1# SDL2_LIBRARIES, the name of the library to link against
  2# SDL2_FOUND, if false, do not try to link to SDL2
  3# SDL2_INCLUDE_DIRS, where to find SDL.h
  4#
  5# Don't forget to include SDLmain.h and SDLmain.m your project for the
  6# OS X framework based version. (Other versions link to -lSDL2main which
  7# this module will try to find on your behalf.) Also for OS X, this
  8# module will automatically add the -framework Cocoa on your behalf.
  9#
 10#
 11# Additional Note: If you see an empty SDL2_LIBRARIES_TEMP in your configuration
 12# and no SDL2_LIBRARIES, it means CMake did not find your SDL2 library
 13# (SDL2.dll, libsdl2.so, SDL2.framework, etc).
 14# Set SDL2_LIBRARIES_TEMP to point to your SDL2 library, and configure again.
 15# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value
 16# as appropriate. These values are used to generate the final SDL2_LIBRARIES
 17# variable, but when these values are unset, SDL2_LIBRARIES does not get created.
 18#
 19#
 20# $SDL2DIR is an environment variable that would
 21# correspond to the ./configure --prefix=$SDL2DIR
 22# used in building SDL2.
 23# l.e.galup  9-20-02
 24#
 25# Modified by Eric Wing.
 26# Added code to assist with automated building by using environmental variables
 27# and providing a more controlled/consistent search behavior.
 28# Added new modifications to recognize OS X frameworks and
 29# additional Unix paths (FreeBSD, etc).
 30# Also corrected the header search path to follow "proper" SDL guidelines.
 31# Added a search for SDL2main which is needed by some platforms.
 32# Added a search for threads which is needed by some platforms.
 33# Added needed compile switches for MinGW.
 34#
 35# On OSX, this will prefer the Framework version (if found) over others.
 36# People will have to manually change the cache values of
 37# SDL2_LIBRARIES to override this selection or set the CMake environment
 38# CMAKE_INCLUDE_PATH to modify the search paths.
 39#
 40# Note that the header path has changed from SDL2/SDL.h to just SDL.h
 41# This needed to change because "proper" SDL convention
 42# is #include "SDL.h", not <SDL2/SDL.h>. This is done for portability
 43# reasons because not all systems place things in SDL2/ (see FreeBSD).
 44#
 45#=========================================================================
 46#
 47# Copyright (c) 1993-2015 Ken Martin, Will Schroeder, Bill Lorensen
 48# All rights reserved.
 49#
 50# Redistribution and use in source and binary forms, with or without
 51# modification, are permitted provided that the following conditions are met:
 52#
 53# * Redistributions of source code must retain the above copyright notice,
 54#   this list of conditions and the following disclaimer.
 55#
 56# * Redistributions in binary form must reproduce the above copyright notice,
 57#   this list of conditions and the following disclaimer in the documentation
 58#   and/or other materials provided with the distribution.
 59#
 60# * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
 61#   of any contributors may be used to endorse or promote products derived
 62#   from this software without specific prior written permission.
 63#
 64# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
 65# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 66# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 67# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
 68# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 69# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 70# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 71# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 72# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 73# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 74#
 75#=========================================================================
 76#
 77SET(SDL2_SEARCH_PATHS
 78  ~/Library/Frameworks
 79  /Library/Frameworks
 80  /usr/local
 81  /usr
 82  /sw # Fink
 83  /opt/local # DarwinPorts
 84  /opt/csw # Blastwave
 85  /opt
 86  ${SDL2_PATH}
 87)
 88
 89FIND_PATH(SDL2_INCLUDE_DIRS SDL.h
 90  HINTS
 91  $ENV{SDL2DIR}
 92  PATH_SUFFIXES include/SDL2 include
 93  PATHS ${SDL2_SEARCH_PATHS} ${SDL2_LIBRARIES_TEMP}/../..
 94)
 95
 96FIND_LIBRARY(SDL2_LIBRARIES_TEMP
 97  NAMES SDL2
 98  HINTS
 99  $ENV{SDL2DIR}
100  PATH_SUFFIXES lib64 lib
101  PATHS ${SDL2_SEARCH_PATHS} ${SDL2_INCLUDE_DIRS}/../..
102)
103
104IF(NOT ${SDL2_INCLUDE_DIRS} MATCHES ".framework")
105  # Non-OS X framework versions expect you to also dynamically link to
106  # SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms
107  # seem to provide SDL2main for compatibility even though they don't
108  # necessarily need it.
109  FIND_LIBRARY(SDL2MAIN_LIBRARY
110    NAMES SDL2main
111    HINTS
112    $ENV{SDL2DIR}
113    PATH_SUFFIXES lib64 lib
114    PATHS ${SDL2_SEARCH_PATHS}
115  )
116ENDIF(NOT ${SDL2_INCLUDE_DIRS} MATCHES ".framework")
117
118# SDL2 may require threads on your system.
119# The Apple build may not need an explicit flag because one of the
120# frameworks may already provide it.
121# But for non-OSX systems, I will use the CMake Threads package.
122IF(NOT APPLE)
123  FIND_PACKAGE(Threads)
124ENDIF(NOT APPLE)
125
126# MinGW needs an additional library, mwindows
127# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows
128# (Actually on second look, I think it only needs one of the m* libraries.)
129IF(MINGW)
130  SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
131ENDIF(MINGW)
132
133IF(SDL2_LIBRARIES_TEMP)
134  # For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa.
135  # CMake doesn't display the -framework Cocoa string in the UI even
136  # though it actually is there if I modify a pre-used variable.
137  # I think it has something to do with the CACHE STRING.
138  # So I use a temporary variable until the end so I can set the
139  # "real" variable in one-shot.
140  IF(APPLE)
141    SET(SDL2_LIBRARIES_TEMP ${SDL2_LIBRARIES_TEMP} "-framework Cocoa")
142  ENDIF(APPLE)
143
144  # For threads, as mentioned Apple doesn't need this.
145  # In fact, there seems to be a problem if I used the Threads package
146  # and try using this line, so I'm just skipping it entirely for OS X.
147  IF(NOT APPLE)
148    SET(SDL2_LIBRARIES_TEMP ${SDL2_LIBRARIES_TEMP} ${CMAKE_THREAD_LIBS_INIT})
149  ENDIF(NOT APPLE)
150
151  # For MinGW library
152  IF(MINGW)
153    SET(SDL2_LIBRARIES_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARIES_TEMP})
154  ENDIF(MINGW)
155
156  # Set the final string here so the GUI reflects the final state.
157  SET(SDL2_LIBRARIES ${SDL2_LIBRARIES_TEMP} CACHE STRING "Where the SDL2 Library can be found")
158  # Set the temp variable to INTERNAL so it is not seen in the CMake GUI
159  SET(SDL2_LIBRARIES_TEMP "${SDL2_LIBRARIES_TEMP}" CACHE INTERNAL "")
160ENDIF(SDL2_LIBRARIES_TEMP)
161
162INCLUDE(FindPackageHandleStandardArgs)
163
164FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARIES SDL2_INCLUDE_DIRS)