Does not compile with -static

[Chris00]

When compiling ocamlgraph with switch 4.07.1+musl+static+flambda, I get

#=== ERROR while compiling ocamlgraph.1.8.8 ===================================#
# context     2.0.0 | linux/x86_64 | ocaml-variants.4.07.1+musl+static+flambda | https://opam.ocaml.org/#892303df
# path        ~/.opam/4.07.1+musl+static+flambda/.opam-switch/build/ocamlgraph.1.8.8
# command     /usr/bin/make
# exit-code   2
# env-file    ~/.opam/log/ocamlgraph-27696-8b47d2.env
# output-file ~/.opam/log/ocamlgraph-27696-8b47d2.out
### output ###
# [...]
# ocamlopt.opt -c -I src -I lib -for-pack Graph src/merge.ml
# ocamlopt.opt -c -I src -I lib -for-pack Graph src/mincut.ml
# ocamlopt.opt -c -I src -I lib -for-pack Graph src/clique.ml
# ocamlopt.opt -c -I src -I lib -for-pack Graph src/weakTopological.ml
# ocamlopt.opt -c -I src -I lib -for-pack Graph src/chaoticIteration.ml
# ocamlopt.opt -I src -I lib -pack -o graph.cmx src/sig.cmi src/sig_pack.cmi src/dot_ast.cmi lib/unionfind.cmx lib/heap.cmx lib/bitv.cmx lib/persistentQueue.cmx src/version.cmx src/util.cmx src/blocks.cmx src/persistent.cmx src/imperative.cmx src/delaunay.cmx src/builder.cmx src/classic.cmx src/rand.cmx src/oper.cmx src/components.cmx src/path.cmx src/nonnegative.cmx src/traverse.cmx src/colori[...]
# ocamlopt.opt -I src -I lib -a -o graph.cmxa graph.cmx
# ocamlopt.opt -I src -I lib -shared -o graph.cmxs graph.cmx
# sh: 1: shared-libs-not-available: not found
# File "caml_startup", line 1:
# Error: Error during linking
# make: *** [Makefile:104: graph.cmxs] Error 2

Switching to Dune will fix the problem automatically. :-)

[yakobowski]

We strive to keep OCamlGraph compatible with as many versions of OCaml as possible (currently 3.10.2), so a switch to Dune will happen only if we do not "lose" too many versions by doing so. Do you know if Dune imposes some requirements?

[Chris00]

Yes, Dune requires OCaml ≥ 4.02. If you want to maintain compatibility with very old versions of OCaml, you need to detect whether shared libraries are supported by the compiler.

[balsoft]

Is there any known fix for this in the meantime? I'm trying to build ocamlPackages in nixpkgs statically, and this is one of the blockers.