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coqffi 1.0.0~beta2 Not compatible 👼

Context

# Packages matching: installed
# Name              # Installed # Synopsis
base-bigarray       base
base-threads        base
base-unix           base
conf-findutils      1           Virtual package relying on findutils
coq                 8.12.2      Formal proof management system
num                 1.4         The legacy Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.07.1      The OCaml compiler (virtual package)
ocaml-base-compiler 4.07.1      Official release 4.07.1
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.3       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "thomas.letan@ssi.gouv.fr"
homepage: "https://github.com/coq-community/coqffi"
dev-repo: "git+https://github.com/coq-community/coqffi.git"
bug-reports: "https://github.com/coq-community/coqffi/issues"
license: "MIT"
synopsis: "Tool for generating Coq FFI bindings to OCaml libraries"
description: """
`coqffi` generates the necessary Coq boilerplate to use OCaml functions in a
Coq development, and configures the Coq extraction mechanism accordingly."""
build: [
  ["./src-prepare.sh"]
  ["dune" "build" "-p" name "-j" jobs]
]
depends: [
  "ocaml" {>= "4.08" & < "4.12~" }
  "dune" {>= "2.5"}
  "coq" {(>= "8.12" & < "8.13~") | (= "dev")}
  "cmdliner" {>= "1.0.4"}
]
tags: [
  "category:Miscellaneous/Coq Extensions"
  "keyword:foreign function interface"
  "keyword:extraction"
  "keyword:OCaml"
  "logpath:CoqFFI"
]
authors: [
  "Thomas Letan"
  "Li-yao Xia"
  "Yann Régis-Gianas"
  "Yannick Zakowski"
]
url {
  src: "https://github.com/coq-community/coqffi/archive/1.0.0-beta2.tar.gz"
  checksum: "sha512=e1190d40bb163cc075d30c29d910b71b03c805f806ed9da2e6047de4b83da95cb6fc6622395d30c2920a17ef2df7cc2933f3702ee603681e908122d6eac18f8f"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-coqffi.1.0.0~beta2 coq.8.12.2

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.12.2).
The following dependencies couldn't be met:
  - coq-coqffi -> ocaml >= 4.08
      base of this switch (use `--unlock-base' to force)
No solution found, exiting

Dry install without Coq/switch base, to test if the problem was incompatibility with the current Coq/OCaml version:

Command: opam remove -y coq; opam install -y --show-action --unlock-base coq-coqffi.1.0.0~beta2
Return code: 0

Install dependencies

Command: true
Return code: 0
Duration: 0 s

Install 🚀

Command: true
Return code: 0
Duration: 0 s

Installation size

No files were installed.

Uninstall 🧹

Command: true
Return code: 0
Missing removes: none
Wrong removes: none