From 2396201a35276b40cacce65fbf683bec748f162d Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@fysik.su.se>
Date: Thu, 3 Nov 2022 11:46:00 +0100
Subject: [PATCH 1/5] arpack: add optional MPI support

---
 .../libraries/science/math/arpack/default.nix     | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 9d96368a4cda..a1152598aa62 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -1,5 +1,13 @@
 { lib, stdenv, fetchFromGitHub, fetchpatch, cmake
-, gfortran, blas, lapack, eigen }:
+, gfortran, blas, lapack, eigen
+, useMpi ? false
+, mpi
+, openssh
+}:
+
+# MPI version can only be built with LP64 interface.
+# See https://github.com/opencollab/arpack-ng#readme
+assert useMpi -> !blas.isILP64;
 
 stdenv.mkDerivation rec {
   pname = "arpack";
@@ -27,13 +35,16 @@ stdenv.mkDerivation rec {
     blas
     lapack
     eigen
-  ];
+  ] ++ lib.optional useMpi mpi;
+
+  checkInputs = lib.optional useMpi openssh;
 
   doCheck = true;
 
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"
     "-DINTERFACE64=${if blas.isILP64 then "1" else "0"}"
+    "-DMPI=${if useMpi then "ON" else "OFF"}"
   ];
 
   preCheck = ''

From df19353be30798911efe0189a3dd478e62ee74b0 Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@fysik.su.se>
Date: Thu, 3 Nov 2022 12:29:50 +0100
Subject: [PATCH 2/5] arpack: propagate isILP64 flag from BLAS

---
 pkgs/development/libraries/science/math/arpack/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index a1152598aa62..bdb386b9fe5c 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -56,6 +56,8 @@ stdenv.mkDerivation rec {
     install_name_tool -change libblas.dylib ${blas}/lib/libblas.dylib $out/lib/libarpack.dylib
   '';
 
+  passthru = { inherit (blas) isILP64; };
+
   meta = {
     homepage = "https://github.com/opencollab/arpack-ng";
     description = ''

From b931e2bb82cd268991cdd062e9c689981a9cb9cd Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@fysik.su.se>
Date: Thu, 3 Nov 2022 12:50:08 +0100
Subject: [PATCH 3/5] octopus: add arpack ILP64 check

---
 pkgs/applications/science/chemistry/octopus/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/applications/science/chemistry/octopus/default.nix b/pkgs/applications/science/chemistry/octopus/default.nix
index 8a97dc5f0c33..d0058c8650d8 100644
--- a/pkgs/applications/science/chemistry/octopus/default.nix
+++ b/pkgs/applications/science/chemistry/octopus/default.nix
@@ -8,6 +8,7 @@
 }:
 
 assert (!blas.isILP64) && (!lapack.isILP64);
+assert (blas.isILP64 == arpack.isILP64);
 
 stdenv.mkDerivation rec {
   pname = "octopus";

From 8c3d2bab83369227d810f9fd49be36765e2b8b2c Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@fysik.su.se>
Date: Thu, 3 Nov 2022 12:50:25 +0100
Subject: [PATCH 4/5] calculix: add blas, lapack, arpack ILP64 checks

---
 pkgs/applications/science/math/calculix/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/applications/science/math/calculix/default.nix b/pkgs/applications/science/math/calculix/default.nix
index df943277a627..4b0ae6f8ac9d 100644
--- a/pkgs/applications/science/math/calculix/default.nix
+++ b/pkgs/applications/science/math/calculix/default.nix
@@ -1,5 +1,9 @@
 { lib, stdenv, fetchurl, gfortran, arpack, spooles, blas, lapack }:
 
+assert (blas.isILP64 == lapack.isILP64 &&
+        blas.isILP64 == arpack.isILP64 &&
+        !blas.isILP64);
+
 stdenv.mkDerivation rec {
   pname = "calculix";
   version = "2.19";

From 09a60c860b16b83649c4970149504d8db4cd737b Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@fysik.su.se>
Date: Thu, 3 Nov 2022 12:54:12 +0100
Subject: [PATCH 5/5] igraph: add blas, lapack, arpack ILP64 checks

---
 pkgs/development/libraries/igraph/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/libraries/igraph/default.nix b/pkgs/development/libraries/igraph/default.nix
index 69778f034829..9381f1b9ea30 100644
--- a/pkgs/development/libraries/igraph/default.nix
+++ b/pkgs/development/libraries/igraph/default.nix
@@ -21,6 +21,10 @@
 , xmlto
 }:
 
+assert (blas.isILP64 == lapack.isILP64 &&
+        blas.isILP64 == arpack.isILP64 &&
+        !blas.isILP64);
+
 stdenv.mkDerivation rec {
   pname = "igraph";
   version = "0.9.10";