Minor cleanup to CMake scripts

Author: peastman

CMakeLists.txt

@@ -2,7 +2,9 @@
 # OpenMM Example Plugin
 #----------------------------------------------------
 
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.17)
+
+PROJECT(OpenMMExamplePlugin)
 
 # We need to know where OpenMM is installed so we can access the headers and libraries.
 SET(OPENMM_DIR "/usr/local/openmm" CACHE PATH "Where OpenMM is installed")
@@ -85,7 +87,7 @@ ADD_SUBDIRECTORY(platforms/reference)
 ADD_SUBDIRECTORY(platforms/common)
 
 SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}")
-FIND_PACKAGE(OpenCL QUIET)
+FIND_PACKAGE(OPENCL QUIET)
 IF(OPENCL_FOUND)
     SET(EXAMPLE_BUILD_OPENCL_LIB ON CACHE BOOL "Build implementation for OpenCL")
 ELSE(OPENCL_FOUND)