# - Find a wxWidgets (a.k.a., wxWindows) installation.
# This module finds if wxWidgets is installed and selects a default
# configuration to use. wxWidgets is a modular library. To specify the
# modules that you will use, you need to name them as components to
# the package:
# 
# FIND_PACKAGE(wxWidgets COMPONENTS base core ...)
# 
# There are two search branches: a windows style and a unix style. For
# windows, the following variables are searched for and set to
# defaults in case of multiple choices. Change them if the defaults
# are not desired (i.e., these are the only variables you should
# change to select a configuration):
#
#  wxWidgets_ROOT_DIR      - Base wxWidgets directory
#                            (e.g., C:/wxWidgets-2.6.3).
#  wxWidgets_LIB_DIR       - Path to wxWidgets libraries
#                            (e.g., C:/wxWidgets-2.6.3/lib/vc_lib).
#  wxWidgets_CONFIGURATION - Configuration to use
#                            (e.g., msw, mswd, mswu, mswunivud, etc.)
# 
# For unix style it uses the wx-config utility. You can select between
# debug/release, unicode/ansi, universal/non-universal, and
# static/shared in the QtDialog or ccmake interfaces by turning ON/OFF
# the following variables:
#
#  wxWidgets_USE_DEBUG
#  wxWidgets_USE_UNICODE
#  wxWidgets_USE_UNIVERSAL
#  wxWidgets_USE_STATIC
#  
# The following are set after the configuration is done for both
# windows and unix style:
#
#  wxWidgets_FOUND            - Set to TRUE if wxWidgets was found.
#  wxWidgets_INCLUDE_DIRS     - Include directories for WIN32
#                               i.e., where to find "wx/wx.h" and
#                               "wx/setup.h"; possibly empty for unices.
#  wxWidgets_LIBRARIES        - Path to the wxWidgets libraries.
#  wxWidgets_LIBRARY_DIRS     - compile time link dirs, useful for
#                               rpath on UNIX. Typically an empty string
#                               in WIN32 environment.
#  wxWidgets_DEFINITIONS      - Contains defines required to compile/link
#                               against WX, e.g. -DWXUSINGDLL
#  wxWidgets_CXX_FLAGS        - Include dirs and ompiler flags for
#                               unices, empty on WIN32. Esentially
#                               "`wx-config --cxxflags`".
#  wxWidgets_USE_FILE         - Convenience include file.
#
# Sample usage:
#   FIND_PACKAGE(wxWidgets COMPONENTS base core gl net)
#   IF(wxWidgets_FOUND)
#     INCLUDE(${wxWidgets_USE_FILE})
#     # and for each of your dependant executable/library targets:
#     TARGET_LINK_LIBRARIES(<YourTarget> ${wxWidgets_LIBRARIES})
#   ENDIF(wxWidgets_FOUND)
#
# If wxWidgets is required (i.e., not an optional part):
#   FIND_PACKAGE(wxWidgets REQUIRED base core gl net)
#   INCLUDE(${wxWidgets_USE_FILE})
#   # and for each of your dependant executable/library targets:
#   TARGET_LINK_LIBRARIES(<YourTarget> ${wxWidgets_LIBRARIES})

#
# FIXME: check this and provide a correct sample usage...
#        Remember to connect back to the upper text.
# Sample usage with monolithic wx build:
#
#   FIND_PACKAGE(wxWidgets COMPONENTS mono)
#   ...


# NOTES
#
# This module has been tested on the WIN32 platform with wxWidgets
# 2.6.2, 2.6.3, and 2.5.3. However, it has been designed to
# easily extend support to all possible builds, e.g., static/shared,
# debug/release, unicode, universal, multilib/monolithic, etc..
#
# If you want to use the module and your build type is not supported
# out-of-the-box, please contact me to exchange information on how
# your system is setup and I'll try to add support for it.
#
# AUTHOR
#
# Miguel A. Figueroa-Villanueva (miguelf at ieee dot org).
# Jan Woetzel (jw at mip.informatik.uni-kiel.de).
#
# Based on previous works of:
# Jan Woetzel (FindwxWindows.cmake),
# Jorgen Bodde and Jerry Fath (FindwxWin.cmake).

# TODO/ideas
#
# (1) Option/Setting to use all available wx libs
# In contrast to expert developer who lists the
# minimal set of required libs in wxWidgets_USE_LIBS
# there is the newbie user:
#   - who just wants to link against WX with more 'magic'
#   - doesn't know the internal structure of WX or how it was built,
#     in particular if it is monolithic or not
#   - want to link against all available WX libs
# Basically, the intent here is to mimic what wx-config would do by
# default (i.e., `wx-config --libs`).
#
# Possible solution:
#   Add a reserved keyword "std" that initializes to what wx-config
# would default to. If the user has not set the wxWidgets_USE_LIBS,
# default to "std" instead of "base core" as it is now. To implement
# "std" will basically boil down to a FOR_EACH lib-FOUND, but maybe
# checking whether a minimal set was found.


# FIXME: This and all the DBG_MSG calls should be removed after the
# module stabilizes.
# 
# Helper macro to control the debugging output globally. There are
# two versions for controlling how verbose your output should be.
MACRO(DBG_MSG _MSG)
#  MESSAGE(STATUS
#    "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}): ${_MSG}")
ENDMACRO(DBG_MSG)
MACRO(DBG_MSG_V _MSG)
#  MESSAGE(STATUS
#    "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}): ${_MSG}")
ENDMACRO(DBG_MSG_V)

# Clear return values in case the module is loaded more than once.
SET(wxWidgets_FOUND FALSE)
SET(wxWidgets_INCLUDE_DIRS "")
SET(wxWidgets_LIBRARIES    "")
SET(wxWidgets_LIBRARY_DIRS "")
SET(wxWidgets_CXX_FLAGS    "")

# Using SYSTEM with INCLUDE_DIRECTORIES in conjunction with wxWidgets on
# the Mac produces compiler errors. Set wxWidgets_INCLUDE_DIRS_NO_SYSTEM
# to prevent UsewxWidgets.cmake from using SYSTEM.
#
# See cmake mailing list discussions for more info:
#   http://www.cmake.org/pipermail/cmake/2008-April/021115.html
#   http://www.cmake.org/pipermail/cmake/2008-April/021146.html
#
IF(APPLE)
  SET(wxWidgets_INCLUDE_DIRS_NO_SYSTEM 1)
ENDIF(APPLE)

# DEPRECATED: This is a patch to support the DEPRECATED use of
# wxWidgets_USE_LIBS.
#
# If wxWidgets_USE_LIBS is set:
# - if using <components>, then override wxWidgets_USE_LIBS
# - else set wxWidgets_FIND_COMPONENTS to wxWidgets_USE_LIBS
IF(wxWidgets_USE_LIBS AND NOT wxWidgets_FIND_COMPONENTS)
  SET(wxWidgets_FIND_COMPONENTS ${wxWidgets_USE_LIBS})
ENDIF(wxWidgets_USE_LIBS AND NOT wxWidgets_FIND_COMPONENTS)
DBG_MSG("wxWidgets_FIND_COMPONENTS : ${wxWidgets_FIND_COMPONENTS}")

# Add the convenience use file if available.
#
# Get dir of this file which may reside in:
# - CMAKE_MAKE_ROOT/Modules on CMake installation
# - CMAKE_MODULE_PATH if user prefers his own specialized version
SET(wxWidgets_USE_FILE "")
GET_FILENAME_COMPONENT(
  wxWidgets_CURRENT_LIST_DIR ${CMAKE_CURRENT_LIST_FILE} PATH)
# Prefer an existing customized version, but the user might override
# the FindwxWidgets module and not the UsewxWidgets one.
IF(EXISTS "${wxWidgets_CURRENT_LIST_DIR}/UsewxWidgets.cmake")
  SET(wxWidgets_USE_FILE
    "${wxWidgets_CURRENT_LIST_DIR}/UsewxWidgets.cmake")
ELSE(EXISTS "${wxWidgets_CURRENT_LIST_DIR}/UsewxWidgets.cmake")
  SET(wxWidgets_USE_FILE UsewxWidgets.cmake)
ENDIF(EXISTS "${wxWidgets_CURRENT_LIST_DIR}/UsewxWidgets.cmake")

#=====================================================================
#=====================================================================
IF(WIN32)
  SET(WIN32_STYLE_FIND 1)
ENDIF(WIN32)
IF(MINGW)
  SET(WIN32_STYLE_FIND 0)
  SET(UNIX_STYLE_FIND 1)
ENDIF(MINGW)
IF(UNIX)
  SET(UNIX_STYLE_FIND 1)
ENDIF(UNIX)

#=====================================================================
# WIN32_STYLE_FIND
#=====================================================================
IF(WIN32_STYLE_FIND)
  # Useful common wx libs needed by almost all components.
  SET(wxWidgets_COMMON_LIBRARIES png tiff jpeg zlib regex expat)

  # DEPRECATED: Use FIND_PACKAGE(wxWidgets COMPONENTS mono) instead.
  IF(NOT wxWidgets_FIND_COMPONENTS)
    IF(wxWidgets_USE_MONOLITHIC)
      SET(wxWidgets_FIND_COMPONENTS mono)
    ELSE(wxWidgets_USE_MONOLITHIC)
      SET(wxWidgets_FIND_COMPONENTS base core) # this is default
    ENDIF(wxWidgets_USE_MONOLITHIC)
  ENDIF(NOT wxWidgets_FIND_COMPONENTS)

  # Always add the common required libs.
  LIST(APPEND wxWidgets_FIND_COMPONENTS ${wxWidgets_COMMON_LIBRARIES})

  #-------------------------------------------------------------------
  # WIN32: Helper MACROS
  #-------------------------------------------------------------------
  #
  # Get filename components for a configuration. For example,
  #   if _CONFIGURATION = mswunivud, then _UNV=univ, _UCD=u _DBG=d
  #   if _CONFIGURATION = mswu,      then _UNV="",   _UCD=u _DBG=""
  #
  MACRO(WX_GET_NAME_COMPONENTS _CONFIGURATION _UNV _UCD _DBG)
    STRING(REGEX MATCH "univ" ${_UNV} "${_CONFIGURATION}")
    STRING(REGEX REPLACE "msw.*(u)[d]*$" "u" ${_UCD} "${_CONFIGURATION}")
    IF(${_UCD} STREQUAL ${_CONFIGURATION})
      SET(${_UCD} "")
    ENDIF(${_UCD} STREQUAL ${_CONFIGURATION})
    STRING(REGEX MATCH "d$" ${_DBG} "${_CONFIGURATION}")
  ENDMACRO(WX_GET_NAME_COMPONENTS)

  #
  # Find libraries associated to a configuration.
  #
  MACRO(WX_FIND_LIBS _UNV _UCD _DBG)
    DBG_MSG_V("m_unv = ${_UNV}")
    DBG_MSG_V("m_ucd = ${_UCD}")
    DBG_MSG_V("m_dbg = ${_DBG}")

    # FIXME: What if both regex libs are available. regex should be
    # found outside the loop and only wx${LIB}${_UCD}${_DBG}.
    # Find wxWidgets common libraries.
    FOREACH(LIB ${wxWidgets_COMMON_LIBRARIES})
      FIND_LIBRARY(WX_${LIB}${_DBG}
        NAMES
        wx${LIB}${_UCD}${_DBG} # for regex
        wx${LIB}${_DBG}
        PATHS ${WX_LIB_DIR}
        NO_DEFAULT_PATH
        )
      MARK_AS_ADVANCED(WX_${LIB}${_DBG})
    ENDFOREACH(LIB)

    # Find wxWidgets multilib base libraries.
    FIND_LIBRARY(WX_base${_DBG}
      NAMES
      wxbase29${_UCD}${_DBG}
      wxbase28${_UCD}${_DBG}
      wxbase27${_UCD}${_DBG}
      wxbase26${_UCD}${_DBG}
      wxbase25${_UCD}${_DBG}
      PATHS ${WX_LIB_DIR}
      NO_DEFAULT_PATH
      )
    MARK_AS_ADVANCED(WX_base${_DBG})
    FOREACH(LIB net odbc xml)
      FIND_LIBRARY(WX_${LIB}${_DBG}
        NAMES
        wxbase29${_UCD}${_DBG}_${LIB}
        wxbase28${_UCD}${_DBG}_${LIB}
        wxbase27${_UCD}${_DBG}_${LIB}
        wxbase26${_UCD}${_DBG}_${LIB}
        wxbase25${_UCD}${_DBG}_${LIB}
        PATHS ${WX_LIB_DIR}
        NO_DEFAULT_PATH
        )
      MARK_AS_ADVANCED(WX_${LIB}${_DBG})
    ENDFOREACH(LIB)

    # Find wxWidgets monolithic library.
    FIND_LIBRARY(WX_mono${_DBG}
      NAMES
      wxmsw${_UNV}29${_UCD}${_DBG}
      wxmsw${_UNV}28${_UCD}${_DBG}
      wxmsw${_UNV}27${_UCD}${_DBG}
      wxmsw${_UNV}26${_UCD}${_DBG}
      wxmsw${_UNV}25${_UCD}${_DBG}
      PATHS ${WX_LIB_DIR}
      NO_DEFAULT_PATH
      )
    MARK_AS_ADVANCED(WX_mono${_DBG})

    # Find wxWidgets multilib libraries.
    FOREACH(LIB core adv aui html media xrc dbgrid gl qa)
      FIND_LIBRARY(WX_${LIB}${_DBG}
        NAMES
        wxmsw${_UNV}29${_UCD}${_DBG}_${LIB}
        wxmsw${_UNV}28${_UCD}${_DBG}_${LIB}
        wxmsw${_UNV}27${_UCD}${_DBG}_${LIB}
        wxmsw${_UNV}26${_UCD}${_DBG}_${LIB}
        wxmsw${_UNV}25${_UCD}${_DBG}_${LIB}
        PATHS ${WX_LIB_DIR}
        NO_DEFAULT_PATH
        )
      MARK_AS_ADVANCED(WX_${LIB}${_DBG})
    ENDFOREACH(LIB)
  ENDMACRO(WX_FIND_LIBS)

  #
  # Clear all library paths, so that FIND_LIBRARY refinds them.
  #
  # Clear a lib, reset its found flag, and mark as advanced.
  MACRO(WX_CLEAR_LIB _LIB)
    SET(${_LIB} "${_LIB}-NOTFOUND" CACHE FILEPATH "Cleared." FORCE)
    SET(${_LIB}_FOUND FALSE)
    MARK_AS_ADVANCED(${_LIB})
  ENDMACRO(WX_CLEAR_LIB)
  # Clear all debug or release library paths (arguments are "d" or "").
  MACRO(WX_CLEAR_ALL_LIBS _DBG)
    # Clear wxWidgets common libraries.
    FOREACH(LIB ${wxWidgets_COMMON_LIBRARIES})
      WX_CLEAR_LIB(WX_${LIB}${_DBG})
    ENDFOREACH(LIB)

    # Clear wxWidgets multilib base libraries.
    WX_CLEAR_LIB(WX_base${_DBG})
    FOREACH(LIB net odbc xml)
      WX_CLEAR_LIB(WX_${LIB}${_DBG})
    ENDFOREACH(LIB)

    # Clear wxWidgets monolithic library.
    WX_CLEAR_LIB(WX_mono${_DBG})

    # Clear wxWidgets multilib libraries.
    FOREACH(LIB core adv aui html media xrc dbgrid gl qa)
      WX_CLEAR_LIB(WX_${LIB}${_DBG})
    ENDFOREACH(LIB)
  ENDMACRO(WX_CLEAR_ALL_LIBS)
  # Clear all wxWidgets debug libraries.
  MACRO(WX_CLEAR_ALL_DBG_LIBS)
    WX_CLEAR_ALL_LIBS("d")
  ENDMACRO(WX_CLEAR_ALL_DBG_LIBS)
  # Clear all wxWidgets release libraries.
  MACRO(WX_CLEAR_ALL_REL_LIBS)
    WX_CLEAR_ALL_LIBS("")
  ENDMACRO(WX_CLEAR_ALL_REL_LIBS)

  #
  # Set the wxWidgets_LIBRARIES variable.
  # Also, Sets output variable wxWidgets_FOUND to FALSE if it fails.
  #
  MACRO(WX_SET_LIBRARIES _LIBS _DBG)
    DBG_MSG_V("Looking for ${${_LIBS}}")
    IF(WX_USE_REL_AND_DBG)
      FOREACH(LIB ${${_LIBS}})
        DBG_MSG_V("Searching for ${LIB} and ${LIB}d")
        DBG_MSG_V("WX_${LIB}  : ${WX_${LIB}}")
        DBG_MSG_V("WX_${LIB}d : ${WX_${LIB}d}")
        IF(WX_${LIB} AND WX_${LIB}d)
          DBG_MSG_V("Found ${LIB} and ${LIB}d")
          LIST(APPEND wxWidgets_LIBRARIES
            debug ${WX_${LIB}d} optimized ${WX_${LIB}}
            )
        ELSE(WX_${LIB} AND WX_${LIB}d)
          DBG_MSG_V("- not found due to missing WX_${LIB}=${WX_${LIB}} or WX_${LIB}d=${WX_${LIB}d}")
          SET(wxWidgets_FOUND FALSE)
        ENDIF(WX_${LIB} AND WX_${LIB}d)
      ENDFOREACH(LIB)
    ELSE(WX_USE_REL_AND_DBG)
      FOREACH(LIB ${${_LIBS}})
        DBG_MSG_V("Searching for ${LIB}${_DBG}")
        DBG_MSG_V("WX_${LIB}${_DBG} : ${WX_${LIB}${_DBG}}")
        IF(WX_${LIB}${_DBG})
          DBG_MSG_V("Found ${LIB}${_DBG}")
          LIST(APPEND wxWidgets_LIBRARIES ${WX_${LIB}${_DBG}})
        ELSE(WX_${LIB}${_DBG})
          DBG_MSG_V(
            "- not found due to missing WX_${LIB}${_DBG}=${WX_${LIB}${_DBG}}")
          SET(wxWidgets_FOUND FALSE)
        ENDIF(WX_${LIB}${_DBG})
      ENDFOREACH(LIB)
    ENDIF(WX_USE_REL_AND_DBG)

    DBG_MSG_V("OpenGL")
    LIST(FIND ${_LIBS} gl WX_USE_GL)
    IF(NOT WX_USE_GL EQUAL -1)
      DBG_MSG_V("- is required.")
      LIST(APPEND wxWidgets_LIBRARIES opengl32 glu32)
    ENDIF(NOT WX_USE_GL EQUAL -1)

    LIST(APPEND wxWidgets_LIBRARIES winmm comctl32 rpcrt4 wsock32)
  ENDMACRO(WX_SET_LIBRARIES)

  #-------------------------------------------------------------------
  # WIN32: Start actual work.
  #-------------------------------------------------------------------

  # Look for an installation tree.
  FIND_PATH(wxWidgets_ROOT_DIR 
    NAMES include/wx/wx.h
    PATHS
      $ENV{wxWidgets_ROOT_DIR}
      $ENV{WXWIN}
      "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\wxWidgets_is1;Inno Setup: App Path]"  # WX 2.6.x
      C:/
      D:/
      $ENV{ProgramFiles}
    PATH_SUFFIXES 
      wxWidgets-2.8.7
      wxWidgets-2.8.6
      wxWidgets-2.8.5
      wxWidgets-2.8.4
      wxWidgets-2.8.3
      wxWidgets-2.8.2
      wxWidgets-2.8.1
      wxWidgets-2.8.0
      wxWidgets-2.7.4
      wxWidgets-2.7.3
      wxWidgets-2.7.2
      wxWidgest-2.7.1
      wxWidgets-2.7.0
      wxWidgets-2.7.0-1
      wxWidgets-2.6.3
      wxWidgets-2.6.2
      wxWidgets-2.6.1
      wxWidgets-2.5.4
      wxWidgets-2.5.3
      wxWidgets-2.5.2
      wxWidgets-2.5.1
      wxWidgets
    DOC "wxWidgets base/installation directory?"
    )

  # If wxWidgets_ROOT_DIR changed, clear lib dir.
  IF(NOT WX_ROOT_DIR STREQUAL wxWidgets_ROOT_DIR)
    SET(WX_ROOT_DIR ${wxWidgets_ROOT_DIR}
        CACHE INTERNAL "wxWidgets_ROOT_DIR")
    SET(wxWidgets_LIB_DIR "wxWidgets_LIB_DIR-NOTFOUND"
        CACHE PATH "Cleared." FORCE)
  ENDIF(NOT WX_ROOT_DIR STREQUAL wxWidgets_ROOT_DIR)

  IF(WX_ROOT_DIR)
    # Select one default tree inside the already determined wx tree.
    # Prefer static/shared order usually consistent with build
    # settings.
    IF(BUILD_SHARED_LIBS)
      FIND_PATH(wxWidgets_LIB_DIR
        NAMES wxpng.lib wxpngd.lib
        PATHS
        ${WX_ROOT_DIR}/lib/vc_dll   # prefer shared
        ${WX_ROOT_DIR}/lib/vc_lib
        DOC "Path to wxWidgets libraries?"
        NO_DEFAULT_PATH
        )
    ELSE(BUILD_SHARED_LIBS)
      FIND_PATH(wxWidgets_LIB_DIR
        NAMES wxpng.lib wxpngd.lib
        PATHS
        ${WX_ROOT_DIR}/lib/vc_lib   # prefer static
        ${WX_ROOT_DIR}/lib/vc_dll
        DOC "Path to wxWidgets libraries?"
        NO_DEFAULT_PATH
        )
    ENDIF(BUILD_SHARED_LIBS)

    # If wxWidgets_LIB_DIR changed, clear all libraries.
    IF(NOT WX_LIB_DIR STREQUAL wxWidgets_LIB_DIR)
      SET(WX_LIB_DIR ${wxWidgets_LIB_DIR} CACHE INTERNAL "wxWidgets_LIB_DIR")
      WX_CLEAR_ALL_DBG_LIBS()
      WX_CLEAR_ALL_REL_LIBS()
    ENDIF(NOT WX_LIB_DIR STREQUAL wxWidgets_LIB_DIR)

    IF(WX_LIB_DIR)
      SET(wxWidgets_FOUND TRUE)

      # If building shared libs, define WXUSINGDLL to use dllimport.
      IF(WX_LIB_DIR MATCHES ".*[dD][lL][lL].*")
        SET(wxWidgets_DEFINITIONS "-DWXUSINGDLL")
        DBG_MSG_V("detected SHARED/DLL tree WX_LIB_DIR=${WX_LIB_DIR}")
      ENDIF(WX_LIB_DIR MATCHES ".*[dD][lL][lL].*")

      # Search for available configuration types.
      FOREACH(CFG mswunivud mswunivd mswud mswd mswunivu mswuniv mswu msw)
        SET(WX_${CFG}_FOUND FALSE)
        IF(EXISTS ${WX_LIB_DIR}/${CFG})
          LIST(APPEND WX_CONFIGURATION_LIST ${CFG})
          SET(WX_${CFG}_FOUND TRUE)
          SET(WX_CONFIGURATION ${CFG})
        ENDIF(EXISTS ${WX_LIB_DIR}/${CFG})
      ENDFOREACH(CFG)
      DBG_MSG_V("WX_CONFIGURATION_LIST=${WX_CONFIGURATION_LIST}")

      IF(WX_CONFIGURATION)
        # If the selected configuration wasn't found force the default
        # one. Otherwise, use it but still force a refresh for
        # updating the doc string with the current list of available
        # configurations.
        IF(NOT WX_${wxWidgets_CONFIGURATION}_FOUND)
          SET(wxWidgets_CONFIGURATION ${WX_CONFIGURATION} CACHE STRING
            "Set wxWidgets configuration (${WX_CONFIGURATION_LIST})" FORCE)
        ELSE(NOT WX_${wxWidgets_CONFIGURATION}_FOUND)
          SET(wxWidgets_CONFIGURATION ${wxWidgets_CONFIGURATION} CACHE STRING
            "Set wxWidgets configuration (${WX_CONFIGURATION_LIST})" FORCE)
        ENDIF(NOT WX_${wxWidgets_CONFIGURATION}_FOUND)

        # If release config selected, and both release/debug exist.
        IF(WX_${wxWidgets_CONFIGURATION}d_FOUND)
          OPTION(wxWidgets_USE_REL_AND_DBG
            "Use release and debug configurations?" TRUE)
          SET(WX_USE_REL_AND_DBG ${wxWidgets_USE_REL_AND_DBG})
        ELSE(WX_${wxWidgets_CONFIGURATION}d_FOUND)
          # If the option exists (already in cache), force it false.
          IF(wxWidgets_USE_REL_AND_DBG)
            SET(wxWidgets_USE_REL_AND_DBG FALSE CACHE BOOL
              "No ${wxWidgets_CONFIGURATION}d found." FORCE)
          ENDIF(wxWidgets_USE_REL_AND_DBG)
          SET(WX_USE_REL_AND_DBG FALSE)
        ENDIF(WX_${wxWidgets_CONFIGURATION}d_FOUND)

        # Get configuration parameters from the name.
        WX_GET_NAME_COMPONENTS(${wxWidgets_CONFIGURATION} UNV UCD DBG)

        # Set wxWidgets main include directory.
        IF(EXISTS ${WX_ROOT_DIR}/include/wx/wx.h)
          SET(wxWidgets_INCLUDE_DIRS ${WX_ROOT_DIR}/include)
        ELSE(EXISTS ${WX_ROOT_DIR}/include/wx/wx.h)
          DBG_MSG("wxWidgets_FOUND FALSE because WX_ROOT_DIR=${WX_ROOT_DIR} has no ${WX_ROOT_DIR}/include/wx/wx.h")
          SET(wxWidgets_FOUND FALSE)
        ENDIF(EXISTS ${WX_ROOT_DIR}/include/wx/wx.h)

        # Set wxWidgets lib setup include directory.
        IF(EXISTS ${WX_LIB_DIR}/${wxWidgets_CONFIGURATION}/wx/setup.h)
          LIST(APPEND wxWidgets_INCLUDE_DIRS
            ${WX_LIB_DIR}/${wxWidgets_CONFIGURATION})
        ELSE(EXISTS ${WX_LIB_DIR}/${wxWidgets_CONFIGURATION}/wx/setup.h)
          DBG_MSG("WXWIDGET_FOUND FALSE because ${WX_LIB_DIR}/${wxWidgets_CONFIGURATION}/wx/setup.h does not exists.")
          SET(wxWidgets_FOUND FALSE)
        ENDIF(EXISTS ${WX_LIB_DIR}/${wxWidgets_CONFIGURATION}/wx/setup.h)

        # Find wxWidgets libraries.
        WX_FIND_LIBS("${UNV}" "${UCD}" "${DBG}")
        IF(WX_USE_REL_AND_DBG)
          WX_FIND_LIBS("${UNV}" "${UCD}" "d")
        ENDIF(WX_USE_REL_AND_DBG)

        # Settings for requested libs (i.e., include dir, libraries, etc.).
        WX_SET_LIBRARIES(wxWidgets_FIND_COMPONENTS "${DBG}")

      ENDIF(WX_CONFIGURATION)
    ENDIF(WX_LIB_DIR)
  ENDIF(WX_ROOT_DIR)

#=====================================================================
# UNIX_STYLE_FIND
#=====================================================================
ELSE(WIN32_STYLE_FIND)
  IF(UNIX_STYLE_FIND)
    #-----------------------------------------------------------------
    # UNIX: Helper MACROS
    #-----------------------------------------------------------------
    #
    # Set the default values based on "wx-config --selected-config".
    #
    MACRO(WX_CONFIG_SELECT_GET_DEFAULT)
      EXECUTE_PROCESS(
        COMMAND sh "${wxWidgets_CONFIG_EXECUTABLE}" --selected-config
        OUTPUT_VARIABLE _wx_selected_config
        RESULT_VARIABLE _wx_result
        ERROR_QUIET
        )
      IF(_wx_result EQUAL 0)
        FOREACH(_opt_name debug static unicode universal)
          STRING(TOUPPER ${_opt_name} _upper_opt_name)
          IF(_wx_selected_config MATCHES ".*${_opt_name}.*")
            SET(wxWidgets_DEFAULT_${_upper_opt_name} ON)
          ELSE(_wx_selected_config MATCHES ".*${_opt_name}.*")
            SET(wxWidgets_DEFAULT_${_upper_opt_name} OFF)
          ENDIF(_wx_selected_config MATCHES ".*${_opt_name}.*")
        ENDFOREACH(_opt_name)
      ELSE(_wx_result EQUAL 0)
        FOREACH(_upper_opt_name DEBUG STATIC UNICODE UNIVERSAL)
          SET(wxWidgets_DEFAULT_${_upper_opt_name} OFF)
        ENDFOREACH(_upper_opt_name)
      ENDIF(_wx_result EQUAL 0)
    ENDMACRO(WX_CONFIG_SELECT_GET_DEFAULT)

    #
    # Query a boolean configuration option to determine if the system
    # has both builds available. If so, provide the selection option
    # to the user.
    #
    MACRO(WX_CONFIG_SELECT_QUERY_BOOL _OPT_NAME _OPT_HELP)
      EXECUTE_PROCESS(
        COMMAND sh "${wxWidgets_CONFIG_EXECUTABLE}" --${_OPT_NAME}=yes
        RESULT_VARIABLE _wx_result_yes
        OUTPUT_QUIET
        ERROR_QUIET
        )
      EXECUTE_PROCESS(
        COMMAND sh "${wxWidgets_CONFIG_EXECUTABLE}" --${_OPT_NAME}=no
        RESULT_VARIABLE _wx_result_no
        OUTPUT_QUIET
        ERROR_QUIET
        )
      STRING(TOUPPER ${_OPT_NAME} _UPPER_OPT_NAME)
      IF(_wx_result_yes EQUAL 0 AND _wx_result_no EQUAL 0)
        OPTION(wxWidgets_USE_${_UPPER_OPT_NAME}
          ${_OPT_HELP} ${wxWidgets_DEFAULT_${_UPPER_OPT_NAME}})
      ELSE(_wx_result_yes EQUAL 0 AND _wx_result_no EQUAL 0)
        # If option exists (already in cache), force to available one.
        IF(DEFINED wxWidgets_USE_${_UPPER_OPT_NAME})
          IF(_wx_result_yes EQUAL 0)
            SET(wxWidgets_USE_${_UPPER_OPT_NAME} ON  CACHE BOOL ${_OPT_HELP} FORCE)
          ELSE(_wx_result_yes EQUAL 0)
            SET(wxWidgets_USE_${_UPPER_OPT_NAME} OFF CACHE BOOL ${_OPT_HELP} FORCE)
          ENDIF(_wx_result_yes EQUAL 0)
        ENDIF(DEFINED wxWidgets_USE_${_UPPER_OPT_NAME})
      ENDIF(_wx_result_yes EQUAL 0 AND _wx_result_no EQUAL 0)
    ENDMACRO(WX_CONFIG_SELECT_QUERY_BOOL)

    # 
    # Set wxWidgets_SELECT_OPTIONS to wx-config options for selecting
    # among multiple builds.
    #
    MACRO(WX_CONFIG_SELECT_SET_OPTIONS)
      SET(wxWidgets_SELECT_OPTIONS "")
      FOREACH(_opt_name debug static unicode universal)
        STRING(TOUPPER ${_opt_name} _upper_opt_name)
        IF(DEFINED wxWidgets_USE_${_upper_opt_name})
          IF(wxWidgets_USE_${_upper_opt_name})
            LIST(APPEND wxWidgets_SELECT_OPTIONS --${_opt_name}=yes)
          ELSE(wxWidgets_USE_${_upper_opt_name})
            LIST(APPEND wxWidgets_SELECT_OPTIONS --${_opt_name}=no)
          ENDIF(wxWidgets_USE_${_upper_opt_name})
        ENDIF(DEFINED wxWidgets_USE_${_upper_opt_name})
      ENDFOREACH(_opt_name)
    ENDMACRO(WX_CONFIG_SELECT_SET_OPTIONS)

    #-----------------------------------------------------------------
    # UNIX: Start actual work.
    #-----------------------------------------------------------------
    # Support cross-compiling, only search in the target platform.
    FIND_PROGRAM(wxWidgets_CONFIG_EXECUTABLE wx-config
      ONLY_CMAKE_FIND_ROOT_PATH
      )

    IF(wxWidgets_CONFIG_EXECUTABLE)
      SET(wxWidgets_FOUND TRUE)

      # get defaults based on "wx-config --selected-config"
      WX_CONFIG_SELECT_GET_DEFAULT()

      # for each option: if both builds are available, provide option
      WX_CONFIG_SELECT_QUERY_BOOL(debug "Use debug build?")
      WX_CONFIG_SELECT_QUERY_BOOL(unicode "Use unicode build?")
      WX_CONFIG_SELECT_QUERY_BOOL(universal "Use universal build?")
      WX_CONFIG_SELECT_QUERY_BOOL(static "Link libraries statically?")

      # process selection to set wxWidgets_SELECT_OPTIONS
      WX_CONFIG_SELECT_SET_OPTIONS()
      DBG_MSG("wxWidgets_SELECT_OPTIONS=${wxWidgets_SELECT_OPTIONS}")

      # run the wx-config program to get cxxflags
      EXECUTE_PROCESS(
        COMMAND sh "${wxWidgets_CONFIG_EXECUTABLE}"
          ${wxWidgets_SELECT_OPTIONS} --cxxflags
        OUTPUT_VARIABLE wxWidgets_CXX_FLAGS
        RESULT_VARIABLE RET
        ERROR_QUIET
        )
      IF(RET EQUAL 0)
        STRING(STRIP "${wxWidgets_CXX_FLAGS}" wxWidgets_CXX_FLAGS)
        SEPARATE_ARGUMENTS(wxWidgets_CXX_FLAGS)

        DBG_MSG_V("wxWidgets_CXX_FLAGS=${wxWidgets_CXX_FLAGS}")

        # parse definitions from cxxflags; drop -D* from CXXFLAGS
        STRING(REGEX MATCHALL "-D[^;]+"
          wxWidgets_DEFINITIONS  "${wxWidgets_CXX_FLAGS}")
        STRING(REGEX REPLACE "-D[^;]+;" ""
          wxWidgets_CXX_FLAGS "${wxWidgets_CXX_FLAGS}")

        # parse include dirs from cxxflags; drop -I prefix
        STRING(REGEX MATCHALL "-I[^;]+"
          wxWidgets_INCLUDE_DIRS "${wxWidgets_CXX_FLAGS}")
        STRING(REGEX REPLACE "-I[^;]+;" ""
          wxWidgets_CXX_FLAGS "${wxWidgets_CXX_FLAGS}")
        STRING(REPLACE "-I" ""
          wxWidgets_INCLUDE_DIRS "${wxWidgets_INCLUDE_DIRS}")

        DBG_MSG_V("wxWidgets_DEFINITIONS=${wxWidgets_DEFINITIONS}")
        DBG_MSG_V("wxWidgets_INCLUDE_DIRS=${wxWidgets_INCLUDE_DIRS}")
        DBG_MSG_V("wxWidgets_CXX_FLAGS=${wxWidgets_CXX_FLAGS}")

      ELSE(RET EQUAL 0)
        SET(wxWidgets_FOUND FALSE)
        DBG_MSG_V(
          "${wxWidgets_CONFIG_EXECUTABLE} --cxxflags FAILED with RET=${RET}")
      ENDIF(RET EQUAL 0)

      # run the wx-config program to get the libs
      # - NOTE: wx-config doesn't verify that the libs requested exist
      #         it just produces the names. Maybe a TRY_COMPILE would
      #         be useful here...
      STRING(REPLACE ";" ","
        wxWidgets_FIND_COMPONENTS "${wxWidgets_FIND_COMPONENTS}")
      EXECUTE_PROCESS(
        COMMAND sh "${wxWidgets_CONFIG_EXECUTABLE}"
          ${wxWidgets_SELECT_OPTIONS} --libs ${wxWidgets_FIND_COMPONENTS}
        OUTPUT_VARIABLE wxWidgets_LIBRARIES
        RESULT_VARIABLE RET
        ERROR_QUIET
        )
      IF(RET EQUAL 0)
        STRING(STRIP "${wxWidgets_LIBRARIES}" wxWidgets_LIBRARIES)
        SEPARATE_ARGUMENTS(wxWidgets_LIBRARIES)
        STRING(REPLACE "-framework;" "-framework "
          wxWidgets_LIBRARIES "${wxWidgets_LIBRARIES}")
        STRING(REPLACE "-arch;" "-arch "
          wxWidgets_LIBRARIES "${wxWidgets_LIBRARIES}")
        STRING(REPLACE "-isysroot;" "-isysroot "
          wxWidgets_LIBRARIES "${wxWidgets_LIBRARIES}")

        # extract linkdirs (-L) for rpath (i.e., LINK_DIRECTORIES)
        STRING(REGEX MATCHALL "-L[^;]+"
          wxWidgets_LIBRARY_DIRS "${wxWidgets_LIBRARIES}")
        STRING(REPLACE "-L" ""
          wxWidgets_LIBRARY_DIRS "${wxWidgets_LIBRARY_DIRS}")

        DBG_MSG_V("wxWidgets_LIBRARIES=${wxWidgets_LIBRARIES}")
        DBG_MSG_V("wxWidgets_LIBRARY_DIRS=${wxWidgets_LIBRARY_DIRS}")

      ELSE(RET EQUAL 0)
        SET(wxWidgets_FOUND FALSE)
        DBG_MSG("${wxWidgets_CONFIG_EXECUTABLE} --libs ${wxWidgets_FIND_COMPONENTS} FAILED with RET=${RET}")
      ENDIF(RET EQUAL 0)
    ENDIF(wxWidgets_CONFIG_EXECUTABLE)

#=====================================================================
# Neither UNIX_STYLE_FIND, nor WIN32_STYLE_FIND
#=====================================================================
  ELSE(UNIX_STYLE_FIND)
    IF(NOT wxWidgets_FIND_QUIETLY)
      MESSAGE(STATUS
        "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}): \n"
        "  Platform unknown/unsupported. It's neither WIN32 nor UNIX "
        "style find."
        )
    ENDIF(NOT wxWidgets_FIND_QUIETLY)
  ENDIF(UNIX_STYLE_FIND)
ENDIF(WIN32_STYLE_FIND)

# Debug output:
DBG_MSG("wxWidgets_FOUND           : ${wxWidgets_FOUND}")
DBG_MSG("wxWidgets_INCLUDE_DIRS    : ${wxWidgets_INCLUDE_DIRS}")
DBG_MSG("wxWidgets_LIBRARY_DIRS    : ${wxWidgets_LIBRARY_DIRS}")
DBG_MSG("wxWidgets_LIBRARIES       : ${wxWidgets_LIBRARIES}")
DBG_MSG("wxWidgets_CXX_FLAGS       : ${wxWidgets_CXX_FLAGS}")
DBG_MSG("wxWidgets_USE_FILE        : ${wxWidgets_USE_FILE}")

#=====================================================================
#=====================================================================
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(wxWidgets DEFAULT_MSG wxWidgets_FOUND)
# Maintain consistency with all other variables.
SET(wxWidgets_FOUND ${WXWIDGETS_FOUND})

#=====================================================================
# Macros for use in wxWidgets apps.
# - This module will not fail to find wxWidgets based on the code
#   below. Hence, it's required to check for validity of:
#
# wxWidgets_wxrc_EXECUTABLE
#=====================================================================

# Resource file compiler.
FIND_PROGRAM(wxWidgets_wxrc_EXECUTABLE wxrc
  ${wxWidgets_ROOT_DIR}/utils/wxrc/vc_msw
  )

# 
# WX_SPLIT_ARGUMENTS_ON(<keyword> <left> <right> <arg1> <arg2> ...)
# 
# Sets <left> and <right> to contain arguments to the left and right,
# respectively, of <keyword>.
# 
# Example usage:
#  FUNCTION(WXWIDGETS_ADD_RESOURCES outfiles)
#    WX_SPLIT_ARGUMENTS_ON(OPTIONS wxrc_files wxrc_options ${ARGN})
#    ...
#  ENDFUNCTION(WXWIDGETS_ADD_RESOURCES)
#
#  WXWIDGETS_ADD_RESOURCES(sources ${xrc_files} OPTIONS -e -o file.C)
# 
# NOTE: This is a generic piece of code that should be renamed to
# SPLIT_ARGUMENTS_ON and put in a file serving the same purpose as
# FindPackageStandardArgs.cmake. At the time of this writing
# FindQt4.cmake has a QT4_EXTRACT_OPTIONS, which I basically copied
# here a bit more generalized. So, there are already two find modules
# using this approach.
#
FUNCTION(WX_SPLIT_ARGUMENTS_ON _keyword _leftvar _rightvar)
  # FIXME: Document that the input variables will be cleared.
  #LIST(APPEND ${_leftvar}  "")
  #LIST(APPEND ${_rightvar} "")
  SET(${_leftvar}  "")
  SET(${_rightvar} "")

  SET(_doing_right FALSE)
  FOREACH(element ${ARGN})
    IF("${element}" STREQUAL "${_keyword}")
      SET(_doing_right TRUE)
    ELSE("${element}" STREQUAL "${_keyword}")
      IF(_doing_right)
        LIST(APPEND ${_rightvar} "${element}")
      ELSE(_doing_right)
        LIST(APPEND ${_leftvar} "${element}")
      ENDIF(_doing_right)
    ENDIF("${element}" STREQUAL "${_keyword}")
  ENDFOREACH(element)

  SET(${_leftvar}  ${${_leftvar}}  PARENT_SCOPE)
  SET(${_rightvar} ${${_rightvar}} PARENT_SCOPE)
ENDFUNCTION(WX_SPLIT_ARGUMENTS_ON)

#
# WX_GET_DEPENDENCIES_FROM_XML(
#   <depends>
#   <match_pattern>
#   <clean_pattern>
#   <xml_contents>
#   <depends_path>
#   )
#
# FIXME: Add documentation here...
#
FUNCTION(WX_GET_DEPENDENCIES_FROM_XML
    _depends
    _match_patt
    _clean_patt
    _xml_contents
    _depends_path
    )

  STRING(REGEX MATCHALL
    ${_match_patt}
    dep_file_list
    "${${_xml_contents}}"
    )
  FOREACH(dep_file ${dep_file_list})
    STRING(REGEX REPLACE ${_clean_patt} "" dep_file "${dep_file}")

    # make the file have an absolute path
    IF(NOT IS_ABSOLUTE "${dep_file}")
      SET(dep_file "${${_depends_path}}/${dep_file}")
    ENDIF(NOT IS_ABSOLUTE "${dep_file}")

    # append file to dependency list
    LIST(APPEND ${_depends} "${dep_file}")
  ENDFOREACH(dep_file)

  SET(${_depends} ${${_depends}} PARENT_SCOPE)
ENDFUNCTION(WX_GET_DEPENDENCIES_FROM_XML)

# 
# WXWIDGETS_ADD_RESOURCES(<sources> <xrc_files>
#                         OPTIONS <options> [NO_CPP_CODE])
# 
# Adds a custom command for resource file compilation of the
# <xrc_files> and appends the output files to <sources>.
# 
# Example usages:
#   WXWIDGETS_ADD_RESOURCES(sources xrc/main_frame.xrc)
#   WXWIDGETS_ADD_RESOURCES(sources ${xrc_files} OPTIONS -e -o altname.cxx)
#
FUNCTION(WXWIDGETS_ADD_RESOURCES _outfiles)
  WX_SPLIT_ARGUMENTS_ON(OPTIONS rc_file_list rc_options ${ARGN})

  # Parse files for dependencies.
  SET(rc_file_list_abs "")
  SET(rc_depends       "")
  FOREACH(rc_file ${rc_file_list})
    GET_FILENAME_COMPONENT(depends_path ${rc_file} PATH)

    GET_FILENAME_COMPONENT(rc_file_abs ${rc_file} ABSOLUTE)
    LIST(APPEND rc_file_list_abs "${rc_file_abs}")

    # All files have absolute paths or paths relative to the location
    # of the rc file.
    FILE(READ "${rc_file_abs}" rc_file_contents)

    # get bitmap/bitmap2 files
    WX_GET_DEPENDENCIES_FROM_XML(
      rc_depends
      "<bitmap[^<]+"
      "^<bitmap[^>]*>"
      rc_file_contents
      depends_path
      )

    # get url files
    WX_GET_DEPENDENCIES_FROM_XML(
      rc_depends
      "<url[^<]+"
      "^<url[^>]*>"
      rc_file_contents
      depends_path
      )

    # get wxIcon files
    WX_GET_DEPENDENCIES_FROM_XML(
      rc_depends
      "<object[^>]*class=\"wxIcon\"[^<]+"
      "^<object[^>]*>"
      rc_file_contents
      depends_path
      )
  ENDFOREACH(rc_file)

  #
  # Parse options.
  # 
  # If NO_CPP_CODE option specified, then produce .xrs file rather
  # than a .cpp file (i.e., don't add the default --cpp-code option).
  LIST(FIND rc_options NO_CPP_CODE index)
  IF(index EQUAL -1)
    LIST(APPEND rc_options --cpp-code)
    # wxrc's default output filename for cpp code.
    SET(outfile resource.cpp)
  ELSE(index EQUAL -1)
    LIST(REMOVE_AT rc_options ${index})
    # wxrc's default output filename for xrs file.
    SET(outfile resource.xrs)
  ENDIF(index EQUAL -1)

  # Get output name for use in ADD_CUSTOM_COMMAND.
  # - short option scanning
  LIST(FIND rc_options -o index)
  IF(NOT index EQUAL -1)
    MATH(EXPR filename_index "${index} + 1")
    LIST(GET rc_options ${filename_index} outfile)
    #LIST(REMOVE_AT rc_options ${index} ${filename_index})
  ENDIF(NOT index EQUAL -1)
  # - long option scanning
  STRING(REGEX MATCH "--output=[^;]*" outfile_opt "${rc_options}")
  IF(outfile_opt)
    STRING(REPLACE "--output=" "" outfile "${outfile_opt}")
  ENDIF(outfile_opt)
  #STRING(REGEX REPLACE "--output=[^;]*;?" "" rc_options "${rc_options}")
  #STRING(REGEX REPLACE ";$" "" rc_options "${rc_options}")
  
  IF(NOT IS_ABSOLUTE "${outfile}")
    SET(outfile "${CMAKE_CURRENT_BINARY_DIR}/${outfile}")
  ENDIF(NOT IS_ABSOLUTE "${outfile}")
  ADD_CUSTOM_COMMAND(
    OUTPUT "${outfile}"
    COMMAND ${wxWidgets_wxrc_EXECUTABLE} ${rc_options} ${rc_file_list_abs}
    DEPENDS ${rc_file_list_abs} ${rc_depends}
    )

  # Add generated header to output file list.
  LIST(FIND rc_options -e short_index)
  LIST(FIND rc_options --extra-cpp-code long_index)
  IF(NOT short_index EQUAL -1 OR NOT long_index EQUAL -1)
    GET_FILENAME_COMPONENT(outfile_ext ${outfile} EXT)
    STRING(REPLACE "${outfile_ext}" ".h" outfile_header "${outfile}")
    LIST(APPEND ${_outfiles} "${outfile_header}")
    SET_SOURCE_FILES_PROPERTIES(
      "${outfile_header}" PROPERTIES GENERATED TRUE
      )
  ENDIF(NOT short_index EQUAL -1 OR NOT long_index EQUAL -1)

  # Add generated file to output file list.
  LIST(APPEND ${_outfiles} "${outfile}")

  SET(${_outfiles} ${${_outfiles}} PARENT_SCOPE)
ENDFUNCTION(WXWIDGETS_ADD_RESOURCES)