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Co-authored-by: Gergely Gombos <[email protected]>
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| # Distributed under the OSI-approved BSD 3-Clause License. See accompanying | ||
| # file Copyright.txt or https://cmake.org/licensing for details. | ||
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| #.rst: | ||
| # FindSDL2 | ||
| # ------- | ||
| # | ||
| # Locate SDL2 library | ||
| # | ||
| # This module defines | ||
| # | ||
| # :: | ||
| # | ||
| # SDL2_LIBRARY, the name of the library to link against | ||
| # SDL2_FOUND, if false, do not try to link to SDL | ||
| # SDL2_INCLUDE_DIR, where to find SDL.h | ||
| # SDL2_VERSION_STRING, human-readable string containing the version of SDL | ||
| # | ||
| # | ||
| # | ||
| # This module responds to the flag: | ||
| # | ||
| # :: | ||
| # | ||
| # SDL2_BUILDING_LIBRARY | ||
| # If this is defined, then no SDL2_main will be linked in because | ||
| # only applications need main(). | ||
| # Otherwise, it is assumed you are building an application and this | ||
| # module will attempt to locate and set the proper link flags | ||
| # as part of the returned SDL2_LIBRARY variable. | ||
| # | ||
| # | ||
| # | ||
| # Don't forget to include SDLmain.h and SDLmain.m your project for the | ||
| # OS X framework based version. (Other versions link to -lSDLmain which | ||
| # this module will try to find on your behalf.) Also for OS X, this | ||
| # module will automatically add the -framework Cocoa on your behalf. | ||
| # | ||
| # | ||
| # | ||
| # Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your | ||
| # configuration and no SDL2_LIBRARY, it means CMake did not find your SDL | ||
| # library (SDL.dll, libsdl.so, SDL.framework, etc). Set | ||
| # SDL2_LIBRARY_TEMP to point to your SDL library, and configure again. | ||
| # Similarly, if you see an empty SDLMAIN_LIBRARY, you should set this | ||
| # value as appropriate. These values are used to generate the final | ||
| # SDL2_LIBRARY variable, but when these values are unset, SDL2_LIBRARY | ||
| # does not get created. | ||
| # | ||
| # | ||
| # | ||
| # $SDL2DIR is an environment variable that would correspond to the | ||
| # ./configure --prefix=$SDL2DIR used in building SDL. l.e.galup 9-20-02 | ||
| # | ||
| # Modified by Eric Wing. Added code to assist with automated building | ||
| # by using environmental variables and providing a more | ||
| # controlled/consistent search behavior. Added new modifications to | ||
| # recognize OS X frameworks and additional Unix paths (FreeBSD, etc). | ||
| # Also corrected the header search path to follow "proper" SDL | ||
| # guidelines. Added a search for SDLmain which is needed by some | ||
| # platforms. Added a search for threads which is needed by some | ||
| # platforms. Added needed compile switches for MinGW. | ||
| # | ||
| # On OSX, this will prefer the Framework version (if found) over others. | ||
| # People will have to manually change the cache values of SDL2_LIBRARY to | ||
| # override this selection or set the CMake environment | ||
| # CMAKE_INCLUDE_PATH to modify the search paths. | ||
| # | ||
| # Note that the header path has changed from SDL/SDL.h to just SDL.h | ||
| # This needed to change because "proper" SDL convention is #include | ||
| # "SDL.h", not <SDL/SDL.h>. This is done for portability reasons | ||
| # because not all systems place things in SDL/ (see FreeBSD). | ||
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| if(NOT SDL2_DIR) | ||
| set(SDL2_DIR "" CACHE PATH "SDL2 directory") | ||
| endif() | ||
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| # modified to SDL2/ prefix | ||
| find_path(SDL2_INCLUDE_DIR SDL2/SDL.h | ||
| HINTS | ||
| ENV SDL2DIR | ||
| ${SDL2_DIR} | ||
| PATH_SUFFIXES SDL2 | ||
| # path suffixes to search inside ENV{SDL2DIR} | ||
| include/SDL2 include | ||
| ) | ||
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||
| if(CMAKE_SIZEOF_VOID_P EQUAL 8) | ||
| set(VC_LIB_PATH_SUFFIX lib/x64) | ||
| else() | ||
| set(VC_LIB_PATH_SUFFIX lib/x86) | ||
| endif() | ||
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| find_library(SDL2_LIBRARY_TEMP | ||
| NAMES SDL2 | ||
| HINTS | ||
| ENV SDL2DIR | ||
| ${SDL2_DIR} | ||
| PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX} | ||
| ) | ||
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| # Hide this cache variable from the user, it's an internal implementation | ||
| # detail. The documented library variable for the user is SDL2_LIBRARY | ||
| # which is derived from SDL2_LIBRARY_TEMP further below. | ||
| set_property(CACHE SDL2_LIBRARY_TEMP PROPERTY TYPE INTERNAL) | ||
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| if(NOT SDL2_BUILDING_LIBRARY) | ||
| if(NOT SDL2_INCLUDE_DIR MATCHES ".framework") | ||
| # Non-OS X framework versions expect you to also dynamically link to | ||
| # SDLmain. This is mainly for Windows and OS X. Other (Unix) platforms | ||
| # seem to provide SDLmain for compatibility even though they don't | ||
| # necessarily need it. | ||
| find_library(SDL2MAIN_LIBRARY | ||
| NAMES SDL2main | ||
| HINTS | ||
| ENV SDL2DIR | ||
| ${SDL2_DIR} | ||
| PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX} | ||
| PATHS | ||
| /sw | ||
| /opt/local | ||
| /opt/csw | ||
| /opt | ||
| ) | ||
| endif() | ||
| endif() | ||
|
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| # SDL may require threads on your system. | ||
| # The Apple build may not need an explicit flag because one of the | ||
| # frameworks may already provide it. | ||
| # But for non-OSX systems, I will use the CMake Threads package. | ||
| if(NOT APPLE) | ||
| find_package(Threads) | ||
| endif() | ||
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| # MinGW needs an additional link flag, -mwindows | ||
| # It's total link flags should look like -lmingw32 -lSDLmain -lSDL -mwindows | ||
| if(MINGW) | ||
| set(MINGW32_LIBRARY mingw32 "-mwindows" CACHE STRING "link flags for MinGW") | ||
| endif() | ||
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| if(SDL2_LIBRARY_TEMP) | ||
| # For SDLmain | ||
| if(SDL2MAIN_LIBRARY AND NOT SDL2_BUILDING_LIBRARY) | ||
| list(FIND SDL2_LIBRARY_TEMP "${SDLMAIN_LIBRARY}" _SDL2_MAIN_INDEX) | ||
| if(_SDL2_MAIN_INDEX EQUAL -1) | ||
| set(SDL2_LIBRARY_TEMP "${SDLMAIN_LIBRARY}" ${SDL2_LIBRARY_TEMP}) | ||
| endif() | ||
| unset(_SDL2_MAIN_INDEX) | ||
| endif() | ||
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| # For OS X, SDL uses Cocoa as a backend so it must link to Cocoa. | ||
| # CMake doesn't display the -framework Cocoa string in the UI even | ||
| # though it actually is there if I modify a pre-used variable. | ||
| # I think it has something to do with the CACHE STRING. | ||
| # So I use a temporary variable until the end so I can set the | ||
| # "real" variable in one-shot. | ||
| if(APPLE) | ||
| set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa") | ||
| endif() | ||
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| # For threads, as mentioned Apple doesn't need this. | ||
| # In fact, there seems to be a problem if I used the Threads package | ||
| # and try using this line, so I'm just skipping it entirely for OS X. | ||
| if(NOT APPLE) | ||
| set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT}) | ||
| endif() | ||
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| # For MinGW library | ||
| if(MINGW) | ||
| set(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP}) | ||
| endif() | ||
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| # Set the final string here so the GUI reflects the final state. | ||
| set(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL Library can be found") | ||
| endif() | ||
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| if(SDL2_INCLUDE_DIR AND EXISTS "${SDL2_INCLUDE_DIR}/SDL2_version.h") | ||
| file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL2_MAJOR_VERSION[ \t]+[0-9]+$") | ||
| file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL2_MINOR_VERSION[ \t]+[0-9]+$") | ||
| file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL2_PATCHLEVEL[ \t]+[0-9]+$") | ||
| string(REGEX REPLACE "^#define[ \t]+SDL2_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MAJOR "${SDL2_VERSION_MAJOR_LINE}") | ||
| string(REGEX REPLACE "^#define[ \t]+SDL2_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MINOR "${SDL2_VERSION_MINOR_LINE}") | ||
| string(REGEX REPLACE "^#define[ \t]+SDL2_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_PATCH "${SDL2_VERSION_PATCH_LINE}") | ||
| set(SDL2_VERSION_STRING ${SDL2_VERSION_MAJOR}.${SDL2_VERSION_MINOR}.${SDL2_VERSION_PATCH}) | ||
| unset(SDL2_VERSION_MAJOR_LINE) | ||
| unset(SDL2_VERSION_MINOR_LINE) | ||
| unset(SDL2_VERSION_PATCH_LINE) | ||
| unset(SDL2_VERSION_MAJOR) | ||
| unset(SDL2_VERSION_MINOR) | ||
| unset(SDL2_VERSION_PATCH) | ||
| endif() | ||
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| set(SDL2_LIBRARIES ${SDL2_LIBRARY} ${SDL2MAIN_LIBRARY}) | ||
| set(SDL2_INCLUDE_DIRS ${SDL2_INCLUDE_DIR}) | ||
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| include(FindPackageHandleStandardArgs) | ||
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| FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 | ||
| REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR | ||
| VERSION_VAR SDL2_VERSION_STRING) |