[CMake] new FindwxWidgets.cmake + UsewxWidgets.cmake

Jan Woetzel jw at mip.informatik.uni-kiel.de
Mon Jun 26 07:14:49 EDT 2006


Hi,
Miguel A. Figueroa-Villanueva and I rewrote the find script for 
wxWidgets (formerly known as wxWindows).
The work is based on Jorgen Boddes FindwxWin.


Improvements include :
- use wxWidgets instead of deprecated wxWindows variable names
- Windows linking against wx static and shared(DLL) works,
- Debug and Release in one MSVS configuration works,
- monolithic and multilib wx builds are handled correctly,
- the user can specify his required subset of required libraries fo 
rmultilib build (instead of monolithic).
- easy maintainment for future wx versions because it`s macro based.

We use+tested the script internally on Linux + Windows (static+shared) x 
(Debug,Release) with our internal Dart Dashboards.

The convenience UsewxWIdgets.cmake script is backward compatible.
The FindwxWidgets.cmake script is not backward compatible because of 
variabel name change (WXWINDOWS_* -> WXWIDGETS_* )

I wrote the FindwxWindows in current CMake distribution and suggest:
- put Find+USe for wxWidgets into CMake CVS Modules directory (see the 
attached files),
- keep the Find+Use wxWindows script as they are for backward 
compatibility.

What do you think?

Jan.

-- 

  Dipl.-Ing. Jan Woetzel
--------------------------------------------------
  University of Kiel
  Institute of Computer Science and Applied Mathematics
  Hermann-Rodewald-Str. 3 [room 310]
  24098 Kiel/Germany
--------------------------------------------------
  Phone +49-431-880-4477
  Fax   +49-431-880-4054
  Mob.  +49-179-2937346
--------------------------------------------------
  Url   www.mip.informatik.uni-kiel.de/~jw
  Email jw at mip.informatik.uni-kiel.de

-------------- next part --------------
# - Convenience include for using wxWidgets 
# Finds if wxWidgets is installed 
# and set the appropriate libs, incdirs, flags etc. 
# INCLUDE_DIRECTORIES, LINK_DIRECTORIES and ADD_DEFINITIONS
# are called.
#
# USAGE
# Include this file inside your CMakeLists.txt:
#   SET(WXWIDGETS_USE_GL 1) # optionally set this is you need wxgl
#   INCLUDE(${CMAKE_MODULE_PATH}/UsewxWidgsts.cmake)
#
# AUTHOR
# Jan Woetzel <jw -at- mip.informatik.uni-kiel.de>


# debug message and logging. 
# uncomment these 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)

#
# set wx libs we depend on. 
# "std" libs is only supporte dby linux
# emulate "std" behavior here.
#
IF   (WIN32)
  # useful std wx libs 
  # workaround until Find script supports std libs with wx msw  mono and multi build 
  SET(WXWIDGETS_LIBS_STD
    expat regex 
    jpeg png tiff zlib  
    # xml net adv media html odbc xrc
    )
  MSG("WXWIDGETS_LIBS_STD=${WXWIDGETS_LIBS_STD}")
  
  # use mono instead of multilib build?
  OPTION(WXWIDGETS_USE_MONOLITHIC "use monolithic WX USE_LIBS etting  for build?" OFF)
  #MARK_AS_ADVANCED(WXWIDGETS_USE_MONOLITHIC)
  MSG("WXWIDGETS_USE_MONOLITHIC=${WXWIDGETS_USE_MONOLITHIC}")
  
  IF   (WXWIDGETS_USE_MONOLITHIC)
    SET(WXWIDGETS_USE_LIBS ${WXWIDGETS_USE_LIBS}  
      mono 
      ${WXWIDGETS_LIBS_STD} )
    MSG("selected MONOLITHIC WX")
  ELSE (WXWIDGETS_USE_MONOLITHIC)
    SET(WXWIDGETS_USE_LIBS ${WXWIDGETS_USE_LIBS}  
      base core
      ${WXWIDGETS_LIBS_STD} )
    MSG("selected MULTILIB WX")
  ENDIF(WXWIDGETS_USE_MONOLITHIC)
ELSE (WIN32)
  # use wx std libs
  SET(WXWIDGETS_USE_LIBS ${WXWIDGETS_USE_LIBS} std)
ENDIF(WIN32)

# check WXWIDGETS and WXWINDOWS for backward compatibility 
#OPTION(WXWIDGETS_USE_GL "use wxgl lib with wxWidgets?" OFF)
IF   (WXWIDGETS_USE_GL OR WXWINDOWS_USE_GL)
  SET(WXWIDGETS_USE_LIBS ${WXWIDGETS_USE_LIBS} gl)
ENDIF(WXWIDGETS_USE_GL OR WXWINDOWS_USE_GL)


#
# start the find script with the above settings 
#
FIND_PACKAGE(wxWidgets REQUIRED)

#
# add results
#
MSG("WXWIDGETS_FOUND=${WXWIDGETS_FOUND}")
IF(   WXWIDGETS_FOUND)
  IF   (WXWIDGETS_INCLUDE_DIR)
    INCLUDE_DIRECTORIES( ${WXWIDGETS_INCLUDE_DIR} )
    MSG("WXWIDGETS_INCLUDE_DIR=${WXWIDGETS_INCLUDE_DIR}")
  ENDIF(WXWIDGETS_INCLUDE_DIR)

  IF   (WXWIDGETS_LINK_DIRECTORIES)
    LINK_DIRECTORIES(${WXWIDGETS_LINK_DIRECTORIES})
    MSG("WXWIDGETS_LINK_DIRECTORIES=${WXWIDGETS_LINK_DIRECTORIES}")
  ENDIF(WXWIDGETS_LINK_DIRECTORIES)

  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)

  IF   (WXWIDGETS_DEFINITIONS)
    ADD_DEFINITIONS( ${WXWIDGETS_DEFINITIONS} )
    MSG("WXWIDGETS_DEFINITIONS=${WXWIDGETS_DEFINITIONS}")
  ENDIF(WXWIDGETS_DEFINITIONS)  

  # 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}")
    FILE(APPEND ${LOGFILE} "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}):   ${WXWIDGETS_LIBRARIES}\n")    
  ENDIF(WXWIDGETS_LIBRARIES)


ELSE (WXWIDGETS_FOUND)
  MESSAGE("wxWidgest requested but not found.")
ENDIF(WXWIDGETS_FOUND) 
-------------- next part --------------
# - Find a wxWidgets (a.k.a., wxWindows) installation.
# This module finds if wxWidgets is installed and selects a default
# configuration to use.
#
# The following variables are searched for and set to defaults in case
# of multiple choices. Change them if the defaults are not desired:
#
#  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.)
#  WXWIDGETS_USE_LIBS      - Libraries to use besides the common
#                            required ones; set to base and core by
#                            default.
#
# The following are set after configuration is done:
#
#  WXWIDGETS_FOUND            - Set to TRUE if wxWidgets was found.
#  WXWIDGETS_INCLUDE_DIR      - 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_LINK_DIRECTORIES - 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`".
#
# Sample usage:
#
#   SET(WXWIDGETS_USE_LIBS base core gl net)
#   FIND_PACKAGE(wxWidgets)
#   IF(WXWIDGETS_FOUND)
#     MESSAGE(STATUS "Found wxWidgets!")
#     IF   (WXWIDGETS_INCLUDE_DIR)
#       INCLUDE_DIRECTORIES(${WXWIDGETS_INCLUDE_DIR})
#     ENDIF(WXWIDGETS_INCLUDE_DIR)
#     IF   (WXWIDGETS_LINK_DIRECTORIES)
#       LINK_DIRECTORIES(${WXWIDGETS_LINK_DIRECTORIES})
#     ENDIF(WXWIDGETS_LINK_DIRECTORIES)
#     IF   (WXWIDGETS_CXX_FLAGS)
#       SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WXWIDGETS_CXX_FLAGS}")
#     ENDIF(WXWIDGETS_CXX_FLAGS)
#     IF   (WXWIDGETS_DEFINITIONS)
#       ADD_DEFINITIONS(${WXWIDGETS_DEFINITIONS})
#     ENDIF(WXWIDGETS_DEFINITIONS)
#     # and for each of your dependant executable/library targets:
#     TARGET_LINK_LIBRARIES(target ${WXWIDGETS_LIBRARIES})
#   ENDIF(WXWIDGETS_FOUND)
# 
# Sample usage with monolithic wx build:
#   SET(WXWIDGETS_USE_LIBS msw26 expat jpeg gl png regex tiff zlib)
#   ...
#
# NOTES
#   See UsewxWidgets.cmake for a convenience interface
# 
#   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), and Jorgen Bodde (FindwxWin.cmake).

#
# TODO/wish list (Jan Woetzel)
#
# (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.

#
# Helper macro to control the debugging output globally.
# - NOTE: This and all the DBG_MSG calls should be removed after the
#         module stabilizes.
#
MACRO(DBG_MSG _MSG)
  # MESSAGE(STATUS "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}): ${_MSG}")
ENDMACRO(DBG_MSG)

#
# Clear return values in case the module is loaded more than once.
#
SET(WXWIDGETS_FOUND FALSE)
#
SET(WXWIDGETS_INCLUDE_DIR      "")
SET(WXWIDGETS_LIBRARIES        "")
SET(WXWIDGETS_LINK_DIRECTORIES "")
SET(WXWIDGETS_CXX_FLAGS        "")

#=====================================================================
#=====================================================================
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)


IF(WIN32_STYLE_FIND)

  #---------------------------------------------------------------------
  # 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("m_unv = ${_UNV}")
    DBG_MSG("m_ucd = ${_UCD}")
    DBG_MSG("m_dbg = ${_DBG}")

    # Find wxWidgets common libraries
    FOREACH(LIB png tiff jpeg zlib regex expat)
      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${_DBG}
      NAMES
        wxbase26${_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
          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}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 html media xrc dbgrid gl qa)
      FIND_LIBRARY(WX_${LIB}${_DBG}
        NAMES
          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 png tiff jpeg zlib regex expat)
      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 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)
    IF(WX_USE_REL_AND_DBG)
      DBG_MSG("looking for ${${_LIBS}}")
      FOREACH(LIB ${${_LIBS}})
        DBG_MSG("Finding ${LIB} and ${LIB}d")
        DBG_MSG("WX_${LIB}  : ${WX_${LIB}}")
        DBG_MSG("WX_${LIB}d : ${WX_${LIB}d}")
        IF(WX_${LIB} AND WX_${LIB}d)
          DBG_MSG("Found ${LIB} and ${LIB}d")
          SET(WXWIDGETS_LIBRARIES ${WXWIDGETS_LIBRARIES}
            debug     ${WX_${LIB}d}
            optimized ${WX_${LIB}}
            )
        ELSE(WX_${LIB} AND WX_${LIB}d)
          DBG_MSG("- 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("Finding ${LIB}${_DBG}")
        DBG_MSG("WX_${LIB}${_DBG} : ${WX_${LIB}${_DBG}}")
        IF(WX_${LIB}${_DBG})
          DBG_MSG("Found ${LIB}${_DBG}")
          SET(WXWIDGETS_LIBRARIES ${WXWIDGETS_LIBRARIES}
            ${WX_${LIB}${_DBG}}
            )
        ELSE(WX_${LIB}${_DBG})
          DBG_MSG("- not found due to missing WX_${LIB}${_DBG}=${WX_${LIB}${_DBG}}")
          SET(WXWIDGETS_FOUND FALSE)
        ENDIF(WX_${LIB}${_DBG})
      ENDFOREACH(LIB)
    ENDIF(WX_USE_REL_AND_DBG)

    FOREACH(LIB ${${_LIBS}})
      DBG_MSG("required: ${LIB}")
      IF(LIB STREQUAL "gl")
        DBG_MSG("gl required: ${LIB}")
        SET(WXWIDGETS_LIBRARIES ${WXWIDGETS_LIBRARIES}
          opengl32
          glu32
          )
      ENDIF(LIB STREQUAL "gl")
    ENDFOREACH(LIB ${${_LIBS}})

    SET(WXWIDGETS_LIBRARIES ${WXWIDGETS_LIBRARIES}
      winmm
      comctl32
      rpcrt4
      wsock32
      )
  ENDMACRO(WX_SET_LIBRARIES)

  #---------------------------------------------------------------------
  # WIN32: Start actual work.
  #---------------------------------------------------------------------
  #
  # Look for an installation tree.
  #
  FIND_PATH(WXWIDGETS_ROOT_DIR include/wx/wx.h
    $ENV{WXWIN}
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\wxWidgets_is1;Inno Setup: App Path]"  ## WX 2.6.x
    C:/wxWidgets-2.6.3
    D:/wxWidgets-2.6.3
    C:/wxWidgets-2.6.2
    D:/wxWidgets-2.6.2
    C:/wxWidgets-2.6.1
    D:/wxWidgets-2.6.1
    C:/wxWidgets-2.6.0
    D:/wxWidgets-2.6.0
    C:/wxWidgets-2.5.5
    D:/wxWidgets-2.5.5
    C:/wxWidgets-2.5.4
    D:/wxWidgets-2.5.4
    C:/wxWidgets-2.5.3
    D:/wxWidgets-2.5.3
    C:/wxWidgets-2.5.2
    D:/wxWidgets-2.5.2
    C:/wxWidgets-2.5.1
    D:/wxWidgets-2.5.1
    DOC "wxWidgets base/installation directory?"
    )

  # If WXWIDGETS_ROOT_DIR changed, clear all libraries and lib dir.
  IF(NOT WX_ROOT_DIR STREQUAL WXWIDGETS_ROOT_DIR)
    SET(WX_ROOT_DIR ${WXWIDGETS_ROOT_DIR} CACHE INTERNAL "WXWIDGETS_ROOT_DIR")
    #  WX_CLEAR_ALL_DBG_LIBS()
    #  WX_CLEAR_ALL_REL_LIBS()
    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)

    # *** Temporary hack for cmake 2.2-patch3 and older.
    #     FIND_PATH(<VAR> NAMES ... PATHS ...) not available
    # ***
    # JW: 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
      #  NO_DEFAULT_PATH
      #  )
      IF(NOT WXWIDGETS_LIB_DIR AND EXISTS ${WX_ROOT_DIR}/lib/vc_dll)
        SET(WXWIDGETS_LIB_DIR ${WX_ROOT_DIR}/lib/vc_dll CACHE PATH "Path to wxWidgets libraries." FORCE)
      ENDIF(NOT WXWIDGETS_LIB_DIR AND EXISTS ${WX_ROOT_DIR}/lib/vc_dll)
      IF(NOT WXWIDGETS_LIB_DIR AND EXISTS ${WX_ROOT_DIR}/lib/vc_lib)
        SET(WXWIDGETS_LIB_DIR ${WX_ROOT_DIR}/lib/vc_lib CACHE PATH "Path to wxWidgets libraries." FORCE)
      ENDIF(NOT WXWIDGETS_LIB_DIR AND EXISTS ${WX_ROOT_DIR}/lib/vc_lib)
    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
      #  NO_DEFAULT_PATH
      #  )
      IF(NOT WXWIDGETS_LIB_DIR AND EXISTS ${WX_ROOT_DIR}/lib/vc_lib)
        SET(WXWIDGETS_LIB_DIR ${WX_ROOT_DIR}/lib/vc_lib CACHE PATH "Path to wxWidgets libraries." FORCE)
      ENDIF(NOT WXWIDGETS_LIB_DIR AND EXISTS ${WX_ROOT_DIR}/lib/vc_lib)
      IF(NOT WXWIDGETS_LIB_DIR AND EXISTS ${WX_ROOT_DIR}/lib/vc_dll)
        SET(WXWIDGETS_LIB_DIR ${WX_ROOT_DIR}/lib/vc_dll CACHE PATH "Path to wxWidgets libraries." FORCE)
      ENDIF(NOT WXWIDGETS_LIB_DIR AND EXISTS ${WX_ROOT_DIR}/lib/vc_dll)
    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(WX_LIB_DIR MATCHES ".*[dD][lL][lL].*")
        DBG_MSG("detected SHARED/DLL tree WX_LIB_DIR=${WX_LIB_DIR}")
        # add define for correct dllimport to link against WX DLL
        SET(WXWIDGETS_DEFINITIONS "-DWXUSINGDLL")
      ENDIF(WX_LIB_DIR MATCHES ".*[dD][lL][lL].*")
      
      #---------------------------------------------------------------------
      # WIN32: ???
      #---------------------------------------------------------------------
      # Search for possible configuration type availabilities
      # ***** SET(WX_LAST_CFG "")
      FOREACH(CFG mswunivud mswunivd mswud mswd mswunivu mswuniv mswu msw)
        SET(WX_${CFG}_FOUND FALSE)
        IF(EXISTS ${WX_LIB_DIR}/${CFG})
          SET(WX_CONFIGURATION_LIST ${WX_CONFIGURATION_LIST} ${CFG})
          SET(WX_${CFG}_FOUND TRUE)
          SET(WX_CONFIGURATION ${CFG})
        ENDIF(EXISTS ${WX_LIB_DIR}/${CFG})
      ENDFOREACH(CFG)

      # ***** SET(WX_USE_REL_AND_DBG FALSE)
      IF(WX_CONFIGURATION)
        # if selected configuration wasn't found, force the default one
        # else, use it but still force a refresh for the list in doc string
        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 was 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, force it to 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_DIR ${WX_ROOT_DIR}/include)
        ELSE(EXISTS ${WX_ROOT_DIR}/include/wx/wx.h)
          DBG_MSG("WXWIDGET_FOUND FALSE because WX_ROOT_DIR=${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)
          SET(WXWIDGETS_INCLUDE_DIR ${WXWIDGETS_INCLUDE_DIR}
            ${WX_LIB_DIR}/${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_PATH(WX_SETUP_INCLUDE_DIR wx/setup.h
          #          ${WX_LIB_DIR}/${WXWIDGETS_CONFIGURATION})
        #MARK_AS_ADVANCED(WX_SETUP_INCLUDE_DIR)

        # 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)

        # Libraries we are interested in.
        IF(WXWIDGETS_USE_LIBS)
          # Add the common required libs.
          SET(WXWIDGETS_USE_LIBS ${WXWIDGETS_USE_LIBS}
            png tiff jpeg zlib regex expat
            )
        ELSE(WXWIDGETS_USE_LIBS)
          # Default minimal use setting (i.e., link to only core and base).
          SET(WXWIDGETS_USE_LIBS base core
            png tiff jpeg zlib regex expat
            )
        ENDIF(WXWIDGETS_USE_LIBS)

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

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


  #=====================================================================
  #=====================================================================
ELSE(WIN32_STYLE_FIND)
  IF(UNIX_STYLE_FIND)

    FIND_PROGRAM(WXWIDGETS_CONFIG_EXE wx-config)
    IF(WXWIDGETS_CONFIG_EXE)
      SET(WXWIDGETS_FOUND TRUE)

      # run the wx-config program to get cxxflags
      EXEC_PROGRAM(${WXWIDGETS_CONFIG_EXE}
        ARGS "--cxxflags"
        OUTPUT_VARIABLE WXWIDGETS_CXX_FLAGS
        RETURN_VALUE RET)
      IF(NOT RET EQUAL 0)
        SET(WXWIDGETS_FOUND FALSE)
      ENDIF(NOT 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_USE_LIBS "${WXWIDGETS_USE_LIBS}")
      STRING(REGEX REPLACE ";" "," WXWIDGETS_USE_LIBS "${WXWIDGETS_USE_LIBS}")
      EXEC_PROGRAM(${WXWIDGETS_CONFIG_EXE}
        ARGS "--libs ${WXWIDGETS_USE_LIBS}"
        OUTPUT_VARIABLE WXWIDGETS_LIBRARIES
        RETURN_VALUE RET)
      IF(RET EQUAL 0)
        SEPARATE_ARGUMENTS(WXWIDGETS_LIBRARIES)
        STRING(REGEX REPLACE "-framework;" "-framework "
          WXWIDGETS_LIBRARIES
          "${WXWIDGETS_LIBRARIES}")

        # extract linkdirs (-L) for rpath (i.e., LINK_DIRECTORIES)
        STRING(REGEX MATCHALL "[-][L][^ ;]+"
          WXWIDGETS_LINK_DIRECTORIES
          "${WXWIDGETS_LIBRARIES}")
        STRING(REGEX REPLACE "[-][L]" ""
          WXWIDGETS_LINK_DIRECTORIES
          "${WXWIDGETS_LINK_DIRECTORIES}")
      ELSE(RET EQUAL 0)
        SET(WXWIDGETS_FOUND FALSE)
      ENDIF(RET EQUAL 0)
    ENDIF(WXWIDGETS_CONFIG_EXE)
    
  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)

DBG_MSG("WXWIDGETS_FOUND      : ${WXWIDGETS_FOUND}"      )
DBG_MSG("WXWIDGETS_INCLUDE_DIR: ${WXWIDGETS_INCLUDE_DIR}")
DBG_MSG("WXWIDGETS_LIBRARIES  : ${WXWIDGETS_LIBRARIES}"  )
DBG_MSG("WXWIDGETS_LINK_DIRECTORIES: ${WXWIDGETS_LINK_DIRECTORIES}")
DBG_MSG("WXWIDGETS_CXX_FLAGS       : ${WXWIDGETS_CXX_FLAGS}"       )

#=====================================================================
#=====================================================================
IF(NOT WXWIDGETS_FOUND)
  # make FIND_PACKAGE friendly
  IF(NOT wxWidgets_FIND_QUIETLY)
    IF(wxWidgets_FIND_REQUIRED)
      MESSAGE(FATAL_ERROR
        "wxWidgets required, please specify it's location.")
    ELSE(wxWidgets_FIND_REQUIRED)
      MESSAGE(STATUS "ERROR: wxWidgets was not found.")
    ENDIF(wxWidgets_FIND_REQUIRED)
  ENDIF(NOT wxWidgets_FIND_QUIETLY)
ENDIF(NOT WXWIDGETS_FOUND)


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