at man/* instead of share/man/*.

> tree -d fake_root
fake_root
├── bin
├── doc
│   └── dune
│       └── odoc-pages
├── lib
│   └── dune
├── man
│   ├── man1
│   └── man5
└── share
    └── emacs
        └── site-lisp

Reproduction

1. Clone dune repo
2. Execute the following sequence of commands.

$ cd dune/
$ ./configure --mandir=./fake_root/share/man
$ PREFIX=fake_root make release
$ PREFIX=fake_root make install

Specifications

• Version of dune (output of dune --version): main branch
• Version of ocaml (output of ocamlc --version): 4.14.1
• Operating system (distribution and version): macOS Sonoma 14.3 (Silicon aarm64 architecture)