From e7038aee97fb7b7d096549e68de17d6307567620 Mon Sep 17 00:00:00 2001
From: jackyliu16 <18922251299@163.com>
Date: Sun, 30 Apr 2023 13:56:13 +0300
Subject: [PATCH 1/2] openblas: Enable loongarch64-linux

  ref:
    https://www.phoronix.com/news/OpenBLAS-0.3.18-Released
    https://github.com/xianyi/OpenBLAS/blob/develop/TargetList.txt
---
 .../libraries/science/math/openblas/default.nix            | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/libraries/science/math/openblas/default.nix b/pkgs/development/libraries/science/math/openblas/default.nix
index 36c412f8de71..257597e5accb 100644
--- a/pkgs/development/libraries/science/math/openblas/default.nix
+++ b/pkgs/development/libraries/science/math/openblas/default.nix
@@ -106,6 +106,13 @@ let
       DYNAMIC_ARCH = setDynamicArch false;
       USE_OPENMP = true;
     };
+
+    loongarch64-linux = {
+      BINARY = 64;
+      TARGET = setTarget "LOONGSONGENERIC";
+      DYNAMIC_ARCH = setDynamicArch false;
+      USE_OPENMP = true;
+    };
   };
 in
 

From c8f1166ce664509384a24b8bb819f92f60406d63 Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Sun, 30 Apr 2023 13:59:15 +0300
Subject: [PATCH 2/2] openblas: fix build on new-world loongarch

---
 .../libraries/science/math/openblas/default.nix       | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/science/math/openblas/default.nix b/pkgs/development/libraries/science/math/openblas/default.nix
index 257597e5accb..950402315a9b 100644
--- a/pkgs/development/libraries/science/math/openblas/default.nix
+++ b/pkgs/development/libraries/science/math/openblas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, perl, which
+{ lib, stdenv, fetchFromGitHub, fetchpatch, perl, which
 # 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).
@@ -152,6 +152,15 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-F6cXPqQai4kA5zrsa8E0Q7dD9zZHlwZ+B16EOGNXoXs=";
   };
 
+  patches = lib.optionals stdenv.hostPlatform.isLoongArch64 [
+    # https://github.com/xianyi/OpenBLAS/pull/3626
+    (fetchpatch {
+      name = "openblas-0.3.21-fix-loong.patch";
+      url = "https://gitweb.gentoo.org/repo/gentoo.git/plain/sci-libs/openblas/files/openblas-0.3.21-fix-loong.patch?id=37ee4c70278eb41181f69e175575b0152b941655";
+      hash = "sha256-iWy11l3wEvzNV08LbhOjnSPj1SjPH8RMnb3ORz7V+gc";
+    })
+  ];
+
   postPatch = ''
     # cc1: error: invalid feature modifier 'sve2' in '-march=armv8.5-a+sve+sve2+bf16'
     substituteInPlace Makefile.arm64 --replace "+sve2+bf16" ""