Add package clBLAS (#2944)

* v2.12.2 ships outdated FindOpenCL.cmake

* clBLAS installs, passes checks, usable by 3rd party

* Added usage file

* [clblas] Convert to using a patch file

* [clfft] Revert removal of FindOpenCL -- this can be done, but it will require additional source patching

ports/clblas/CONTROL

@@ -0,0 +1,4 @@
+Source: clblas
+Version: 2.12-1
+Build-Depends: opencl
+Description: clBLAS is an OpenCL 1.2 accelerated BLAS (Basic Linear Algebra Subsystem) library.

ports/clblas/cmake.patch

@@ -0,0 +1,36 @@
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index 6a88c41..05b8029 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -276,6 +276,9 @@ endif()
+ 
+ # This will define OPENCL_FOUND
+ find_package( OpenCL ${OPENCL_VERSION} )
++set( OPENCL_FOUND ${OpenCL_FOUND})
++set( OPENCL_LIBRARIES ${OpenCL_LIBRARIES} )
++set( OPENCL_INCLUDE_DIRS ${OpenCL_INCLUDE_DIRS} )
+ 
+ # Find Boost on the system, and configure the type of boost build we want
+ set( Boost_USE_MULTITHREADED ON )
+diff --git a/src/clBLASConfig.cmake.in b/src/clBLASConfig.cmake.in
+index f52d1d6..464feca 100644
+--- a/src/clBLASConfig.cmake.in
++++ b/src/clBLASConfig.cmake.in
+@@ -1,3 +1,3 @@
+ include(${CMAKE_CURRENT_LIST_DIR}/clBLASTargets.cmake)
+-get_filename_component(CLBLAS_INCLUDE_DIRS ${CMAKE_CURRENT_LIST_DIR}/@reldir@/include ABSOLUTE)
++get_filename_component(CLBLAS_INCLUDE_DIRS ${CMAKE_CURRENT_LIST_DIR}/@reldir@/../include ABSOLUTE)
+ set(CLBLAS_LIBRARIES clBLAS)
+diff --git a/src/library/CMakeLists.txt b/src/library/CMakeLists.txt
+index 5164898..f2d5a88 100644
+--- a/src/library/CMakeLists.txt
++++ b/src/library/CMakeLists.txt
+@@ -894,7 +894,7 @@ install( TARGETS clBLAS
+          EXPORT Library
+          RUNTIME DESTINATION bin${SUFFIX_BIN}
+          LIBRARY DESTINATION lib${SUFFIX_LIB}
+-		 ARCHIVE DESTINATION lib${SUFFIX_LIB}/import
++		 ARCHIVE DESTINATION lib${SUFFIX_LIB}
+ 		)
+ 
+ # For debug builds, include the debug runtimes into the package for testing on non-developer machines

ports/clblas/portfile.cmake

@@ -0,0 +1,55 @@
+include(vcpkg_common_functions)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO clMathLibraries/clBLAS
+    REF v2.12
+    SHA512 5d9b0c58adde69e83d95e9c713e0cdc5f64785fe7e05553a14c57fa483c4ef39e9dc780c26880a7f15924967d5ce4ea29035c29d63eac7ee5a2ae5ddacac2b72
+    HEAD_REF master
+)
+
+# v2.12 has a very old FindOpenCL.cmake using OPENCL_ vs. OpenCL_ var names
+# conflicting with the built-in, more modern FindOpenCL.cmake 
+file(
+    REMOVE ${SOURCE_PATH}/src/FindOpenCL.cmake
+)
+
+vcpkg_apply_patches(
+    SOURCE_PATH ${SOURCE_PATH}
+    PATCHES ${CMAKE_CURRENT_LIST_DIR}/cmake.patch
+)
+
+vcpkg_find_acquire_program(PYTHON3)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}/src
+    PREFER_NINJA
+    OPTIONS
+        -DBUILD_TEST=OFF
+        -DBUILD_KTEST=OFF
+        -DSUFFIX_LIB=
+        -DPYTHON_EXECUTABLE=${PYTHON3}
+)
+
+vcpkg_install_cmake()
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+
+file(INSTALL
+        "${SOURCE_PATH}/LICENSE"
+    DESTINATION
+        ${CURRENT_PACKAGES_DIR}/share/clblas
+    RENAME copyright
+)
+
+file(REMOVE
+        ${CURRENT_PACKAGES_DIR}/debug/bin/clBLAS-tune.exe
+        ${CURRENT_PACKAGES_DIR}/bin/clBLAS-tune.exe
+        ${CURRENT_PACKAGES_DIR}/debug/bin/concrt140d.dll
+        ${CURRENT_PACKAGES_DIR}/debug/bin/msvcp140d.dll
+        ${CURRENT_PACKAGES_DIR}/debug/bin/vcruntime140d.dll
+)
+
+vcpkg_fixup_cmake_targets(CONFIG_PATH "CMake")
+
+vcpkg_copy_pdbs()