Add OpenCL SDK and clMath ports (#2837)

* initial clFFT porting

* OpenCL SDK half baked

* Tried fixing Debug/Release

* Remove DLL deployment

* OpenCL SDK installs

* clFFT installs

* clFFT properly depends on OpenCL

* OpenCL SDK fixes and clFFT patches

* [clfft][opencl] Simplification, use patches instead of full files.

3 files changed, 100 insertions, 0 deletions

diff --git a/ports/opencl/CONTROL b/ports/opencl/CONTROL
new file mode 100644
index 000000000..89d4ad0e1
--- /dev/null
+++ b/ports/opencl/CONTROL
@@ -0,0 +1,3 @@
+Source: opencl
+Version: 2.2 (2017.07.18)
+Description: C/C++ headers and ICD loader (Installable Client Driver) for OpenCL
diff --git a/ports/opencl/portfile.cmake b/ports/opencl/portfile.cmake
new file mode 100644
index 000000000..f7e1bdd2f
--- /dev/null
+++ b/ports/opencl/portfile.cmake
@@ -0,0 +1,90 @@
+include(vcpkg_common_functions)
+
+# OpenCL C headers
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO KhronosGroup/OpenCL-Headers
+    REF f039db6764d52388658ef15c30b2237bbda49803
+    SHA512 5909a85f96477d731059528303435f06255e98ed8df9d4cd2b62c744b5fe41408c69c0d4068421a2813eb9ad9d70d7f1bace9ebf0db19cc09e71bb8066127c5f
+    HEAD_REF master
+)
+
+file(INSTALL
+        "${SOURCE_PATH}/opencl22/CL"
+    DESTINATION
+        ${CURRENT_PACKAGES_DIR}/include
+)
+
+# OpenCL C++ headers
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO KhronosGroup/OpenCL-CLHPP
+    REF 5dd8bb9e32a8e2f72621566b296ac8143a554270
+    SHA512 2909fe2b979b52724ef8d285180d8bfd30bdd56cb79da4effc9e03b576ec7edb5497c99a9fa30541fe63037c84ddef21d4a73e7927f3813baab2a2afeecd55ab
+    HEAD_REF master
+)
+
+vcpkg_find_acquire_program(PYTHON3)
+
+vcpkg_execute_required_process(
+    COMMAND "${PYTHON3}" "${SOURCE_PATH}/gen_cl_hpp.py"
+        -i ${SOURCE_PATH}/input_cl.hpp
+        -o ${CURRENT_PACKAGES_DIR}/include/CL/cl.hpp
+    WORKING_DIRECTORY ${SOURCE_PATH}
+    LOGNAME generate_clhpp-${TARGET_TRIPLET}
+)
+
+vcpkg_execute_required_process(
+    COMMAND "${PYTHON3}" "${SOURCE_PATH}/gen_cl_hpp.py"
+        -i ${SOURCE_PATH}/input_cl2.hpp
+        -o ${CURRENT_PACKAGES_DIR}/include/CL/cl2.hpp
+    WORKING_DIRECTORY ${SOURCE_PATH}
+    LOGNAME generate_cl2hpp-${TARGET_TRIPLET}
+)
+message(STATUS "Generating OpenCL C++ headers done")
+
+# OpenCL ICD loader
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO KhronosGroup/OpenCL-ICD-Loader
+    REF 26a38983cbe5824fd5be03eab8d037758fc44360
+    SHA512 3029f758ff0c39b57aa10d881af68e73532fd179c54063ed1d4529b7d6e27a5219e3c24b7fb5598d790ebcdc2441e00001a963671dc90fef2fc377c76d724f54
+    HEAD_REF master
+)
+
+if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
+    message(STATUS "Building the ICD loader as a static library is not supported. Building as DLLs instead.")
+    set(VCPKG_LIBRARY_LINKAGE "dynamic")
+endif()
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+    OPTIONS
+        -DOPENCL_INCLUDE_DIRS=${CURRENT_PACKAGES_DIR}/include
+)
+
+vcpkg_build_cmake(TARGET OpenCL)
+
+file(INSTALL
+        "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel/OpenCL.lib"
+    DESTINATION
+        ${CURRENT_PACKAGES_DIR}/lib
+)
+
+file(INSTALL
+        "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg/OpenCL.lib"
+    DESTINATION
+        ${CURRENT_PACKAGES_DIR}/debug/lib
+)
+
+file(INSTALL
+        "${SOURCE_PATH}/LICENSE.txt"
+    DESTINATION
+        ${CURRENT_PACKAGES_DIR}/share/${PORT}/copyright
+)
+file(COPY
+        ${CMAKE_CURRENT_LIST_DIR}/usage
+    DESTINATION
+        ${CURRENT_PACKAGES_DIR}/share/${PORT}
+)
diff --git a/ports/opencl/usage b/ports/opencl/usage
new file mode 100644
index 000000000..699ff0170
--- /dev/null
+++ b/ports/opencl/usage
@@ -0,0 +1,7 @@
+The package opencl is compatible with built-in CMake targets:
+
+    find_package(OpenCL REQUIRED)
+    target_link_libraries(main PRIVATE ${OpenCL_LIBRARIES})
+    target_include_directories(main PRIVATE ${OpenCL_INCLUDE_DIRS})
+
+You will also need to install an appropriate driver package from your CPU/GPU manufacturer.