Subversion Repositories s80186

# This module defines

# SDL2_LIBRARY, the name of the library to link against

# SDL2_FOUND, if false, do not try to link to SDL2

# SDL2_INCLUDE_DIR, where to find SDL.h

#

# This module responds to the the flag:

# SDL2_BUILDING_LIBRARY

# If this is defined, then no SDL2main will be linked in because

# only applications need main().

# Otherwise, it is assumed you are building an application and this

# module will attempt to locate and set the the proper link flags

# as part of the returned SDL2_LIBRARY variable.

#

# Don't forget to include SDLmain.h and SDLmain.m your project for the

# OS X framework based version. (Other versions link to -lSDL2main which

# this module will try to find on your behalf.) Also for OS X, this

# module will automatically add the -framework Cocoa on your behalf.

#

#

# Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration

# and no SDL2_LIBRARY, it means CMake did not find your SDL2 library

# (SDL2.dll, libsdl2.so, SDL2.framework, etc).

# Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again.

# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value

# as appropriate. These values are used to generate the final SDL2_LIBRARY

# variable, but when these values are unset, SDL2_LIBRARY does not get created.

#

#

# $SDL2DIR is an environment variable that would

# correspond to the ./configure --prefix=$SDL2DIR

# used in building SDL2.

# l.e.galup  9-20-02

#

# Modified by Eric Wing.

# Added code to assist with automated building by using environmental variables

# and providing a more controlled/consistent search behavior.

# Added new modifications to recognize OS X frameworks and

# additional Unix paths (FreeBSD, etc).

# Also corrected the header search path to follow "proper" SDL guidelines.

# Added a search for SDL2main which is needed by some platforms.

# Added a search for threads which is needed by some platforms.

# Added needed compile switches for MinGW.

#

# On OSX, this will prefer the Framework version (if found) over others.

# People will have to manually change the cache values of

# SDL2_LIBRARY to override this selection or set the CMake environment

# CMAKE_INCLUDE_PATH to modify the search paths.

#

# Note that the header path has changed from SDL2/SDL.h to just SDL.h

# This needed to change because "proper" SDL convention

# is #include "SDL.h", not . This is done for portability

# reasons because not all systems place things in SDL2/ (see FreeBSD).

#=============================================================================

# CMake - Cross Platform Makefile Generator

# Copyright 2000-2016 Kitware, Inc.

# Copyright 2000-2011 Insight Software Consortium

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

# * Redistributions of source code must retain the above copyright

#   notice, this list of conditions and the following disclaimer.

#

# * Redistributions in binary form must reproduce the above copyright

#   notice, this list of conditions and the following disclaimer in the

#   documentation and/or other materials provided with the distribution.

#

# * Neither the names of Kitware, Inc., the Insight Software Consortium,

#   nor the names of their contributors may be used to endorse or promote

#   products derived from this software without specific prior written

#   permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#

# ------------------------------------------------------------------------------

#

# The above copyright and license notice applies to distributions of

# CMake in source and binary form.  Some source files contain additional

# notices of original copyright by their contributors; see each source

# for details.  Third-party software packages supplied with CMake under

# compatible licenses provide their own copyright notices documented in

# corresponding subdirectories.

#

# ------------------------------------------------------------------------------

#

# CMake was initially developed by Kitware with the following sponsorship:

#

#  * National Library of Medicine at the National Institutes of Health

#    as part of the Insight Segmentation and Registration Toolkit (ITK).

#

#  * US National Labs (Los Alamos, Livermore, Sandia) ASC Parallel

#    Visualization Initiative.

#

#  * National Alliance for Medical Image Computing (NAMIC) is funded by the

#    National Institutes of Health through the NIH Roadmap for Medical Research,

#    Grant U54 EB005149.

#

#  * Kitware, Inc.

#=============================================================================

SET(SDL2_SEARCH_PATHS

        ~/Library/Frameworks

        /Library/Frameworks

        /usr/local

        /usr

        /sw # Fink

        /opt/local # DarwinPorts

        /opt/csw # Blastwave

        /opt

        ${SDL2_PATH}

)

FIND_PATH(SDL2_INCLUDE_DIR SDL.h

        HINTS

        $ENV{SDL2DIR}

        PATH_SUFFIXES include/SDL2 include

        PATHS ${SDL2_SEARCH_PATHS}

)

FIND_LIBRARY(SDL2_LIBRARY_TEMP

        NAMES SDL2

        HINTS

        $ENV{SDL2DIR}

        PATH_SUFFIXES lib64 lib

        PATHS ${SDL2_SEARCH_PATHS}

)

IF(NOT SDL2_BUILDING_LIBRARY)

        IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")

                # Non-OS X framework versions expect you to also dynamically link to

                # SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms

                # seem to provide SDL2main for compatibility even though they don't

                # necessarily need it.

                FIND_LIBRARY(SDL2MAIN_LIBRARY

                        NAMES SDL2main

                        HINTS

                        $ENV{SDL2DIR}

                        PATH_SUFFIXES lib64 lib

                        PATHS ${SDL2_SEARCH_PATHS}

                )

        ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")

ENDIF(NOT SDL2_BUILDING_LIBRARY)

# SDL2 may require threads on your system.

# The Apple build may not need an explicit flag because one of the

# frameworks may already provide it.

# But for non-OSX systems, I will use the CMake Threads package.

IF(NOT APPLE)

        FIND_PACKAGE(Threads)

ENDIF(NOT APPLE)

# MinGW needs an additional library, mwindows

# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows

# (Actually on second look, I think it only needs one of the m* libraries.)

IF(MINGW)

        SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")

ENDIF(MINGW)

IF(SDL2_LIBRARY_TEMP)

        # For SDL2main

        IF(NOT SDL2_BUILDING_LIBRARY)

                IF(SDL2MAIN_LIBRARY)

                        SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP})

                ENDIF(SDL2MAIN_LIBRARY)

        ENDIF(NOT SDL2_BUILDING_LIBRARY)

        # For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa.

        # CMake doesn't display the -framework Cocoa string in the UI even

        # though it actually is there if I modify a pre-used variable.

        # I think it has something to do with the CACHE STRING.

        # So I use a temporary variable until the end so I can set the

        # "real" variable in one-shot.

        IF(APPLE)

                SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")

        ENDIF(APPLE)

        # For threads, as mentioned Apple doesn't need this.

        # In fact, there seems to be a problem if I used the Threads package

        # and try using this line, so I'm just skipping it entirely for OS X.

        IF(NOT APPLE)

                SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})

        ENDIF(NOT APPLE)

        # For MinGW library

        IF(MINGW)

                SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})

        ENDIF(MINGW)

        # Set the final string here so the GUI reflects the final state.

        SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found")

        # Set the temp variable to INTERNAL so it is not seen in the CMake GUI

        SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")

ENDIF(SDL2_LIBRARY_TEMP)

INCLUDE(FindPackageHandleStandardArgs)

FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)