Add patch to create versioned DLL on Windows.

Downstream packages newly built against this package will now search for
the versioned DLL at runtime, eliminating an issue where non-conda
OpenCL.dll (e.g. NVIDIA's own ICD loader) would interfere with the
conda-packaged DLL because it has a higher priority on the PATH.

recipe/0001-Create-versioned-DLL-on-Windows-OpenCL-1.dll-instead.patch

@@ -0,0 +1,26 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Ryan Volz <[email protected]>
+Date: Fri, 21 Apr 2023 11:52:29 -0400
+Subject: [PATCH] Create versioned DLL on Windows, OpenCL-1.dll instead of
+ OpenCL.dll.
+
+---
+ CMakeLists.txt | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 567ceee..c834205 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -124,6 +124,8 @@ set_target_properties (OpenCL PROPERTIES VERSION "1.2" SOVERSION "1")
+ if (WIN32)
+     target_link_libraries (OpenCL PRIVATE cfgmgr32.lib runtimeobject.lib)
+
++    set_target_properties (OpenCL PROPERTIES RUNTIME_OUTPUT_NAME "OpenCL-${PROJECT_VERSION_MAJOR}")
++
+     # Generate a DLL without a "lib" prefix for mingw.
+     if (MINGW OR MSYS OR CYGWIN)
+         set_target_properties(OpenCL PROPERTIES PREFIX "")
+-- 
+2.40.0
+

recipe/meta.yaml

@@ -9,6 +9,7 @@ source:
     sha256: 53d33bf629f145e7fded56d7fd9dde3aa85f9e0573171d777464e092f04bbf31
     patches:
       - no_check_integrity_win.patch
+      - 0001-Create-versioned-DLL-on-Windows-OpenCL-1.dll-instead.patch
 
   - url: https://github.com/KhronosGroup/OpenCL-Headers/archive/v{{ version }}.zip
     sha256: 68dc80a943fdfc760abc15d36ff301e54ebb326e643169ec63c459827b4fbb4d
@@ -37,7 +38,8 @@ requirements:
 test:
   commands:
     - if not exist %LIBRARY_INC%\\CL\\cl.h exit 1       # [win]
-    - if not exist %LIBRARY_BIN%\\OpenCL.dll exit 1     # [win]
+    - if not exist %LIBRARY_BIN%\\OpenCL-1.dll exit 1   # [win]
+    - if not exist %LIBRARY_LIB%\\OpenCL.lib exit 1     # [win]
     - test -f $PREFIX/include/OpenCL/cl.h               # [osx]
     - test -f $PREFIX/include/CL/cl.h                   # [linux]
     - test -f $PREFIX/lib/libOpenCL${SHLIB_EXT}         # [unix]