[lower bounds] present library is missing?

[mseri]

Error is:

#=== ERROR while compiling mirage-crypto-pk.0.8.0 =============================#
# context              2.1.0 | linux/x86_64 | ocaml-base-compiler.4.11.2 | file:///home/opam/opam-repository
# path                 ~/.opam/4.11/.opam-switch/build/mirage-crypto-pk.0.8.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build dune build -p mirage-crypto-pk -j 31
# exit-code            1
# env-file             ~/.opam/log/mirage-crypto-pk-23-2c7e1c.env
# output-file          ~/.opam/log/mirage-crypto-pk-23-2c7e1c.out
### output ###
# File "/home/opam/.opam/4.11/lib/ocaml-compiler-libs/bytecomp/ocaml-compiler-libs.bytecomp.dune", line 1, characters 0-0:
# Warning: .dune files are ignored since 2.0. Reinstall the library with dune
# >= 2.0 to get rid of this warning and enable support for the subsystem this
# library provides.
# File "/home/opam/.opam/4.11/lib/ocaml-compiler-libs/common/ocaml-compiler-libs.common.dune", line 1, characters 0-0:
# Warning: .dune files are ignored since 2.0. Reinstall the library with dune
# >= 2.0 to get rid of this warning and enable support for the subsystem this
# library provides.
# File "/home/opam/.opam/4.11/lib/ocaml-compiler-libs/shadow/ocaml-compiler-libs.shadow.dune", line 1, characters 0-0:
# Warning: .dune files are ignored since 2.0. Reinstall the library with dune
# >= 2.0 to get rid of this warning and enable support for the subsystem this
# library provides.
# File "/home/opam/.opam/4.11/lib/ocaml-compiler-libs/toplevel/ocaml-compiler-libs.toplevel.dune", line 1, characters 0-0:
# Warning: .dune files are ignored since 2.0. Reinstall the library with dune
# >= 2.0 to get rid of this warning and enable support for the subsystem this
# library provides.
# File "/home/opam/.opam/4.11/lib/ppx_derivers/ppx_derivers.dune", line 1, characters 0-0:
# Warning: .dune files are ignored since 2.0. Reinstall the library with dune
# >= 2.0 to get rid of this warning and enable support for the subsystem this
# library provides.
# File "pk/dune", line 4, characters 68-80:
# 4 |   (libraries cstruct zarith mirage-crypto mirage-crypto-rng sexplib eqaf.cstruct rresult)
#                                                                         ^^^^^^^^^^^^
# Error: Library "eqaf.cstruct" not found.
# Hint: try: dune external-lib-deps --missing -p mirage-crypto-pk -j 31 @install

From https://opam.ci.ocaml.org/github/ocaml/opam-repository/commit/097ecf872ed3bdfacf1b07d3bf58a8a349693cdd/variant/opam-2.1,compilers,4.11,conduit-mirage.4.0.0,lower-bounds

However the installed version of eqaf (0.7.0) provides the eqaf.cstruct library

[mseri]

Seen on #19716

[kit-ty-kate]

This is due to the fact that eqaf < 0.8 provides eqaf.cstruct and eqaf.bigstring as optional libraries and bigstring-compat (required for eqaf.cstruct through eqaf.bigstring) isn't installed.

[mseri]

Thanks! Indeed, this was just fixed by #19803