These files are not needed for cross-compile to work. Additionaly they make maintenance a PITA.

CMakeModules/UsewxWidgets.cmake

-# - Convenience include for using wxWidgets library
-# Finds if wxWidgets is installed
-# and set the appropriate libs, incdirs, flags etc.
-# INCLUDE_DIRECTORIES, LINK_DIRECTORIES and ADD_DEFINITIONS
-# are called.
-#
-# USAGE
-#  SET( wxWidgets_USE_LIBS  gl xml xrc ) # optionally: more than wx std libs
-#  FIND_PACKAGE(wxWidgets REQUIRED)
-#  INCLUDE( ${xWidgets_USE_FILE} )
-#  ... add your targets here, e.g. ADD_EXECUTABLE/ ADD_LIBRARY ...
-#  TARGET_LINK_LIBRARIERS( <yourWxDependantTarget>  ${wxWidgets_LIBRARIES})
-#
-# DEPRECATED
-#  LINK_LIBRARIES is not called in favor of adding dependencies per target.
-#
-# AUTHOR
-#  Jan Woetzel <jw -at- mip.informatik.uni-kiel.de>
-
-
-# debug message and logging.
-# comment these out for distribution
-IF    (NOT LOGFILE )
-  #  SET(LOGFILE "${PROJECT_BINARY_DIR}/CMakeOutput.log")
-ENDIF (NOT LOGFILE )
-MACRO(MSG _MSG)
-  #  FILE(APPEND ${LOGFILE} "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}):   ${_MSG}\n")
-  #  MESSAGE(STATUS "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}): ${_MSG}")
-ENDMACRO(MSG)
-
-
-MSG("wxWidgets_FOUND=${wxWidgets_FOUND}")
-IF   (wxWidgets_FOUND)
-  IF   (wxWidgets_INCLUDE_DIRS)
-    IF(wxWidgets_INCLUDE_DIRS_NO_SYSTEM)
-      INCLUDE_DIRECTORIES(${wxWidgets_INCLUDE_DIRS})
-    ELSE(wxWidgets_INCLUDE_DIRS_NO_SYSTEM)
-      INCLUDE_DIRECTORIES(SYSTEM ${wxWidgets_INCLUDE_DIRS})
-    ENDIF(wxWidgets_INCLUDE_DIRS_NO_SYSTEM)
-    MSG("wxWidgets_INCLUDE_DIRS=${wxWidgets_INCLUDE_DIRS}")
-  ENDIF(wxWidgets_INCLUDE_DIRS)
-
-  IF   (wxWidgets_LIBRARY_DIRS)
-    LINK_DIRECTORIES(${wxWidgets_LIBRARY_DIRS})
-    MSG("wxWidgets_LIBRARY_DIRS=${wxWidgets_LIBRARY_DIRS}")
-  ENDIF(wxWidgets_LIBRARY_DIRS)
-
-  IF   (wxWidgets_DEFINITIONS)
-    ADD_DEFINITIONS( ${wxWidgets_DEFINITIONS} )
-    MSG("wxWidgets_DEFINITIONS=${wxWidgets_DEFINITIONS}")
-  ENDIF(wxWidgets_DEFINITIONS)
-
-  IF   (wxWidgets_CXX_FLAGS)
-    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${wxWidgets_CXX_FLAGS}")
-    MSG("wxWidgets_CXX_FLAGS=${wxWidgets_CXX_FLAGS}")
-  ENDIF(wxWidgets_CXX_FLAGS)
-
-  # DEPRECATED JW
-  # just for backward compatibility: add deps to all targets
-  # library projects better use advanced FIND_PACKAGE(wxWidgets) directly.
-  #IF(wxWidgets_LIBRARIES)
-  #  LINK_LIBRARIES(${wxWidgets_LIBRARIES})
-  #  # BUG: str too long:  MSG("wxWidgets_LIBRARIES=${wxWidgets_LIBRARIES}")
-  #  IF(LOGFILE)
-  #    FILE(APPEND ${LOGFILE} "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}):   ${wxWidgets_LIBRARIES}\n")
-  #  ENDIF(LOGFILE)
-  #ENDIF(wxWidgets_LIBRARIES)
-
-ELSE (wxWidgets_FOUND)
-  MESSAGE("wxWidgets requested but not found.")
-ENDIF(wxWidgets_FOUND)