From 35f9c2bdbf03fe567cf1a57ecfe3585e28db2c2e Mon Sep 17 00:00:00 2001
From: Ashley Ruglys <ashley.ruglys@gmail.com>
Date: Tue, 20 Feb 2024 16:06:52 +1300
Subject: [PATCH] ocl-icd: build for windows

---
 pkgs/development/libraries/ocl-icd/default.nix | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/ocl-icd/default.nix b/pkgs/development/libraries/ocl-icd/default.nix
index dfacf433b77f..1b7caf2b9c84 100644
--- a/pkgs/development/libraries/ocl-icd/default.nix
+++ b/pkgs/development/libraries/ocl-icd/default.nix
@@ -5,6 +5,7 @@
 , opencl-headers
 , addOpenGLRunpath
 , autoreconfHook
+, windows
 }:
 
 stdenv.mkDerivation rec {
@@ -23,17 +24,21 @@ stdenv.mkDerivation rec {
     ruby
   ];
 
-  buildInputs = [ opencl-headers ];
+  buildInputs = [ opencl-headers ]
+    ++ lib.optionals stdenv.hostPlatform.isWindows [ windows.dlfcn ];
 
   configureFlags = [
     "--enable-custom-vendordir=/run/opengl-driver/etc/OpenCL/vendors"
   ];
 
+  # fixes: can't build x86_64-w64-mingw32 shared library unless -no-undefined is specified
+  makeFlags = lib.optionals stdenv.hostPlatform.isWindows [ "LDFLAGS=-no-undefined" ];
+
   meta = with lib; {
     description = "OpenCL ICD Loader for ${opencl-headers.name}";
     homepage    = "https://github.com/OCL-dev/ocl-icd";
     license     = licenses.bsd2;
-    platforms = platforms.unix;
+    platforms = platforms.unix ++ platforms.windows;
     maintainers = with maintainers; [ r-burns ];
   };
 }