3 # SDL_LIBRARY, the name of the library to link against
4 # SDL_FOUND, if false, do not try to link to SDL
5 # SDL_INCLUDE_DIR, where to find SDL.h
7 # This module responds to the the flag:
9 # If this is defined, then no SDL_main 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 SDL_LIBRARY variable.
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 -lSDLmain 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.
21 # Additional Note: If you see an empty SDL_LIBRARY_TEMP in your configuration
22 # and no SDL_LIBRARY, it means CMake did not find your SDL library
23 # (SDL.dll, libsdl.so, SDL.framework, etc).
24 # Set SDL_LIBRARY_TEMP to point to your SDL library, and configure again.
25 # Similarly, if you see an empty SDLMAIN_LIBRARY, you should set this value
26 # as appropriate. These values are used to generate the final SDL_LIBRARY
27 # variable, but when these values are unset, SDL_LIBRARY does not get created.
30 # $SDLDIR is an environment variable that would
31 # correspond to the ./configure --prefix=$SDLDIR
32 # used in building SDL.
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 SDLmain 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.
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 # SDL_LIBRARY to override this selection or set the CMake environment
48 # CMAKE_INCLUDE_PATH to modify the search paths.
50 # Note that the header path has changed from SDL/SDL.h to just SDL.h
51 # This needed to change because "proper" SDL convention
52 # is #include "SDL.h", not <SDL/SDL.h>. This is done for portability
53 # reasons because not all systems place things in SDL/ (see FreeBSD).
55 FIND_PATH(SDL_INCLUDE_DIR SDL.h
58 PATH_SUFFIXES include/SDL include
62 /usr/local/include/SDL12
63 /usr/local/include/SDL11 # FreeBSD ports
67 /opt/local # DarwinPorts
71 #MESSAGE("SDL_INCLUDE_DIR is ${SDL_INCLUDE_DIR}")
73 # SDL-1.1 is the name used by FreeBSD ports...
74 # don't confuse it for the version number.
75 FIND_LIBRARY(SDL_LIBRARY_TEMP
79 PATH_SUFFIXES lib64 lib
87 #MESSAGE("SDL_LIBRARY_TEMP is ${SDL_LIBRARY_TEMP}")
89 IF(NOT SDL_BUILDING_LIBRARY)
90 IF(NOT ${SDL_INCLUDE_DIR} MATCHES ".framework")
91 # Non-OS X framework versions expect you to also dynamically link to
92 # SDLmain. This is mainly for Windows and OS X. Other (Unix) platforms
93 # seem to provide SDLmain for compatibility even though they don't
94 # necessarily need it.
95 FIND_LIBRARY(SDLMAIN_LIBRARY
96 NAMES SDLmain SDLmain-1.1
99 PATH_SUFFIXES lib64 lib
106 ENDIF(NOT ${SDL_INCLUDE_DIR} MATCHES ".framework")
107 ENDIF(NOT SDL_BUILDING_LIBRARY)
109 # SDL may require threads on your system.
110 # The Apple build may not need an explicit flag because one of the
111 # frameworks may already provide it.
112 # But for non-OSX systems, I will use the CMake Threads package.
114 FIND_PACKAGE(Threads)
117 # MinGW needs an additional library, mwindows
118 # It's total link flags should look like -lmingw32 -lSDLmain -lSDL -lmwindows
119 # (Actually on second look, I think it only needs one of the m* libraries.)
121 SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
127 IF(NOT SDL_BUILDING_LIBRARY)
129 SET(SDL_LIBRARY_TEMP ${SDLMAIN_LIBRARY} ${SDL_LIBRARY_TEMP})
130 ENDIF(SDLMAIN_LIBRARY)
131 ENDIF(NOT SDL_BUILDING_LIBRARY)
133 # For OS X, SDL 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.
140 SET(SDL_LIBRARY_TEMP ${SDL_LIBRARY_TEMP} "-framework Cocoa")
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.
147 SET(SDL_LIBRARY_TEMP ${SDL_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
152 SET(SDL_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL_LIBRARY_TEMP})
155 # Set the final string here so the GUI reflects the final state.
156 SET(SDL_LIBRARY ${SDL_LIBRARY_TEMP} CACHE STRING "Where the SDL Library can be found")
157 # Set the temp variable to INTERNAL so it is not seen in the CMake GUI
158 SET(SDL_LIBRARY_TEMP "${SDL_LIBRARY_TEMP}" CACHE INTERNAL "")
161 ENDIF(SDL_LIBRARY_TEMP)
163 #MESSAGE("SDL_LIBRARY is ${SDL_LIBRARY}")