From f4914d4eb4e966d7dbb66f903de391fc921b5349 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Th=C3=A9o=20Zimmermann?=
 <theo.zimmermann@univ-paris-diderot.fr>
Date: Sun, 22 Oct 2017 19:49:16 +0200
Subject: [PATCH] bignums: init at various versions

Bignums used to be part of the standard library of Coq.
We provide a version for Coq 8.6, and one for Coq 8.7.
---
 .../coq-modules/bignums/default.nix           | 38 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 pkgs/development/coq-modules/bignums/default.nix

diff --git a/pkgs/development/coq-modules/bignums/default.nix b/pkgs/development/coq-modules/bignums/default.nix
new file mode 100644
index 000000000000..5762da66fedd
--- /dev/null
+++ b/pkgs/development/coq-modules/bignums/default.nix
@@ -0,0 +1,38 @@
+{ stdenv, fetchFromGitHub, coq }:
+
+let rev_and_sha = {
+  "8.6" = {
+    rev = "v8.6.0";
+    sha256 = "0553pcsy21cyhmns6k9qggzb67az8kl31d0lwlnz08bsqswigzrj";
+  };
+  "8.7" = {
+    rev = "V8.7.0";
+    sha256 = "11c4sdmpd3l6jjl4v6k213z9fhrmmm1xnly3zmzam1wrrdif4ghl";
+  };
+};
+in
+
+if ! (rev_and_sha ? "${coq.coq-version}") then
+  throw "bignums is not available for Coq ${coq.coq-version}"
+else with rev_and_sha."${coq.coq-version}";
+
+stdenv.mkDerivation rec {
+
+  name = "coq${coq.coq-version}-bignums";
+
+  src = fetchFromGitHub {
+    owner = "coq";
+    repo = "bignums";
+    inherit rev sha256;
+  };
+
+  buildInputs = [ coq.ocaml coq.camlp5 coq.findlib coq ];
+
+  installFlags = "COQLIB=$(out)/lib/coq/${coq.coq-version}/";
+
+  meta = with stdenv.lib; {
+    license = licenses.lgpl2;
+    platforms = coq.meta.platforms;
+  };
+
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9226e15d63c5..3eb87bd64f18 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18630,6 +18630,7 @@ with pkgs;
     coqPackages = self;
 
     autosubst = callPackage ../development/coq-modules/autosubst {};
+    bignums = callPackage ../development/coq-modules/bignums {};
     coq-ext-lib = callPackage ../development/coq-modules/coq-ext-lib {};
     coquelicot = callPackage ../development/coq-modules/coquelicot {};
     dpdgraph = callPackage ../development/coq-modules/dpdgraph {};