From d2f0fc1f414290b399301f284329b791c010ee85 Mon Sep 17 00:00:00 2001
From: Timo Kaufmann <timokau@zoho.com>
Date: Mon, 9 Jul 2018 00:01:03 +0200
Subject: [PATCH] openblas: backport fix

https://github.com/xianyi/OpenBLAS/issues/1666

Causing test failures in cvxopt and (according to an openblas issue) numpy.
---
 .../science/math/openblas/default.nix         | 20 +++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/pkgs/development/libraries/science/math/openblas/default.nix b/pkgs/development/libraries/science/math/openblas/default.nix
index fc8f11f2f11e..4630dc1b8ddb 100644
--- a/pkgs/development/libraries/science/math/openblas/default.nix
+++ b/pkgs/development/libraries/science/math/openblas/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, gfortran, perl, which, config, coreutils
+{ stdenv, fetchFromGitHub, fetchpatch, gfortran, perl, which, config, coreutils
 # Most packages depending on openblas expect integer width to match
 # pointer width, but some expect to use 32-bit integers always
 # (for compatibility with reference BLAS).
@@ -80,10 +80,11 @@ in
 stdenv.mkDerivation rec {
   name = "openblas-${version}";
   version = "0.3.1";
-  src = fetchurl {
-    url = "https://github.com/xianyi/OpenBLAS/archive/v${version}.tar.gz";
-    sha256 = "0czbs2afmcxxij1ivqrm04p0qcksg5fravjifhydvb7k6mpraphz";
-    name = "openblas-${version}.tar.gz";
+  src = fetchFromGitHub {
+    owner = "xianyi";
+    repo = "OpenBLAS";
+    rev = "v${version}";
+    sha256 = "1dkwp4gz1hzpmhzks9y9ipb4c5h0r6c7yff62x3s8x9z6f8knaqc";
   };
 
   inherit blas64;
@@ -117,7 +118,14 @@ stdenv.mkDerivation rec {
     ] ++ stdenv.lib.optional (stdenv.hostPlatform.libc == "musl") "NO_AFFINITY=1"
     ++ mapAttrsToList (var: val: var + "=" + val) config;
 
-  patches = []; # TODO: Remove on next mass-rebuild
+    patches = [
+      # Backport of https://github.com/xianyi/OpenBLAS/pull/1667, which
+      # is causing problems and was already accepted upstream.
+      (fetchpatch {
+        url = "https://github.com/xianyi/OpenBLAS/commit/5f2a3c05cd0e3872be3c5686b9da6b627658eeb7.patch";
+        sha256 = "1qvxhk92likrshw6z6hjqxvkblwzgsbzis2b2f71bsvx9174qfk1";
+      })
+    ];
 
   doCheck = true;
   checkTarget = "tests";