Failed to load opencl on MacOSX

With the latest commit of MegPeak, ./megpeak -d opencl run failed on MacOSX, tested on both Mac Intel x64 and Mac M1.

The cmake installation provided FindOpenCL.cmake helps find_package(OpenCL) work, which find the system bundled OpenCL framework.

find_package(OpenCL)
if(OpenCL_FOUND)
  message(STATUS "--- OpenCL_FOUND : ${OpenCL_FOUND}")
  message(STATUS "--- OpenCL_INCLUDE_DIRS : ${OpenCL_INCLUDE_DIRS}")
  message(STATUS "--- OpenCL_LIBRARIES : ${OpenCL_LIBRARIES}")
  message(STATUS "--- OpenCL_VERSION_STRING : ${OpenCL_VERSION_STRING}")
  message(STATUS "--- OpenCL_VERSION_MAJOR : ${OpenCL_VERSION_MAJOR}")
  message(STATUS "--- OpenCL_VERSION_MINOR : ${OpenCL_VERSION_MINOR}")
endif()

Which gives OpenCL_LIBRARIES to:

/Library/Developer/CommandLineTools/SDKs/MacOSX12.3.sdk/System/Library/Frameworks/OpenCL.framework

Thus, I manually modify libopencl.cpp of opencl-stub in MegPeak, from

#if defined(__APPLE__) || defined(__MACOSX)
static const char* default_so_paths[] = {
        "/System/Library/Frameworks/OpenCL.framework/OpenCL",
        "libOpenCL.so"};

#if defined(__APPLE__) || defined(__MACOSX)
static const char* default_so_paths[] = {
        "/System/Library/Frameworks/OpenCL.framework/OpenCL",
 "/Library/Developer/CommandLineTools/SDKs/MacOSX12.3.sdk/System/Library/Frameworks/OpenCL.framework/OpenCL", // new added
        "libOpenCL.so"};

But still suffers:

(base) ➜  mac-arm64 git:(main) ✗ ./megpeak -d opencl
err: can not find opencl
err: failed to load opencl func: clGetPlatformIDs
opencl error -32: CL_INVALID_PLATFORM (clGetPlatformIDs(0, nullptr, &nr_platforms) at /Users/zz/work/MegPeak/src/opencl/common.cpp:OpenCLEnv:438)
(base) ➜  mac-arm64 git:(main) ✗

MegEngine / MegPeak

Failed to load opencl on MacOSX #21