# Locate SDL2 library# This module defines# SDL2_LIBRARIES, 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_LIBRARIES 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_LIBRARIES, 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_LIBRARIES# variable, but when these values are unset, SDL2_LIBRARIES 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_LIBRARIES 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 <SDL2/SDL.h>. This is done for portability# reasons because not all systems place things in SDL2/ (see FreeBSD).#=============================================================================# Copyright 2003-2009 Kitware, Inc.## Distributed under the OSI-approved BSD License (the "License");# see accompanying file Copyright.txt for details.## This software is distributed WITHOUT ANY WARRANTY; without even the# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.# See the License for more information.#=============================================================================# (To distribute this file outside of CMake, substitute the full# License text for the above reference.)SET(SDL2_SEARCH_PATHS ~/Library/Frameworks /Library/Frameworks /usr/local /usr /sw # Fink /opt/local # DarwinPorts /opt/csw # Blastwave /opt)FIND_PATH(SDL2_INCLUDE_DIRS 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_DIRS} 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_DIRS} 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_LIBRARIES ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found") # Set the temp variable to INTERNAL so it is not seen in the CMake GUI SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")ENDIF(SDL2_LIBRARY_TEMP)if(BUILD_ENGINE_JS) set(SDL2_LIBRARIES "sdl2_emscripten_internal" CACHE STRING "emscripten override" FORCE) set(SDL2_INCLUDE_DIRS "${CMAKE_SYSTEM_INCLUDE_PATH}/SDL" CACHE STRING "emscripten override" FORCE)endif()INCLUDE(FindPackageHandleStandardArgs)FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARIES SDL2_INCLUDE_DIRS)