94 lines
3.4 KiB
CMake
94 lines
3.4 KiB
CMake
# - Locate SDL library
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find_path(SDL2_INCLUDE_DIR SDL.h
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HINTS
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ENV SDLDIR
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PATH_SUFFIXES include/SDL2 include
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)
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find_library(SDL2_LIBRARY_TEMP
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NAMES SDL2
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HINTS
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ENV SDLDIR
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PATH_SUFFIXES lib
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)
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find_library(SDL2main_LIBRARY
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NAMES SDL2main
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HINTS
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ENV SDLDIR
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PATH_SUFFIXES lib
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)
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# SDL may require threads on your system.
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# The Apple build may not need an explicit flag because one of the
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# frameworks may already provide it.
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# But for non-OSX systems, I will use the CMake Threads package.
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if(NOT APPLE)
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find_package(Threads)
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endif()
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# MinGW needs an additional library, mwindows
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# It's total link flags should look like -lmingw32 -lSDLmain -lSDL -lmwindows
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# (Actually on second look, I think it only needs one of the m* libraries.)
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if(MINGW)
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set(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
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endif()
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if(SDL2_LIBRARY_TEMP)
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# For OS X, SDL uses Cocoa as a backend so it must link to Cocoa.
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# CMake doesn't display the -framework Cocoa string in the UI even
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# though it actually is there if I modify a pre-used variable.
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# I think it has something to do with the CACHE STRING.
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# So I use a temporary variable until the end so I can set the
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# "real" variable in one-shot.
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if(APPLE)
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set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")
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endif()
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# For threads, as mentioned Apple doesn't need this.
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# In fact, there seems to be a problem if I used the Threads package
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# and try using this line, so I'm just skipping it entirely for OS X.
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if(NOT APPLE)
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set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
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endif()
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# For MinGW library
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if(MINGW)
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set(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
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endif()
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# Set the final string here so the GUI reflects the final state.
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set(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL Library can be found")
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# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
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set(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
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endif()
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if(SDL2_INCLUDE_DIR AND EXISTS "${SDL2_INCLUDE_DIR}/SDL_version.h")
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file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+[0-9]+$")
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file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MINOR_VERSION[ \t]+[0-9]+$")
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file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_PATCHLEVEL[ \t]+[0-9]+$")
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string(REGEX REPLACE "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL_VERSION_MAJOR "${SDL_VERSION_MAJOR_LINE}")
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string(REGEX REPLACE "^#define[ \t]+SDL_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL_VERSION_MINOR "${SDL_VERSION_MINOR_LINE}")
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string(REGEX REPLACE "^#define[ \t]+SDL_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL_VERSION_PATCH "${SDL_VERSION_PATCH_LINE}")
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set(SDL_VERSION_STRING ${SDL_VERSION_MAJOR}.${SDL_VERSION_MINOR}.${SDL_VERSION_PATCH})
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unset(SDL_VERSION_MAJOR_LINE)
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unset(SDL_VERSION_MINOR_LINE)
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unset(SDL_VERSION_PATCH_LINE)
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unset(SDL_VERSION_MAJOR)
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unset(SDL_VERSION_MINOR)
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unset(SDL_VERSION_PATCH)
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set(SDL2_FOUND TRUE)
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endif()
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if (SDL2_FOUND)
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if (NOT SDL2_FIND_QUIETLY)
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MESSAGE( STATUS "sdl2 found: includes in ${SDL2_INCLUDE_DIR}, library in ${SDL2_LIBRARY}")
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endif (NOT SDL2_FIND_QUIETLY)
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else (THEORA_FOUND)
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if (SDL2_FIND_REQUIRED)
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MESSAGE( FATAL_ERROR "sdl2 not found")
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endif (SDL2_FIND_REQUIRED)
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endif (SDL2_FOUND)
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MARK_AS_ADVANCED(SDL2_INCLUDE_DIR SDL2_LIBRARY SDL2main_LIBRARY)
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