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1.1 root 1: # Locate SDL2 library
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 http://www.cmake.org/cmake/project/license.html 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:
66: SET(SDL2_SEARCH_PATHS
67: ~/Library/Frameworks
68: /Library/Frameworks
69: /usr/local
70: /usr
71: /sw # Fink
72: /opt/local # DarwinPorts
73: /opt/csw # Blastwave
74: /opt
75: )
76:
77: FIND_PATH(SDL2_INCLUDE_DIR SDL_scancode.h
78: HINTS
79: $ENV{SDL2DIR}
80: PATH_SUFFIXES include/SDL2 include
81: PATHS ${SDL2_SEARCH_PATHS}
82: )
83:
84: FIND_LIBRARY(SDL2_LIBRARY_TEMP
85: NAMES SDL2
86: HINTS
87: $ENV{SDL2DIR}
88: PATH_SUFFIXES lib64 lib
89: PATHS ${SDL2_SEARCH_PATHS}
90: )
91:
92: IF(NOT SDL2_BUILDING_LIBRARY)
93: IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
94: # Non-OS X framework versions expect you to also dynamically link to
95: # SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms
96: # seem to provide SDL2main for compatibility even though they don't
97: # necessarily need it.
98: FIND_LIBRARY(SDL2MAIN_LIBRARY
99: NAMES SDL2main
100: HINTS
101: $ENV{SDL2DIR}
102: PATH_SUFFIXES lib64 lib
103: PATHS ${SDL2_SEARCH_PATHS}
104: )
105: ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
106: ENDIF(NOT SDL2_BUILDING_LIBRARY)
107:
108: # SDL2 may require threads on your system.
109: # The Apple build may not need an explicit flag because one of the
110: # frameworks may already provide it.
111: # But for non-OSX systems, I will use the CMake Threads package.
112: IF(NOT APPLE)
113: FIND_PACKAGE(Threads)
114: ENDIF(NOT APPLE)
115:
116: # MinGW needs an additional library, mwindows
117: # It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows
118: # (Actually on second look, I think it only needs one of the m* libraries.)
119: IF(MINGW)
120: SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
121: ENDIF(MINGW)
122:
123: IF(SDL2_LIBRARY_TEMP)
124: # For SDL2main
125: IF(NOT SDL2_BUILDING_LIBRARY)
126: IF(SDL2MAIN_LIBRARY)
127: SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP})
128: ENDIF(SDL2MAIN_LIBRARY)
129: ENDIF(NOT SDL2_BUILDING_LIBRARY)
130:
131: # For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa.
132: # CMake doesn't display the -framework Cocoa string in the UI even
133: # though it actually is there if I modify a pre-used variable.
134: # I think it has something to do with the CACHE STRING.
135: # So I use a temporary variable until the end so I can set the
136: # "real" variable in one-shot.
137: IF(APPLE)
138: SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")
139: ENDIF(APPLE)
140:
141: # For threads, as mentioned Apple doesn't need this.
142: # In fact, there seems to be a problem if I used the Threads package
143: # and try using this line, so I'm just skipping it entirely for OS X.
144: IF(NOT APPLE)
145: SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
146: ENDIF(NOT APPLE)
147:
148: # For MinGW library
149: IF(MINGW)
150: SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
151: ENDIF(MINGW)
152:
153: # Set the final string here so the GUI reflects the final state.
154: SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found")
155: # Set the temp variable to INTERNAL so it is not seen in the CMake GUI
156: SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
157: ENDIF(SDL2_LIBRARY_TEMP)
158:
159: if(SDL2_INCLUDE_DIR AND EXISTS "${SDL2_INCLUDE_DIR}/SDL_version.h")
160: file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+[0-9]+$")
161: file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MINOR_VERSION[ \t]+[0-9]+$")
162: file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_PATCHLEVEL[ \t]+[0-9]+$")
163: string(REGEX REPLACE "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MAJOR "${SDL2_VERSION_MAJOR_LINE}")
164: string(REGEX REPLACE "^#define[ \t]+SDL_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MINOR "${SDL2_VERSION_MINOR_LINE}")
165: string(REGEX REPLACE "^#define[ \t]+SDL_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_PATCH "${SDL2_VERSION_PATCH_LINE}")
166: set(SDL2_VERSION_STRING ${SDL2_VERSION_MAJOR}.${SDL2_VERSION_MINOR}.${SDL2_VERSION_PATCH})
167: unset(SDL2_VERSION_MAJOR_LINE)
168: unset(SDL2_VERSION_MINOR_LINE)
169: unset(SDL2_VERSION_PATCH_LINE)
170: unset(SDL2_VERSION_MAJOR)
171: unset(SDL2_VERSION_MINOR)
172: unset(SDL2_VERSION_PATCH)
173: endif()
174:
175: INCLUDE(FindPackageHandleStandardArgs)
176:
177: FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)
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