Flexdll error on dune 3.8

Ecosystem
,
1

Hello all, I am trying to upgrade dune to 3.8.0, but I keep getting a flexlink/flexdll error.

[ERROR] The compilation of ocaml-variants.5.2.1+options failed at "./configure --prefix=/home/kali/.opam/br-2025-02-26
        --docdir=/home/kali/.opam/br-2025-02-26/doc/ocaml -C --enable-flambda --enable-frame-pointers --disable-warn-error".

#=== ERROR while compiling ocaml-variants.5.2.1+options =======================#
# context     2.3.0 | linux/x86_64 |  | https://opam.ocaml.org#a8a89f62d8abd2a9f0cbb04826bfec1ef6b563e7
# path        ~/.opam/br-2025-02-26/.opam-switch/build/ocaml-variants.5.2.1+options
# command     ~/.opam/opam-init/hooks/sandbox.sh build ./configure --prefix=/home/kali/.opam/br-2025-02-26 --docdir=/home/kali/.opam/br-2025-02-26/doc/ocaml -C --enable-flambda --enable-frame-pointers --disable-warn-error
# exit-code   1
# env-file    ~/.opam/log/ocaml-variants-26799-6bd3a5.env
# output-file ~/.opam/log/ocaml-variants-26799-6bd3a5.out
### output ###
# [...]
# checking whether stripping libraries is possible... yes
# checking if libtool supports shared libraries... yes
# checking whether to build shared libraries... yes
# checking whether to build static libraries... yes
# checking how to run the C preprocessor... gcc -E
# checking C compiler vendor... gcc-11-4
# checking whether host executables can be run in the build... yes
# checking whether #! works in shell scripts... yes
# checking whether C compiler accepts -Wold-style-declaration... yes
# checking for flexdll sources... checking for flexlink... flexlink
# checking whether flexlink works... no
# configure: error: flexlink does not work

However, I do have flexlink installed

$ flexlink
Please specify an output file (-help to get some usage information)

Any help is appreciated, thanks in advance.

2

Something appears to be wrong with your environment; flexlink is only useful on Windows and you seem to be running Linux…

Cheers,
Nicolas

3

Also, any reason you want Dune 3.8? The latest version is 3.17 and 3.18 will be released soon.

Cheers,
Nicolas

4

I’m running WSL 2, apologies for forgetting to mention that! Is OCaml getting confused thinking I’m running in Windows?

Also yes, I do specifically need version 3.8.

5

Do you have flexlink in your PATH? If yes, you must remove it, otherwise the OCaml configure script will try to use it.

Cheers,
Nicolas

6

Yes, removing it fixed the problem, thank you!