From 6359cfdd137e91d9422843bbfc2647f3edcae51d Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@fysik.su.se>
Date: Wed, 9 Feb 2022 18:00:44 +0100
Subject: [PATCH] elpa: enable optional ILP64 support

---
 pkgs/development/libraries/elpa/default.nix | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/libraries/elpa/default.nix b/pkgs/development/libraries/elpa/default.nix
index 3bb59ce9ca6a..76152996a1d0 100644
--- a/pkgs/development/libraries/elpa/default.nix
+++ b/pkgs/development/libraries/elpa/default.nix
@@ -13,13 +13,15 @@
 , cudatoolkit
 } :
 
-# The standard Scalapack has no iLP64 interface
-assert (!blas.isILP64) && (!lapack.isILP64);
+assert blas.isILP64 == lapack.isILP64;
+assert blas.isILP64 == scalapack.isILP64;
 
 stdenv.mkDerivation rec {
   pname = "elpa";
   version = "2021.11.001";
 
+  passthru = { inherit (blas) isILP64; };
+
   src = fetchurl {
     url = "https://elpa.mpcdf.mpg.de/software/tarball-archive/Releases/${version}/elpa-${version}.tar.gz";
     sha256 = "0bw0nwzwvjfmijfwznmrghypd3q237a3h5g5fcdncilrqnk1sdpv";
@@ -60,7 +62,8 @@ stdenv.mkDerivation rec {
     "--with-mpi"
     "--enable-openmp"
     "--without-threading-support-check-during-build"
-  ] ++ lib.optional (!avxSupport) "--disable-avx"
+  ] ++ lib.optional blas.isILP64 "--enable-64bit-integer-math-support"
+    ++ lib.optional (!avxSupport) "--disable-avx"
     ++ lib.optional (!avx2Support) "--disable-avx2"
     ++ lib.optional (!avx512Support) "--disable-avx512"
     ++ lib.optional (!stdenv.hostPlatform.isx86_64) "--disable-sse"