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Merge pull request #3398 from brianclinkenbeard/fix-cmake-sdl2
Use config mode for finding SDL2 with CMake
This commit is contained in:
Zach Hilman
GitHub
commit
4501bd8ca9
2 changed files with 6 additions and 244 deletions
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@ -151,15 +151,16 @@ if (ENABLE_SDL2)
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set(SDL2_INCLUDE_DIR "${SDL2_PREFIX}/include" CACHE PATH "Path to SDL2 headers")
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set(SDL2_LIBRARY "${SDL2_PREFIX}/lib/x64/SDL2.lib" CACHE PATH "Path to SDL2 library")
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set(SDL2_DLL_DIR "${SDL2_PREFIX}/lib/x64/" CACHE PATH "Path to SDL2.dll")
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else()
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find_package(SDL2 REQUIRED)
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endif()
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if (SDL2_FOUND)
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# TODO(yuriks): Make FindSDL2.cmake export an IMPORTED library instead
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add_library(SDL2 INTERFACE)
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target_link_libraries(SDL2 INTERFACE "${SDL2_LIBRARY}")
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target_include_directories(SDL2 INTERFACE "${SDL2_INCLUDE_DIR}")
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else()
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find_package(SDL2 REQUIRED)
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include_directories(${SDL2_INCLUDE_DIRS})
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add_library(SDL2 INTERFACE)
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target_link_libraries(SDL2 INTERFACE "${SDL2_LIBRARIES}")
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endif()
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else()
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set(SDL2_FOUND NO)
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239
externals/cmake-modules/FindSDL2.cmake
vendored
239
externals/cmake-modules/FindSDL2.cmake
vendored
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@ -1,239 +0,0 @@
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# This module defines
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# SDL2_LIBRARY, the name of the library to link against
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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_DLL_DIR, where to find SDL2.dll if it exists
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#
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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 SDL2main 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_LIBRARY variable.
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#
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# Don't forget to include SDLmain.h and SDLmain.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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# Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration
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# and no SDL2_LIBRARY, it means CMake did not find your SDL2 library
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# (SDL2.dll, libsdl2.so, SDL2.framework, etc).
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# Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again.
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# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value
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# as appropriate. These values are used to generate the final SDL2_LIBRARY
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# variable, but when these values are unset, SDL2_LIBRARY does not get created.
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#
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#
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# $SDL2DIR is an environment variable that would
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# correspond to the ./configure --prefix=$SDL2DIR
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# used in building SDL2.
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# l.e.galup 9-20-02
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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" SDL 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" SDL 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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# 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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#
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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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# CMake - Cross Platform Makefile Generator
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# Copyright 2000-2016 Kitware, Inc.
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# Copyright 2000-2011 Insight Software Consortium
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# * Neither the names of Kitware, Inc., the Insight Software Consortium,
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# nor the names of their contributors may be used to endorse or promote
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# products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# ------------------------------------------------------------------------------
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#
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# The above copyright and license notice applies to distributions of
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# CMake in source and binary form. Some source files contain additional
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# notices of original copyright by their contributors; see each source
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# for details. Third-party software packages supplied with CMake under
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# compatible licenses provide their own copyright notices documented in
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# corresponding subdirectories.
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#
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# ------------------------------------------------------------------------------
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#
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# CMake was initially developed by Kitware with the following sponsorship:
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#
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# * National Library of Medicine at the National Institutes of Health
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# as part of the Insight Segmentation and Registration Toolkit (ITK).
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#
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# * US National Labs (Los Alamos, Livermore, Sandia) ASC Parallel
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# Visualization Initiative.
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#
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# * National Alliance for Medical Image Computing (NAMIC) is funded by the
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# National Institutes of Health through the NIH Roadmap for Medical Research,
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# Grant U54 EB005149.
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#
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# * Kitware, Inc.
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#
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message("<FindSDL2.cmake>")
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SET(SDL2_SEARCH_PATHS
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~/Library/Frameworks
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/Library/Frameworks
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/usr/local
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/usr
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/sw # Fink
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/opt/local # DarwinPorts
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/opt/csw # Blastwave
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/opt
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${SDL2_PATH}
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)
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
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set(VC_LIB_PATH_SUFFIX lib/x64)
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else()
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set(VC_LIB_PATH_SUFFIX lib/x86)
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endif()
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FIND_LIBRARY(SDL2_LIBRARY_TEMP
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NAMES SDL2
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HINTS
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$ENV{SDL2DIR}
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PATH_SUFFIXES lib64 lib ${VC_LIB_PATH_SUFFIX}
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PATHS ${SDL2_SEARCH_PATHS}
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)
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IF(SDL2_LIBRARY_TEMP)
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if(MSVC)
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get_filename_component(SDL2_DLL_DIR_TEMP ${SDL2_LIBRARY_TEMP} DIRECTORY)
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if(EXISTS ${SDL2_DLL_DIR_TEMP}/SDL2.dll)
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set(SDL2_DLL_DIR ${SDL2_DLL_DIR_TEMP})
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unset(SDL2_DLL_DIR_TEMP)
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endif()
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endif()
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FIND_PATH(SDL2_INCLUDE_DIR SDL.h
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HINTS
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$ENV{SDL2DIR}
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PATH_SUFFIXES include/SDL2 include
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PATHS ${SDL2_SEARCH_PATHS}
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)
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IF(NOT SDL2_BUILDING_LIBRARY)
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IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
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# Non-OS X framework versions expect you to also dynamically link to
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# SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms
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# seem to provide SDL2main for compatibility even though they don't
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# necessarily need it.
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FIND_LIBRARY(SDL2MAIN_LIBRARY
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NAMES SDL2main
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HINTS
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$ENV{SDL2DIR}
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PATH_SUFFIXES lib64 lib
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PATHS ${SDL2_SEARCH_PATHS}
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)
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ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
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ENDIF(NOT SDL2_BUILDING_LIBRARY)
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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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IF(NOT APPLE)
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FIND_PACKAGE(Threads)
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ENDIF(NOT APPLE)
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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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SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
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ENDIF(MINGW)
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# For SDL2main
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IF(NOT SDL2_BUILDING_LIBRARY)
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IF(SDL2MAIN_LIBRARY)
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SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP})
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ENDIF(SDL2MAIN_LIBRARY)
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ENDIF(NOT SDL2_BUILDING_LIBRARY)
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# For OS X, SDL2 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(APPLE)
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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(NOT APPLE)
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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(MINGW)
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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 SDL2 Library can be found")
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# Unset the temp variable to INTERNAL so it is not seen in the CMake GUI
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UNSET(SDL2_LIBRARY_TEMP)
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ENDIF(SDL2_LIBRARY_TEMP)
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message("</FindSDL2.cmake>")
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INCLUDE(FindPackageHandleStandardArgs)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)
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