| # Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| # file Copyright.txt or https://cmake.org/licensing for details. |
| |
| #.rst: |
| # FindSDL |
| # ------- |
| # |
| # Locate SDL library |
| # |
| # This module defines |
| # |
| # :: |
| # |
| # SDL_LIBRARY, the name of the library to link against |
| # SDL_FOUND, if false, do not try to link to SDL |
| # SDL_INCLUDE_DIR, where to find SDL.h |
| # SDL_VERSION_STRING, human-readable string containing the version of SDL |
| # |
| # |
| # |
| # This module responds to the flag: |
| # |
| # :: |
| # |
| # SDL_BUILDING_LIBRARY |
| # If this is defined, then no SDL_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 SDL_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 SDL_LIBRARY_TEMP in your |
| # configuration and no SDL_LIBRARY, it means CMake did not find your SDL |
| # library (SDL.dll, libsdl.so, SDL.framework, etc). Set |
| # SDL_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 |
| # SDL_LIBRARY variable, but when these values are unset, SDL_LIBRARY |
| # does not get created. |
| # |
| # |
| # |
| # $SDLDIR is an environment variable that would correspond to the |
| # ./configure --prefix=$SDLDIR 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 SDL_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). |
| |
| find_path(SDL_INCLUDE_DIR SDL.h |
| HINTS |
| ENV SDLDIR |
| PATH_SUFFIXES SDL SDL12 SDL11 |
| # path suffixes to search inside ENV{SDLDIR} |
| include/SDL include/SDL12 include/SDL11 include |
| ) |
| |
| if(CMAKE_SIZEOF_VOID_P EQUAL 8) |
| set(VC_LIB_PATH_SUFFIX lib/x64) |
| else() |
| set(VC_LIB_PATH_SUFFIX lib/x86) |
| endif() |
| |
| # SDL-1.1 is the name used by FreeBSD ports... |
| # don't confuse it for the version number. |
| find_library(SDL_LIBRARY_TEMP |
| NAMES SDL SDL-1.1 |
| HINTS |
| ENV SDLDIR |
| PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX} |
| ) |
| |
| # Hide this cache variable from the user, it's an internal implementation |
| # detail. The documented library variable for the user is SDL_LIBRARY |
| # which is derived from SDL_LIBRARY_TEMP further below. |
| set_property(CACHE SDL_LIBRARY_TEMP PROPERTY TYPE INTERNAL) |
| |
| if(NOT SDL_BUILDING_LIBRARY) |
| if(NOT SDL_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(SDLMAIN_LIBRARY |
| NAMES SDLmain SDLmain-1.1 |
| HINTS |
| ENV SDLDIR |
| PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX} |
| PATHS |
| /sw |
| /opt/local |
| /opt/csw |
| /opt |
| ) |
| endif() |
| endif() |
| |
| # SDL may require threads on your system. |
| # The Apple build may not need an explicit flag because one of the |
| # frameworks may already provide it. |
| # But for non-OSX systems, I will use the CMake Threads package. |
| if(NOT APPLE) |
| find_package(Threads) |
| endif() |
| |
| # MinGW needs an additional link flag, -mwindows |
| # It's total link flags should look like -lmingw32 -lSDLmain -lSDL -mwindows |
| if(MINGW) |
| set(MINGW32_LIBRARY mingw32 "-mwindows" CACHE STRING "link flags for MinGW") |
| endif() |
| |
| if(SDL_LIBRARY_TEMP) |
| # For SDLmain |
| if(SDLMAIN_LIBRARY AND NOT SDL_BUILDING_LIBRARY) |
| list(FIND SDL_LIBRARY_TEMP "${SDLMAIN_LIBRARY}" _SDL_MAIN_INDEX) |
| if(_SDL_MAIN_INDEX EQUAL -1) |
| set(SDL_LIBRARY_TEMP "${SDLMAIN_LIBRARY}" ${SDL_LIBRARY_TEMP}) |
| endif() |
| unset(_SDL_MAIN_INDEX) |
| endif() |
| |
| # 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(SDL_LIBRARY_TEMP ${SDL_LIBRARY_TEMP} "-framework Cocoa") |
| endif() |
| |
| # 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(SDL_LIBRARY_TEMP ${SDL_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT}) |
| endif() |
| |
| # For MinGW library |
| if(MINGW) |
| set(SDL_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL_LIBRARY_TEMP}) |
| endif() |
| |
| # Set the final string here so the GUI reflects the final state. |
| set(SDL_LIBRARY ${SDL_LIBRARY_TEMP} CACHE STRING "Where the SDL Library can be found") |
| endif() |
| |
| if(SDL_INCLUDE_DIR AND EXISTS "${SDL_INCLUDE_DIR}/SDL_version.h") |
| file(STRINGS "${SDL_INCLUDE_DIR}/SDL_version.h" SDL_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+[0-9]+$") |
| file(STRINGS "${SDL_INCLUDE_DIR}/SDL_version.h" SDL_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MINOR_VERSION[ \t]+[0-9]+$") |
| file(STRINGS "${SDL_INCLUDE_DIR}/SDL_version.h" SDL_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_PATCHLEVEL[ \t]+[0-9]+$") |
| string(REGEX REPLACE "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL_VERSION_MAJOR "${SDL_VERSION_MAJOR_LINE}") |
| string(REGEX REPLACE "^#define[ \t]+SDL_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL_VERSION_MINOR "${SDL_VERSION_MINOR_LINE}") |
| string(REGEX REPLACE "^#define[ \t]+SDL_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL_VERSION_PATCH "${SDL_VERSION_PATCH_LINE}") |
| set(SDL_VERSION_STRING ${SDL_VERSION_MAJOR}.${SDL_VERSION_MINOR}.${SDL_VERSION_PATCH}) |
| unset(SDL_VERSION_MAJOR_LINE) |
| unset(SDL_VERSION_MINOR_LINE) |
| unset(SDL_VERSION_PATCH_LINE) |
| unset(SDL_VERSION_MAJOR) |
| unset(SDL_VERSION_MINOR) |
| unset(SDL_VERSION_PATCH) |
| endif() |
| |
| include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) |
| |
| FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL |
| REQUIRED_VARS SDL_LIBRARY SDL_INCLUDE_DIR |
| VERSION_VAR SDL_VERSION_STRING) |