1 # Locate SDL2 library |
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2 # This module defines |
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3 # SDL2_LIBRARIES, the name of the library to link against |
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4 # SDL2_FOUND, if false, do not try to link to SDL2 |
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5 # SDL2_INCLUDE_DIR, where to find SDL.h |
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6 # |
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7 # This module responds to the the flag: |
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8 # SDL2_BUILDING_LIBRARY |
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9 # If this is defined, then no SDL2main will be linked in because |
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10 # only applications need main(). |
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11 # Otherwise, it is assumed you are building an application and this |
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12 # module will attempt to locate and set the the proper link flags |
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13 # as part of the returned SDL2_LIBRARIES variable. |
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14 # |
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15 # Don't forget to include SDLmain.h and SDLmain.m your project for the |
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16 # OS X framework based version. (Other versions link to -lSDL2main which |
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17 # this module will try to find on your behalf.) Also for OS X, this |
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18 # module will automatically add the -framework Cocoa on your behalf. |
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19 # |
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20 # |
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21 # Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration |
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22 # and no SDL2_LIBRARIES, it means CMake did not find your SDL2 library |
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23 # (SDL2.dll, libsdl2.so, SDL2.framework, etc). |
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24 # Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again. |
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25 # Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value |
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26 # as appropriate. These values are used to generate the final SDL2_LIBRARIES |
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27 # variable, but when these values are unset, SDL2_LIBRARIES does not get created. |
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28 # |
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29 # |
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30 # $SDL2DIR is an environment variable that would |
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31 # correspond to the ./configure --prefix=$SDL2DIR |
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32 # used in building SDL2. |
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33 # l.e.galup 9-20-02 |
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34 # |
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35 # Modified by Eric Wing. |
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36 # Added code to assist with automated building by using environmental variables |
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37 # and providing a more controlled/consistent search behavior. |
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38 # Added new modifications to recognize OS X frameworks and |
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39 # additional Unix paths (FreeBSD, etc). |
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40 # Also corrected the header search path to follow "proper" SDL guidelines. |
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41 # Added a search for SDL2main which is needed by some platforms. |
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42 # Added a search for threads which is needed by some platforms. |
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43 # Added needed compile switches for MinGW. |
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44 # |
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45 # On OSX, this will prefer the Framework version (if found) over others. |
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46 # People will have to manually change the cache values of |
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47 # SDL2_LIBRARIES to override this selection or set the CMake environment |
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48 # CMAKE_INCLUDE_PATH to modify the search paths. |
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49 # |
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50 # Note that the header path has changed from SDL2/SDL.h to just SDL.h |
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51 # This needed to change because "proper" SDL convention |
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52 # is #include "SDL.h", not <SDL2/SDL.h>. This is done for portability |
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53 # reasons because not all systems place things in SDL2/ (see FreeBSD). |
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54 |
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55 #============================================================================= |
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56 # Copyright 2003-2009 Kitware, Inc. |
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57 # |
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58 # Distributed under the OSI-approved BSD License (the "License"); |
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59 # see accompanying file Copyright.txt for details. |
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60 # |
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61 # This software is distributed WITHOUT ANY WARRANTY; without even the |
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62 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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63 # See the License for more information. |
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64 #============================================================================= |
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65 # (To distribute this file outside of CMake, substitute the full |
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66 # License text for the above reference.) |
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67 |
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68 SET(SDL2_SEARCH_PATHS |
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69 ~/Library/Frameworks |
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70 /Library/Frameworks |
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71 /usr/local |
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72 /usr |
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73 /sw # Fink |
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74 /opt/local # DarwinPorts |
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75 /opt/csw # Blastwave |
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76 /opt |
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77 ) |
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78 |
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79 FIND_PATH(SDL2_INCLUDE_DIRS SDL.h |
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80 HINTS |
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81 $ENV{SDL2DIR} |
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82 PATH_SUFFIXES include/SDL2 include |
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83 PATHS ${SDL2_SEARCH_PATHS} |
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84 ) |
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85 |
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86 FIND_LIBRARY(SDL2_LIBRARY_TEMP |
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87 NAMES SDL2 |
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88 HINTS |
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89 $ENV{SDL2DIR} |
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90 PATH_SUFFIXES lib64 lib |
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91 PATHS ${SDL2_SEARCH_PATHS} |
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92 ) |
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93 |
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94 IF(NOT SDL2_BUILDING_LIBRARY) |
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95 IF(NOT ${SDL2_INCLUDE_DIRS} MATCHES ".framework") |
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96 # Non-OS X framework versions expect you to also dynamically link to |
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97 # SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms |
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98 # seem to provide SDL2main for compatibility even though they don't |
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99 # necessarily need it. |
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100 FIND_LIBRARY(SDL2MAIN_LIBRARY |
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101 NAMES SDL2main |
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102 HINTS |
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103 $ENV{SDL2DIR} |
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104 PATH_SUFFIXES lib64 lib |
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105 PATHS ${SDL2_SEARCH_PATHS} |
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106 ) |
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107 ENDIF(NOT ${SDL2_INCLUDE_DIRS} MATCHES ".framework") |
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108 ENDIF(NOT SDL2_BUILDING_LIBRARY) |
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109 |
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110 # SDL2 may require threads on your system. |
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111 # The Apple build may not need an explicit flag because one of the |
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112 # frameworks may already provide it. |
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113 # But for non-OSX systems, I will use the CMake Threads package. |
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114 IF(NOT APPLE) |
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115 FIND_PACKAGE(Threads) |
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116 ENDIF(NOT APPLE) |
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117 |
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118 # MinGW needs an additional library, mwindows |
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119 # It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows |
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120 # (Actually on second look, I think it only needs one of the m* libraries.) |
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121 IF(MINGW) |
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122 SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW") |
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123 ENDIF(MINGW) |
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124 |
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125 IF(SDL2_LIBRARY_TEMP) |
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126 # For SDL2main |
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127 IF(NOT SDL2_BUILDING_LIBRARY) |
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128 IF(SDL2MAIN_LIBRARY) |
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129 SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP}) |
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130 ENDIF(SDL2MAIN_LIBRARY) |
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131 ENDIF(NOT SDL2_BUILDING_LIBRARY) |
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132 |
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133 # For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa. |
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134 # CMake doesn't display the -framework Cocoa string in the UI even |
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135 # though it actually is there if I modify a pre-used variable. |
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136 # I think it has something to do with the CACHE STRING. |
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137 # So I use a temporary variable until the end so I can set the |
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138 # "real" variable in one-shot. |
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139 IF(APPLE) |
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140 SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa") |
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141 ENDIF(APPLE) |
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142 |
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143 # For threads, as mentioned Apple doesn't need this. |
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144 # In fact, there seems to be a problem if I used the Threads package |
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145 # and try using this line, so I'm just skipping it entirely for OS X. |
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146 IF(NOT APPLE) |
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147 SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT}) |
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148 ENDIF(NOT APPLE) |
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149 |
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150 # For MinGW library |
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151 IF(MINGW) |
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152 SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP}) |
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153 ENDIF(MINGW) |
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154 |
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155 # Set the final string here so the GUI reflects the final state. |
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156 SET(SDL2_LIBRARIES ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found") |
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157 # Set the temp variable to INTERNAL so it is not seen in the CMake GUI |
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158 SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "") |
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159 ENDIF(SDL2_LIBRARY_TEMP) |
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160 |
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161 if(BUILD_ENGINE_JS) |
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162 set(SDL2_LIBRARIES "sdl2_emscripten_internal" CACHE STRING "emscripten override" FORCE) |
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163 set(SDL2_INCLUDE_DIRS "${CMAKE_SYSTEM_INCLUDE_PATH}/SDL" CACHE STRING "emscripten override" FORCE) |
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164 endif() |
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165 |
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166 INCLUDE(FindPackageHandleStandardArgs) |
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167 |
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168 FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARIES SDL2_INCLUDE_DIRS) |
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169 |
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