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130 lines
5.1 KiB
CMake
130 lines
5.1 KiB
CMake
# Locate SDL2 library
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# This module defines
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# SDL2_LIBRARY, the SDL2 library, with no other libraries
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# SDL2_LIBRARIES, the SDL library and required components with compiler flags
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# SDL2_FOUND, if false, do not try to link to SDL2
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# SDL2_INCLUDE_DIR, where to find SDL.h
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# SDL2_VERSION, the version of the found library
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#
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# This module accepts the following env variables
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# SDL2DIR - Can be set to ./configure --prefix=$SDL2DIR used in building SDL2. l.e.galup 9-20-02
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# This module responds to the the flag:
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# SDL2_BUILDING_LIBRARY
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# If this is defined, then no SDL2_main will be linked in because
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# only applications need main().
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# Otherwise, it is assumed you are building an application and this
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# module will attempt to locate and set the the proper link flags
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# as part of the returned SDL2_LIBRARIES variable.
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#
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# Don't forget to include SDL2main.h and SDL2main.m your project for the
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# OS X framework based version. (Other versions link to -lSDL2main which
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# this module will try to find on your behalf.) Also for OS X, this
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# module will automatically add the -framework Cocoa on your behalf.
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#
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#
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# Modified by Eric Wing.
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# Added code to assist with automated building by using environmental variables
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# and providing a more controlled/consistent search behavior.
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# Added new modifications to recognize OS X frameworks and
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# additional Unix paths (FreeBSD, etc).
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# Also corrected the header search path to follow "proper" SDL2 guidelines.
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# Added a search for SDL2main which is needed by some platforms.
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# Added a search for threads which is needed by some platforms.
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# Added needed compile switches for MinGW.
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#
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# On OSX, this will prefer the Framework version (if found) over others.
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# People will have to manually change the cache values of
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# SDL2_LIBRARY to override this selection or set the CMake environment
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# CMAKE_INCLUDE_PATH to modify the search paths.
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#
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# Note that the header path has changed from SDL2/SDL.h to just SDL.h
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# This needed to change because "proper" SDL2 convention
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# is #include "SDL.h", not <SDL2/SDL.h>. This is done for portability
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# reasons because not all systems place things in SDL2/ (see FreeBSD).
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#
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# Ported by Johnny Patterson. This is a literal port for SDL2 of the FindSDL.cmake
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# module with the minor edit of changing "SDL" to "SDL2" where necessary. This
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# was not created for redistribution, and exists temporarily pending official
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# SDL2 CMake modules.
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#=============================================================================
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# Copyright 2003-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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if (CMAKE_SIZEOF_VOID_P EQUAL 8)
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set(_sdl_lib_suffix lib/x64)
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else()
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set(_sdl_lib_suffix lib/x86)
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endif()
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libfind_pkg_detect(SDL2 sdl2
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FIND_PATH SDL.h
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HINTS $ENV{SDL2DIR}
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PATH_SUFFIXES include SDL2 include/SDL2
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FIND_LIBRARY SDL2
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HINTS $ENV{SDL2DIR}
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PATH_SUFFIXES lib ${_sdl_lib_suffix}
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)
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libfind_version_n_header(SDL2 NAMES SDL_version.h DEFINES SDL_MAJOR_VERSION SDL_MINOR_VERSION SDL_PATCHLEVEL)
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IF(NOT SDL2_BUILDING_LIBRARY AND NOT APPLE)
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# Non-OS X framework versions expect you to also dynamically link to
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# SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms
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# seem to provide SDL2main for compatibility even though they don't
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# necessarily need it.
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libfind_pkg_detect(SDL2MAIN sdl2
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FIND_LIBRARY SDL2main
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HINTS $ENV{SDL2DIR}
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PATH_SUFFIXES lib ${_sdl_lib_suffix}
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)
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set(SDL2MAIN_FIND_QUIETLY TRUE)
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libfind_process(SDL2MAIN)
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list(APPEND SDL2_PROCESS_LIBS SDL2MAIN_LIBRARY)
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ENDIF()
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set(SDL2_TARGET_SPECIFIC)
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if (APPLE)
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# For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa.
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list(APPEND SDL2_TARGET_SPECIFIC "-framework Cocoa")
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else()
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# SDL2 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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libfind_package(SDL2 Threads)
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list(APPEND SDL2_TARGET_SPECIFIC ${CMAKE_THREAD_LIBS_INIT})
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endif()
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# MinGW needs an additional library, mwindows
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# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows
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# (Actually on second look, I think it only needs one of the m* libraries.)
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if(MINGW)
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list(APPEND SDL2_TARGET_SPECIFIC mingw32)
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endif()
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if(WIN32)
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list(APPEND SDL2_TARGET_SPECIFIC winmm imm32 version msimg32)
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endif()
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set(SDL2_PROCESS_LIBS SDL2_TARGET_SPECIFIC)
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libfind_process(SDL2)
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if (SDL2_STATIC AND UNIX AND NOT APPLE)
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execute_process(COMMAND sdl2-config --static-libs OUTPUT_VARIABLE SDL2_STATIC_FLAGS)
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string(REGEX REPLACE "(\r?\n)+$" "" SDL2_STATIC_FLAGS "${SDL2_STATIC_FLAGS}")
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set(SDL2_LIBRARIES ${SDL2_STATIC_FLAGS})
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endif()
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