RP@040: rework CMake for compiler warnings

examples/dual/host_hid_to_device_cdc/CMakeLists.txt

@@ -23,8 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
-# Example common such as compiler warnings
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+# Configure compilation flags and libraries for the example... see the corresponding function
+# in hw/bsp/FAMILY/family.cmake for details.
+family_configure_dual_usb_example(${PROJECT})
 
 # due to warnings from other net source, we need to prevent error from some of the warnings options
 target_compile_options(${PROJECT} PUBLIC
@@ -37,7 +38,3 @@ target_compile_options(${PROJECT} PUBLIC
         -Wno-error=sign-compare
         -Wno-error=unused-function
         )
-
-# Configure compilation flags and libraries for the example... see the corresponding function
-# in hw/bsp/FAMILY/family.cmake for details.
-family_configure_dual_usb_example(${PROJECT})