mte/unikernel/duniverse/dune_/test/blackbox-tests/test-cases/virtual-libraries/github2896.t
2025-11-11 02:07:51 +01:00

42 lines
1.4 KiB
Perl

Reproduction of the issue in #2896
We have a dependency cycle of the form impl <- lib <- vlib
where vlib is a virtual library, and impl implements this library.
$ echo "(lang dune 2.3)" > dune-project
$ mkdir vlib impl lib
$ touch impl/vlib.ml
$ echo "val run : unit -> unit" > vlib/vlib.mli
$ cat >vlib/dune <<EOF
> (library (name vlib) (virtual_modules vlib))
> EOF
$ echo "let bar () = Vlib.run ();;" > lib/lib.ml
$ cat >lib/dune <<EOF
> (library (name lib) (libraries vlib))
> EOF
$ echo "let run () = Lib.bar ();;" > impl/vlib.ml
$ cat >impl/dune <<EOF
> (library (name impl) (implements vlib) (libraries lib))
> EOF
$ dune build @all
Error: Library "vlib" was pulled in.
-> required by library "lib" in _build/default/lib
-> required by library "impl" in _build/default/impl
-> required by _build/default/impl/.impl.objs/byte/vlib.cmo
-> required by _build/default/impl/impl.cma
-> required by alias impl/all
[1]
The implementation impl was built, but it's not usable:
$ echo 'Vlib.run ()' > foo.ml
$ echo "(executable (name foo) (libraries impl))" > dune
$ dune exec ./foo.exe
Error: Library "vlib" was pulled in.
-> required by library "lib" in _build/default/lib
-> required by library "impl" in _build/default/impl
-> required by executable foo in dune:1
-> required by _build/default/.foo.eobjs/native/dune__exe__Foo.cmx
-> required by _build/default/foo.exe
[1]