CMake: Produce compile commands on supported generators

CMakeLists.txt

@@ -11,6 +11,8 @@ set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
 # configure version
 set(sdrangel_VERSION_MAJOR "4")
 set(sdrangel_VERSION_MINOR "21")
@@ -207,7 +209,7 @@ elseif (WIN32)
 
   # compile with full multicore
   if(MSVC)
-    add_compile_definitions(/MP)
+    add_compile_options(/MP)
   endif()
 
   # in alternative we can use ExternalProject