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compcert 2.3.2 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
conf-gmp            4           Virtual package relying on a GMP lib system installation
coq                 8.13.1      Formal proof management system
num                 1.4         The legacy Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.09.1      The OCaml compiler (virtual package)
ocaml-base-compiler 4.09.1      Official release 4.09.1
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.3       A library manager for OCaml
zarith              1.12        Implements arithmetic and logical operations over arbitrary-precision integers
# opam file:
opam-version: "2.0"
maintainer: "dev@clarus.me"
homepage: "http://compcert.inria.fr/"
dev-repo: "git+https://github.com/AbsInt/CompCert.git"
bug-reports: "https://github.com/AbsInt/CompCert/issues"
license: "INRIA Non-Commercial License Agreement"
build: [
  ["./configure" "ia32-linux"]
  [make "-j%{jobs}%"]
]
depends: [
  "ocaml"
  "coq" {>= "8.4pl4" & < "8.5~"}
  "menhir" {>= "20140422"}
]
synopsis: "The CompCert C compiler"
authors: "Xavier Leroy <xavier.leroy@inria.fr>"
extra-files: ["coq-compcert.install" "md5=a7efe759bff32c6aac2c2ca483d5a266"]
url {
  src: "http://compcert.inria.fr/release/compcert-2.3pl2.tgz"
  checksum: "md5=f97700e91163e6fbdb645721e2c1350f"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-compcert.2.3.2 coq.8.13.1

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.13.1).
The following dependencies couldn't be met:
  - coq-compcert -> coq < 8.5~ -> ocaml < 4.03.0
      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-compcert.2.3.2
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