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mod-red 8.10.0 Not compatible 👼

Context

# Packages matching: installed
# Name              # Installed # Synopsis
base-bigarray       base
base-num            base        Num library distributed with the OCaml compiler
base-threads        base
base-unix           base
camlp5              7.14        Preprocessor-pretty-printer of OCaml
conf-findutils      1           Virtual package relying on findutils
conf-perl           2           Virtual package relying on perl
coq                 8.5.0       Formal proof management system
num                 0           The Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.03.0      The OCaml compiler (virtual package)
ocaml-base-compiler 4.03.0      Official 4.03.0 release
ocaml-config        1           OCaml Switch Configuration
# opam file:
opam-version: "2.0"
maintainer: "Hugo.Herbelin@inria.fr"
homepage: "https://github.com/coq-contribs/mod-red"
license: "GNU Lesser General Public License"
build: [make "-j%{jobs}%"]
install: [make "install"]
remove: ["rm" "-R" "%{lib}%/coq/user-contrib/ModRed"]
depends: [
  "ocaml"
  "coq" {>= "8.10" & < "8.11~"}
]
tags: [
  "keyword: Algorithms"
  "keyword: Performance"
  "keyword: Computer Arithmetic"
  "keyword: Modular Reduction"
  "keyword: Optimization"
  "category: Mathematics/Arithmetic and Number Theory/Miscellaneous"
  "date: 2007-12; Updated in April 2009"
]
authors: [
  "Luc Rutten"
]
bug-reports: "https://github.com/coq-contribs/mod-red/issues"
dev-repo: "git+https://github.com/coq-contribs/mod-red.git"
synopsis: "Efficient Reduction of Large Integers by Small Moduli"
description: """
Fast reduction of integers by moduli up to 2^(w-1), where w is a processor's word size."""
flags: light-uninstall
url {
  src: "https://github.com/coq-contribs/mod-red/archive/v8.10.0.tar.gz"
  checksum: "md5=e7332e02c56007917358870e4a9e7718"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-mod-red.8.10.0 coq.8.5.0

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.5.0).
The following dependencies couldn't be met:
  - coq-mod-red -> coq >= 8.10 -> ocaml >= 4.05.0
      base of this switch (use `--unlock-base' to force)
  - coq-mod-red -> coq >= 8.10 -> coq-core -> ocaml >= 4.09.0
      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-mod-red.8.10.0
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