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| 1 | + |
| 2 | +# This module defines |
| 3 | +# SDL2_LIBRARY, the name of the library to link against |
| 4 | +# SDL2_FOUND, if false, do not try to link to SDL2 |
| 5 | +# SDL2_INCLUDE_DIR, where to find SDL.h |
| 6 | +# |
| 7 | +# This module responds to the the flag: |
| 8 | +# SDL2_BUILDING_LIBRARY |
| 9 | +# If this is defined, then no SDL2main will be linked in because |
| 10 | +# only applications need main(). |
| 11 | +# Otherwise, it is assumed you are building an application and this |
| 12 | +# module will attempt to locate and set the the proper link flags |
| 13 | +# as part of the returned SDL2_LIBRARY variable. |
| 14 | +# |
| 15 | +# Don't forget to include SDLmain.h and SDLmain.m your project for the |
| 16 | +# OS X framework based version. (Other versions link to -lSDL2main which |
| 17 | +# this module will try to find on your behalf.) Also for OS X, this |
| 18 | +# module will automatically add the -framework Cocoa on your behalf. |
| 19 | +# |
| 20 | +# |
| 21 | +# Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration |
| 22 | +# and no SDL2_LIBRARY, it means CMake did not find your SDL2 library |
| 23 | +# (SDL2.dll, libsdl2.so, SDL2.framework, etc). |
| 24 | +# Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again. |
| 25 | +# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value |
| 26 | +# as appropriate. These values are used to generate the final SDL2_LIBRARY |
| 27 | +# variable, but when these values are unset, SDL2_LIBRARY does not get created. |
| 28 | +# |
| 29 | +# |
| 30 | +# $SDL2DIR is an environment variable that would |
| 31 | +# correspond to the ./configure --prefix=$SDL2DIR |
| 32 | +# used in building SDL2. |
| 33 | +# l.e.galup 9-20-02 |
| 34 | +# |
| 35 | +# Modified by Eric Wing. |
| 36 | +# Added code to assist with automated building by using environmental variables |
| 37 | +# and providing a more controlled/consistent search behavior. |
| 38 | +# Added new modifications to recognize OS X frameworks and |
| 39 | +# additional Unix paths (FreeBSD, etc). |
| 40 | +# Also corrected the header search path to follow "proper" SDL guidelines. |
| 41 | +# Added a search for SDL2main which is needed by some platforms. |
| 42 | +# Added a search for threads which is needed by some platforms. |
| 43 | +# Added needed compile switches for MinGW. |
| 44 | +# |
| 45 | +# On OSX, this will prefer the Framework version (if found) over others. |
| 46 | +# People will have to manually change the cache values of |
| 47 | +# SDL2_LIBRARY to override this selection or set the CMake environment |
| 48 | +# CMAKE_INCLUDE_PATH to modify the search paths. |
| 49 | +# |
| 50 | +# Note that the header path has changed from SDL2/SDL.h to just SDL.h |
| 51 | +# This needed to change because "proper" SDL convention |
| 52 | +# is #include "SDL.h", not <SDL2/SDL.h>. This is done for portability |
| 53 | +# reasons because not all systems place things in SDL2/ (see FreeBSD). |
| 54 | + |
| 55 | +#============================================================================= |
| 56 | +# Copyright 2003-2009 Kitware, Inc. |
| 57 | +# |
| 58 | +# Distributed under the OSI-approved BSD License (the "License"); |
| 59 | +# see accompanying file Copyright.txt for details. |
| 60 | +# |
| 61 | +# This software is distributed WITHOUT ANY WARRANTY; without even the |
| 62 | +# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 63 | +# See the License for more information. |
| 64 | +#============================================================================= |
| 65 | +# (To distribute this file outside of CMake, substitute the full |
| 66 | +# License text for the above reference.) |
| 67 | + |
| 68 | +SET(SDL2_SEARCH_PATHS |
| 69 | + ~/Library/Frameworks |
| 70 | + /Library/Frameworks |
| 71 | + /usr/local |
| 72 | + /usr |
| 73 | + /sw # Fink |
| 74 | + /opt/local # DarwinPorts |
| 75 | + /opt/csw # Blastwave |
| 76 | + /opt |
| 77 | +) |
| 78 | + |
| 79 | +FIND_PATH(SDL2_INCLUDE_DIR SDL.h |
| 80 | + HINTS |
| 81 | + $ENV{SDL2DIR} |
| 82 | + PATH_SUFFIXES include/SDL2 include |
| 83 | + PATHS ${SDL2_SEARCH_PATHS} |
| 84 | +) |
| 85 | + |
| 86 | +FIND_LIBRARY(SDL2_LIBRARY_TEMP |
| 87 | + NAMES SDL2 |
| 88 | + HINTS |
| 89 | + $ENV{SDL2DIR} |
| 90 | + PATH_SUFFIXES lib64 lib |
| 91 | + PATHS ${SDL2_SEARCH_PATHS} |
| 92 | +) |
| 93 | + |
| 94 | +IF(NOT SDL2_BUILDING_LIBRARY) |
| 95 | + IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework") |
| 96 | + # Non-OS X framework versions expect you to also dynamically link to |
| 97 | + # SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms |
| 98 | + # seem to provide SDL2main for compatibility even though they don't |
| 99 | + # necessarily need it. |
| 100 | + FIND_LIBRARY(SDL2MAIN_LIBRARY |
| 101 | + NAMES SDL2main |
| 102 | + HINTS |
| 103 | + $ENV{SDL2DIR} |
| 104 | + PATH_SUFFIXES lib64 lib |
| 105 | + PATHS ${SDL2_SEARCH_PATHS} |
| 106 | + ) |
| 107 | + ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework") |
| 108 | +ENDIF(NOT SDL2_BUILDING_LIBRARY) |
| 109 | + |
| 110 | +# SDL2 may require threads on your system. |
| 111 | +# The Apple build may not need an explicit flag because one of the |
| 112 | +# frameworks may already provide it. |
| 113 | +# But for non-OSX systems, I will use the CMake Threads package. |
| 114 | +IF(NOT APPLE) |
| 115 | + FIND_PACKAGE(Threads) |
| 116 | +ENDIF(NOT APPLE) |
| 117 | + |
| 118 | +# MinGW needs an additional library, mwindows |
| 119 | +# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows |
| 120 | +# (Actually on second look, I think it only needs one of the m* libraries.) |
| 121 | +IF(MINGW) |
| 122 | + SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW") |
| 123 | +ENDIF(MINGW) |
| 124 | + |
| 125 | +IF(SDL2_LIBRARY_TEMP) |
| 126 | + # For SDL2main |
| 127 | + IF(NOT SDL2_BUILDING_LIBRARY) |
| 128 | + IF(SDL2MAIN_LIBRARY) |
| 129 | + SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP}) |
| 130 | + ENDIF(SDL2MAIN_LIBRARY) |
| 131 | + ENDIF(NOT SDL2_BUILDING_LIBRARY) |
| 132 | + |
| 133 | + # For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa. |
| 134 | + # CMake doesn't display the -framework Cocoa string in the UI even |
| 135 | + # though it actually is there if I modify a pre-used variable. |
| 136 | + # I think it has something to do with the CACHE STRING. |
| 137 | + # So I use a temporary variable until the end so I can set the |
| 138 | + # "real" variable in one-shot. |
| 139 | + IF(APPLE) |
| 140 | + SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa") |
| 141 | + ENDIF(APPLE) |
| 142 | + |
| 143 | + # For threads, as mentioned Apple doesn't need this. |
| 144 | + # In fact, there seems to be a problem if I used the Threads package |
| 145 | + # and try using this line, so I'm just skipping it entirely for OS X. |
| 146 | + IF(NOT APPLE) |
| 147 | + SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT}) |
| 148 | + ENDIF(NOT APPLE) |
| 149 | + |
| 150 | + # For MinGW library |
| 151 | + IF(MINGW) |
| 152 | + SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP}) |
| 153 | + ENDIF(MINGW) |
| 154 | + |
| 155 | + # Set the final string here so the GUI reflects the final state. |
| 156 | + SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found") |
| 157 | + # Set the temp variable to INTERNAL so it is not seen in the CMake GUI |
| 158 | + SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "") |
| 159 | +ENDIF(SDL2_LIBRARY_TEMP) |
| 160 | + |
| 161 | +INCLUDE(FindPackageHandleStandardArgs) |
| 162 | + |
| 163 | +FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR) |
| 164 | + |
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