CMakeLists health updates

Signed-off-by: Michael R Carroll <[email protected]>

Author: MichaelRoyceCarroll

RenderingToolkit/GettingStarted/03_openvkl_gsg/CMakeLists.txt

@@ -2,22 +2,31 @@ cmake_minimum_required(VERSION 3.16)
 project(OPENVKL_GSG LANGUAGES C CXX)
 
 set(ONEAPI_ROOT "")
-if($ENV{ONEAPI_ROOT})
-        set(ONEAPI_ROOT $ENV{ONEAPI_ROOT})
+if(DEFINED ENV{ONEAPI_ROOT})
+  set(ONEAPI_ROOT "$ENV{ONEAPI_ROOT}")
+  message(STATUS "ONEAPI_ROOT FROM ENVIRONMENT: ${ONEAPI_ROOT}")
 else()
-        if(WIN32)
-                set(ONEAPI_ROOT "C:/Program Files (x86)/Intel/oneAPI")
-        else()
-                set(ONEAPI_ROOT /opt/intel/oneapi)
-        endif()
-endif($ENV{ONEAPI_ROOT})
+  if(WIN32)
+    set(ONEAPI_ROOT "C:/Program Files (x86)/Intel/oneAPI")
+  else()
+    set(ONEAPI_ROOT /opt/intel/oneapi)
+  endif()
+  message(STATUS "ONEAPI_ROOT DEFAULT: ${ONEAPI_ROOT}")
+endif(DEFINED ENV{ONEAPI_ROOT})
 
 set(OPENVKL_ROOT ${ONEAPI_ROOT}/openvkl/latest)
 set(OPENVKL_INCLUDE_DIR ${OPENVKL_ROOT}/include)
 message(STATUS "OPENVKL_INCLUDE_DIR: ${OPENVKL_INCLUDE_DIR}")
-message(STATUS "ONEAPI_ROOT: ${ONEAPI_ROOT}")
 find_package(openvkl REQUIRED PATHS ${ONEAPI_ROOT})
 
+if(MSVC)
+  set(CMAKE_CXX_STANDARD 11)
+  set(CMAKE_CXX_STANDARD_REQUIRED ON)
+  set(CMAKE_CXX_EXTENSIONS OFF)
+else()
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+endif(MSVC)
+
 include_directories(${OPENVKL_INCLUDE_DIR} ${ONEAPI_ROOT}/rkcommon/latest/include)
 link_directories(${OPENVKL_ROOT}/lib)