From b39504da7265060a9bfa7b21d2e9acffc49559c7 Mon Sep 17 00:00:00 2001
From: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Date: Sat, 27 Nov 2021 22:11:09 -0500
Subject: [PATCH] mxnet: fix for gcc10+, enable on darwin

---
 .../science/math/mxnet/default.nix            | 26 +++++++++++++++----
 pkgs/top-level/all-packages.nix               |  1 -
 2 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/pkgs/applications/science/math/mxnet/default.nix b/pkgs/applications/science/math/mxnet/default.nix
index ab360a963852..2e9c95d06cbd 100644
--- a/pkgs/applications/science/math/mxnet/default.nix
+++ b/pkgs/applications/science/math/mxnet/default.nix
@@ -1,5 +1,5 @@
-{ config, stdenv, lib, fetchurl, bash, cmake
-, opencv3, gtest, blas, perl
+{ config, stdenv, lib, fetchurl, fetchpatch, bash, cmake
+, opencv3, gtest, blas, gomp, llvmPackages, perl
 , cudaSupport ? config.cudaSupport or false, cudatoolkit, nvidia_x11
 , cudnnSupport ? cudaSupport, cudnn
 }:
@@ -15,11 +15,27 @@ stdenv.mkDerivation rec {
     sha256 = "1vvdb7pfh63kb9fzs6gqp95q550a3ck4cj9mqxlk9wwhkh30dsq1";
   };
 
+  patches = [
+    # Fix build error https://github.com/apache/incubator-mxnet/issues/19405
+    (fetchpatch {
+      name = "mxnet-fix-gcc-linker-error-1.patch";
+      url = "https://github.com/apache/incubator-mxnet/commit/78e31d66d19e385ca4ef73245ce79a47e375d8d1.diff";
+      sha256 = "sha256-UfmGhh4RbvrEOXe6IJxHm1Aqpy1gS6gHxrX5KQBXjv4=";
+    })
+    (fetchpatch {
+      name = "mxnet-fix-gcc-linker-error-2.patch";
+      url = "https://github.com/apache/incubator-mxnet/commit/9bfe3116aabd01049fdbd90855cb245a30b795df.diff";
+      sha256 = "sha256-BL7Zf7Bgn0qpai9HbQ6LBxZNa3iLjVJSe5nxZgqI/fw=";
+    })
+  ];
+
   nativeBuildInputs = [ cmake perl ];
 
   buildInputs = [ opencv3 gtest blas.provider ]
-              ++ lib.optionals cudaSupport [ cudatoolkit nvidia_x11 ]
-              ++ lib.optional cudnnSupport cudnn;
+    ++ lib.optional stdenv.cc.isGNU gomp
+    ++ lib.optional stdenv.cc.isClang llvmPackages.openmp
+    ++ lib.optionals cudaSupport [ cudatoolkit nvidia_x11 ]
+    ++ lib.optional cudnnSupport cudnn;
 
   cmakeFlags =
     [ "-DUSE_MKL_IF_AVAILABLE=OFF" ]
@@ -48,6 +64,6 @@ stdenv.mkDerivation rec {
     homepage = "https://mxnet.incubator.apache.org/";
     maintainers = with maintainers; [ abbradar ];
     license = licenses.asl20;
-    platforms = platforms.linux;
+    platforms = platforms.unix;
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dc5728ac01ed..410c511ae995 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -31870,7 +31870,6 @@ with pkgs;
 
   mxnet = callPackage ../applications/science/math/mxnet {
     inherit (linuxPackages) nvidia_x11;
-    stdenv = gcc9Stdenv;
   };
 
   wxmaxima = callPackage ../applications/science/math/wxmaxima { wxGTK = wxGTK30; };