# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#.rst:
# FindwxWidgets
# -------------
#
# 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 core base ...)
#
# 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.)
#   wxWidgets_EXCLUDE_COMMON_LIBRARIES
#                           - Set to TRUE to exclude linking of
#                             commonly required libs (e.g., png tiff
#                             jpeg zlib regex expat).
#
#
#
# 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
#
#
#
# There is also a wxWidgets_CONFIG_OPTIONS variable for all other
# options that need to be passed to the wx-config utility.  For example,
# to use the base toolkit found in the /usr/local path, set the variable
# (before calling the FIND_PACKAGE command) as such:
#
# ::
#
#   set(wxWidgets_CONFIG_OPTIONS --toolkit=base --prefix=/usr)
#
#
#
# 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. WXUSINGDLL
#   wxWidgets_DEFINITIONS_DEBUG- Contains defines required to compile/link
#                                against WX debug builds, e.g. __WXDEBUG__
#   wxWidgets_CXX_FLAGS        - Include dirs and compiler flags for
#                                unices, empty on WIN32. Essentially
#                                "`wx-config --cxxflags`".
#   wxWidgets_USE_FILE         - Convenience include file.
#
#
#
# Sample usage:
#
# ::
#
#    # Note that for MinGW users the order of libs is important!
#    find_package(wxWidgets COMPONENTS net gl core base)
#    if(wxWidgets_FOUND)
#      include(${wxWidgets_USE_FILE})
#      # and for each of your dependent executable/library targets:
#      target_link_libraries(<YourTarget> ${wxWidgets_LIBRARIES})
#    endif()
#
#
#
# If wxWidgets is required (i.e., not an optional part):
#
# ::
#
#    find_package(wxWidgets REQUIRED net gl core base)
#    include(${wxWidgets_USE_FILE})
#    # and for each of your dependent 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}): ${_MSG}")
endmacro()
macro(DBG_MSG_V _MSG)
#  message(STATUS
#    "${CMAKE_CURRENT_LIST_FILE}(${CMAKE_CURRENT_LIST_LINE}): ${_MSG}")
endmacro()

# 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    "")

# 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()
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()
  set(wxWidgets_USE_FILE UsewxWidgets)
endif()

#=====================================================================
# Determine whether unix or win32 paths should be used
#=====================================================================
if(WIN32 AND NOT CYGWIN AND NOT MSYS AND NOT CMAKE_CROSSCOMPILING)
  set(wxWidgets_FIND_STYLE "win32")
else()
  set(wxWidgets_FIND_STYLE "unix")
endif()

#=====================================================================
# WIN32_FIND_STYLE
#=====================================================================
if(wxWidgets_FIND_STYLE STREQUAL "win32")
  # 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()
      set(wxWidgets_FIND_COMPONENTS core base) # this is default
    endif()
  endif()

  # Add the common (usually required libs) unless
  # wxWidgets_EXCLUDE_COMMON_LIBRARIES has been set.
  if(NOT wxWidgets_EXCLUDE_COMMON_LIBRARIES)
    list(APPEND wxWidgets_FIND_COMPONENTS
      ${wxWidgets_COMMON_LIBRARIES})
  endif()

  #-------------------------------------------------------------------
  # 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()
    string(REGEX MATCH "d$" ${_DBG} "${_CONFIGURATION}")
  endmacro()

  #
  # 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 ${wxWidgets_COMMON_LIBRARIES} scintilla)
      find_library(WX_${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()

    # Find wxWidgets multilib base libraries.
    find_library(WX_base${_DBG}
      NAMES
      wxbase31${_UCD}${_DBG}
      wxbase30${_UCD}${_DBG}
      wxbase29${_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
        wxbase31${_UCD}${_DBG}_${LIB}
        wxbase30${_UCD}${_DBG}_${LIB}
        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()

    # Find wxWidgets monolithic library.
    find_library(WX_mono${_DBG}
      NAMES
      wxmsw${_UNV}31${_UCD}${_DBG}
      wxmsw${_UNV}30${_UCD}${_DBG}
      wxmsw${_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 richtext
                stc ribbon propgrid webview)
      find_library(WX_${LIB}${_DBG}
        NAMES
        wxmsw${_UNV}31${_UCD}${_DBG}_${LIB}
        wxmsw${_UNV}30${_UCD}${_DBG}_${LIB}
        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()
  endmacro()

  #
  # 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()
  # Clear all debug or release library paths (arguments are "d" or "").
  macro(WX_CLEAR_ALL_LIBS _DBG)
    # Clear wxWidgets common libraries.
    foreach(LIB ${wxWidgets_COMMON_LIBRARIES} scintilla)
      WX_CLEAR_LIB(WX_${LIB}${_DBG})
    endforeach()

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

    # 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 richtext
                webview stc ribbon propgrid)
      WX_CLEAR_LIB(WX_${LIB}${_DBG})
    endforeach()
  endmacro()
  # Clear all wxWidgets debug libraries.
  macro(WX_CLEAR_ALL_DBG_LIBS)
    WX_CLEAR_ALL_LIBS("d")
  endmacro()
  # Clear all wxWidgets release libraries.
  macro(WX_CLEAR_ALL_REL_LIBS)
    WX_CLEAR_ALL_LIBS("")
  endmacro()

  #
  # 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()
          DBG_MSG_V("- not found due to missing WX_${LIB}=${WX_${LIB}} or WX_${LIB}d=${WX_${LIB}d}")
          set(wxWidgets_FOUND FALSE)
        endif()
      endforeach()
    else()
      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}${_DBG}})
        else()
          DBG_MSG_V(
            "- not found due to missing WX_${LIB}${_DBG}=${WX_${LIB}${_DBG}}")
          set(wxWidgets_FOUND FALSE)
        endif()
      endforeach()
    endif()

    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()

    list(APPEND wxWidgets_LIBRARIES winmm comctl32 rpcrt4 wsock32)
  endmacro()

  #-------------------------------------------------------------------
  # 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-3.1.0
      wxWidgets-3.0.2
      wxWidgets-3.0.1
      wxWidgets-3.0.0
      wxWidgets-2.9.5
      wxWidgets-2.9.4
      wxWidgets-2.9.3
      wxWidgets-2.9.2
      wxWidgets-2.9.1
      wxWidgets-2.9.0
      wxWidgets-2.8.9
      wxWidgets-2.8.8
      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
      wxWidgets-2.7.1
      wxWidgets-2.7.0
      wxWidgets-2.7.0-1
      wxWidgets-2.6.4
      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()

  if(WX_ROOT_DIR)
    # Select one default tree inside the already determined wx tree.
    # Prefer static/shared order usually consistent with build
    # settings.
    set(_WX_TOOL "")
    set(_WX_TOOLVER "")
    set(_WX_ARCH "")
    if(MINGW)
      set(_WX_TOOL gcc)
    elseif(MSVC)
      set(_WX_TOOL vc)
      if(MSVC14)
        set(_WX_TOOLVER 140)
      elseif(MSVC12)
        set(_WX_TOOLVER 120)
      elseif(MSVC11)
        set(_WX_TOOLVER 110)
      elseif(MSVC10)
        set(_WX_TOOLVER 100)
      elseif(MSVC90)
        set(_WX_TOOLVER 90)
      endif()
      if(CMAKE_SIZEOF_VOID_P EQUAL 8)
        set(_WX_ARCH _x64)
      endif()
    endif()
    if(BUILD_SHARED_LIBS)
      find_path(wxWidgets_LIB_DIR
        NAMES
          msw/wx/setup.h
          mswd/wx/setup.h
          mswu/wx/setup.h
          mswud/wx/setup.h
          mswuniv/wx/setup.h
          mswunivd/wx/setup.h
          mswunivu/wx/setup.h
          mswunivud/wx/setup.h
        PATHS
        ${WX_ROOT_DIR}/lib/${_WX_TOOL}${_WX_TOOLVER}${_WX_ARCH}_dll   # prefer shared
        ${WX_ROOT_DIR}/lib/${_WX_TOOL}${_WX_ARCH}_dll                 # prefer shared
        ${WX_ROOT_DIR}/lib/${_WX_TOOL}${_WX_TOOLVER}${_WX_ARCH}_lib
        ${WX_ROOT_DIR}/lib/${_WX_TOOL}${_WX_ARCH}_lib
        DOC "Path to wxWidgets libraries"
        NO_DEFAULT_PATH
        )
    else()
      find_path(wxWidgets_LIB_DIR
        NAMES
          msw/wx/setup.h
          mswd/wx/setup.h
          mswu/wx/setup.h
          mswud/wx/setup.h
          mswuniv/wx/setup.h
          mswunivd/wx/setup.h
          mswunivu/wx/setup.h
          mswunivud/wx/setup.h
        PATHS
        ${WX_ROOT_DIR}/lib/${_WX_TOOL}${_WX_TOOLVER}${_WX_ARCH}_lib   # prefer static
        ${WX_ROOT_DIR}/lib/${_WX_TOOL}${_WX_ARCH}_lib                 # prefer static
        ${WX_ROOT_DIR}/lib/${_WX_TOOL}${_WX_TOOLVER}${_WX_ARCH}_dll
        ${WX_ROOT_DIR}/lib/${_WX_TOOL}${_WX_ARCH}_dll
        DOC "Path to wxWidgets libraries"
        NO_DEFAULT_PATH
        )
    endif()
    unset(_WX_TOOL)
    unset(_WX_TOOLVER)
    unset(_WX_ARCH)

    # 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()

    if(WX_LIB_DIR)
      # If building shared libs, define WXUSINGDLL to use dllimport.
      if(WX_LIB_DIR MATCHES "[dD][lL][lL]")
        set(wxWidgets_DEFINITIONS WXUSINGDLL)
        DBG_MSG_V("detected SHARED/DLL tree WX_LIB_DIR=${WX_LIB_DIR}")
      endif()

      # 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 ${CFG})
        endif()
      endforeach()
      DBG_MSG_V("WX_CONFIGURATION_LIST=${WX_CONFIGURATION_LIST}")

      if(WX_CONFIGURATION)
        set(wxWidgets_FOUND TRUE)

        # 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()
          set(wxWidgets_CONFIGURATION ${wxWidgets_CONFIGURATION} CACHE STRING
            "Set wxWidgets configuration (${WX_CONFIGURATION_LIST})" FORCE)
        endif()

        # 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()
          # 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()
          set(WX_USE_REL_AND_DBG FALSE)
        endif()

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

        # Set wxWidgets lib setup include directory.
        if(EXISTS ${WX_LIB_DIR}/${wxWidgets_CONFIGURATION}/wx/setup.h)
          set(wxWidgets_INCLUDE_DIRS
            ${WX_LIB_DIR}/${wxWidgets_CONFIGURATION})
        else()
          DBG_MSG("wxWidgets_FOUND FALSE because ${WX_LIB_DIR}/${wxWidgets_CONFIGURATION}/wx/setup.h does not exists.")
          set(wxWidgets_FOUND FALSE)
        endif()

        # Set wxWidgets main include directory.
        if(EXISTS ${WX_ROOT_DIR}/include/wx/wx.h)
          list(APPEND wxWidgets_INCLUDE_DIRS ${WX_ROOT_DIR}/include)
        else()
          DBG_MSG("wxWidgets_FOUND FALSE because WX_ROOT_DIR=${WX_ROOT_DIR} has no ${WX_ROOT_DIR}/include/wx/wx.h")
          set(wxWidgets_FOUND FALSE)
        endif()

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

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

        # Add necessary definitions for unicode builds
        if("${UCD}" STREQUAL "u")
          list(APPEND wxWidgets_DEFINITIONS UNICODE _UNICODE)
        endif()

        # Add necessary definitions for debug builds
        set(wxWidgets_DEFINITIONS_DEBUG _DEBUG __WXDEBUG__)

      endif()
    endif()
  endif()

#=====================================================================
# UNIX_FIND_STYLE
#=====================================================================
else()
  if(wxWidgets_FIND_STYLE STREQUAL "unix")
    #-----------------------------------------------------------------
    # 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}"
          ${wxWidgets_CONFIG_OPTIONS} --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_${_upper_opt_name} ON)
          else()
            set(wxWidgets_DEFAULT_${_upper_opt_name} OFF)
          endif()
        endforeach()
      else()
        foreach(_upper_opt_name DEBUG STATIC UNICODE UNIVERSAL)
          set(wxWidgets_DEFAULT_${_upper_opt_name} OFF)
        endforeach()
      endif()
    endmacro()

    #
    # 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}"
          ${wxWidgets_CONFIG_OPTIONS} --${_OPT_NAME}=yes
        RESULT_VARIABLE _wx_result_yes
        OUTPUT_QUIET
        ERROR_QUIET
        )
      execute_process(
        COMMAND sh "${wxWidgets_CONFIG_EXECUTABLE}"
          ${wxWidgets_CONFIG_OPTIONS} --${_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()
        # 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 ${_OPT_HELP} FORCE)
          else()
            set(wxWidgets_USE_${_UPPER_OPT_NAME} OFF CACHE BOOL ${_OPT_HELP} FORCE)
          endif()
        endif()
      endif()
    endmacro()

    #
    # Set wxWidgets_SELECT_OPTIONS to wx-config options for selecting
    # among multiple builds.
    #
    macro(WX_CONFIG_SELECT_SET_OPTIONS)
      set(wxWidgets_SELECT_OPTIONS ${wxWidgets_CONFIG_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()
            list(APPEND wxWidgets_SELECT_OPTIONS --${_opt_name}=no)
          endif()
        endif()
      endforeach()
    endmacro()

    #-----------------------------------------------------------------
    # UNIX: Start actual work.
    #-----------------------------------------------------------------
    # Support cross-compiling, only search in the target platform.
    find_program(wxWidgets_CONFIG_EXECUTABLE
      NAMES wx-config wx-config-3.1 wx-config-3.0 wx-config-2.9 wx-config-2.8
      DOC "Location of wxWidgets library configuration provider binary (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 and the -D prefix
        string(REGEX MATCHALL "-D[^;]+"
          wxWidgets_DEFINITIONS  "${wxWidgets_CXX_FLAGS}")
        string(REGEX REPLACE "-D[^;]+(;|$)" ""
          wxWidgets_CXX_FLAGS "${wxWidgets_CXX_FLAGS}")
        string(REGEX REPLACE ";$" ""
          wxWidgets_CXX_FLAGS "${wxWidgets_CXX_FLAGS}")
        string(REPLACE "-D" ""
          wxWidgets_DEFINITIONS "${wxWidgets_DEFINITIONS}")

        # 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()
        set(wxWidgets_FOUND FALSE)
        DBG_MSG_V(
          "${wxWidgets_CONFIG_EXECUTABLE} --cxxflags FAILED with RET=${RET}")
      endif()

      # 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()
        set(wxWidgets_FOUND FALSE)
        DBG_MSG("${wxWidgets_CONFIG_EXECUTABLE} --libs ${wxWidgets_FIND_COMPONENTS} FAILED with RET=${RET}")
      endif()
    endif()

    # When using wx-config in MSYS, the include paths are UNIX style paths which may or may
    # not work correctly depending on you MSYS/MinGW configuration.  CMake expects native
    # paths internally.
    if(wxWidgets_FOUND AND MSYS)
      find_program(_cygpath_exe cygpath ONLY_CMAKE_FIND_ROOT_PATH)
      DBG_MSG_V("_cygpath_exe:  ${_cygpath_exe}")
      if(_cygpath_exe)
        set(_tmp_path "")
        foreach(_path ${wxWidgets_INCLUDE_DIRS})
          execute_process(
            COMMAND cygpath -w ${_path}
            OUTPUT_VARIABLE _native_path
            RESULT_VARIABLE _retv
            OUTPUT_STRIP_TRAILING_WHITESPACE
            ERROR_QUIET
            )
          if(_retv EQUAL 0)
            file(TO_CMAKE_PATH ${_native_path} _native_path)
            DBG_MSG_V("Path ${_path} converted to ${_native_path}")
            string(APPEND _tmp_path " ${_native_path}")
          endif()
        endforeach()
        DBG_MSG("Setting wxWidgets_INCLUDE_DIRS = ${_tmp_path}")
        set(wxWidgets_INCLUDE_DIRS ${_tmp_path})
        separate_arguments(wxWidgets_INCLUDE_DIRS)
        list(REMOVE_ITEM wxWidgets_INCLUDE_DIRS "")
      endif()
      unset(_cygpath_exe CACHE)
    endif()

#=====================================================================
# Neither UNIX_FIND_STYLE, nor WIN32_FIND_STYLE
#=====================================================================
  else()
    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 "
        "find style."
        )
    endif()
  endif()
endif()

# Check if a specfic version was requested by find_package().
if(wxWidgets_FOUND)
  find_file(_filename wx/version.h PATHS ${wxWidgets_INCLUDE_DIRS} NO_DEFAULT_PATH)
  dbg_msg("_filename:  ${_filename}")

  if(NOT _filename)
    message(FATAL_ERROR "wxWidgets wx/version.h file not found in ${wxWidgets_INCLUDE_DIRS}.")
  endif()

  file(READ ${_filename} _wx_version_h)

  string(REGEX REPLACE "^(.*\n)?#define +wxMAJOR_VERSION +([0-9]+).*"
    "\\2" wxWidgets_VERSION_MAJOR "${_wx_version_h}" )
  string(REGEX REPLACE "^(.*\n)?#define +wxMINOR_VERSION +([0-9]+).*"
    "\\2" wxWidgets_VERSION_MINOR "${_wx_version_h}" )
  string(REGEX REPLACE "^(.*\n)?#define +wxRELEASE_NUMBER +([0-9]+).*"
    "\\2" wxWidgets_VERSION_PATCH "${_wx_version_h}" )
  set(wxWidgets_VERSION_STRING
    "${wxWidgets_VERSION_MAJOR}.${wxWidgets_VERSION_MINOR}.${wxWidgets_VERSION_PATCH}" )
  dbg_msg("wxWidgets_VERSION_STRING:    ${wxWidgets_VERSION_STRING}")
endif()

# 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(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)

find_package_handle_standard_args(wxWidgets
  REQUIRED_VARS wxWidgets_LIBRARIES wxWidgets_INCLUDE_DIRS
  VERSION_VAR   wxWidgets_VERSION_STRING
  )

#=====================================================================
# 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
  DOC "Location of wxWidgets resource file compiler binary (wxrc)"
  )

#
# 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(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()
      if(_doing_right)
        list(APPEND ${_rightvar} "${element}")
      else()
        list(APPEND ${_leftvar} "${element}")
      endif()
    endif()
  endforeach()

  set(${_leftvar}  ${${_leftvar}}  PARENT_SCOPE)
  set(${_rightvar} ${${_rightvar}} PARENT_SCOPE)
endfunction()

#
# 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()

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

  set(${_depends} ${${_depends}} PARENT_SCOPE)
endfunction()

#
# 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()

  #
  # 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()
    list(REMOVE_AT rc_options ${index})
    # wxrc's default output filename for xrs file.
    set(outfile resource.xrs)
  endif()

  # 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} ${filename_index})
  endif()
  # - long option scanning
  string(REGEX MATCH "--output=[^;]*" outfile_opt "${rc_options}")
  if(outfile_opt)
    string(REPLACE "--output=" "" outfile "${outfile_opt}")
  endif()
  #string(REGEX REPLACE "--output=[^;]*;?" "" rc_options "${rc_options}")
  #string(REGEX REPLACE ";$" "" rc_options "${rc_options}")

  if(NOT IS_ABSOLUTE "${outfile}")
    set(outfile "${CMAKE_CURRENT_BINARY_DIR}/${outfile}")
  endif()
  add_custom_command(
    OUTPUT "${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()

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

  set(${_outfiles} ${${_outfiles}} PARENT_SCOPE)
endfunction()
