lizzie
2 weeks ago
2 changed files with 1 additions and 398 deletions
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# SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project |
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# SPDX-License-Identifier: GPL-3.0-or-later |
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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
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# file Copyright.txt or https://cmake.org/licensing for details. |
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# Copyright 2019 Amine Ben Hassouna <amine.benhassouna@gmail.com> |
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# Copyright 2000-2019 Kitware, Inc. and Contributors |
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# All rights reserved. |
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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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# * 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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# * 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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# * Neither the name of Kitware, Inc. nor the names of Contributors |
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# may be used to endorse or promote products derived from this |
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# software without specific prior written permission. |
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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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#[=======================================================================[.rst: |
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FindSDL2 |
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-------- |
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Locate SDL2 library |
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This module defines the following 'IMPORTED' targets: |
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:: |
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SDL2::Core |
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The SDL2 library, if found. |
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Libraries should link to SDL2::Core |
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SDL2::Main |
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The SDL2main library, if found. |
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Applications should link to SDL2::Main instead of SDL2::Core |
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This module will set the following variables in your project: |
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:: |
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SDL2_LIBRARIES, the name of the library to link against |
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SDL2_INCLUDE_DIRS, where to find SDL.h |
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SDL2_FOUND, if false, do not try to link to SDL2 |
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SDL2MAIN_FOUND, if false, do not try to link to SDL2main |
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SDL2_VERSION_STRING, human-readable string containing the version of SDL2 |
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This module responds to the following cache variables: |
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:: |
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SDL2_PATH |
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Set a custom SDL2 Library path (default: empty) |
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SDL2_NO_DEFAULT_PATH |
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Disable search SDL2 Library in default path. |
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If SDL2_PATH (default: ON) |
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Else (default: OFF) |
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SDL2_INCLUDE_DIR |
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SDL2 headers path. |
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SDL2_LIBRARY |
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SDL2 Library (.dll, .so, .a, etc) path. |
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SDL2MAIN_LIBRAY |
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SDL2main Library (.a) path. |
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SDL2_BUILDING_LIBRARY |
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This flag is useful only when linking to SDL2_LIBRARIES insead of |
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SDL2::Main. It is required only when building a library that links to |
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SDL2_LIBRARIES, because only applications need main() (No need to also |
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link to SDL2main). |
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If this flag is defined, then no SDL2main will be added to SDL2_LIBRARIES |
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and no SDL2::Main target will be created. |
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Don't forget to include SDLmain.h and SDLmain.m in 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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Additional Note: If you see an empty SDL2_LIBRARY in your project |
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configuration, it means CMake did not find your SDL2 library |
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(SDL2.dll, libsdl2.so, SDL2.framework, etc). Set SDL2_LIBRARY to point |
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to your SDL2 library, and configure again. Similarly, if you see an |
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empty SDL2MAIN_LIBRARY, you should set this value as appropriate. These |
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values are used to generate the final SDL2_LIBRARIES variable and the |
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SDL2::Core and SDL2::Main targets, but when these values are unset, |
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SDL2_LIBRARIES, SDL2::Core and SDL2::Main does not get created. |
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$SDL2DIR is an environment variable that would correspond to the |
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./configure --prefix=$SDL2DIR used in building SDL2. l.e.galup 9-20-02 |
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Created by Amine Ben Hassouna: |
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Adapt FindSDL.cmake to SDL2 (FindSDL2.cmake). |
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Add cache variables for more flexibility: |
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SDL2_PATH, SDL2_NO_DEFAULT_PATH (for details, see doc above). |
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Mark 'Threads' as a required dependency for non-OSX systems. |
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Modernize the FindSDL2.cmake module by creating specific targets: |
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SDL2::Core and SDL2::Main (for details, see doc above). |
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Original FindSDL.cmake module: |
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Modified by Eric Wing. Added code to assist with automated building |
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by using environmental variables and providing a more |
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controlled/consistent search behavior. Added new modifications to |
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recognize OS X frameworks and additional Unix paths (FreeBSD, etc). |
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Also corrected the header search path to follow "proper" SDL |
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guidelines. Added a search for SDLmain which is needed by some |
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platforms. Added a search for threads which is needed by some |
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platforms. Added needed compile switches for MinGW. |
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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 value of SDL2_LIBRARY to |
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override this selection or set the SDL2_PATH variable or the CMake |
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environment CMAKE_INCLUDE_PATH to modify the search paths. |
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Note that the header path has changed from SDL/SDL.h to just SDL.h |
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This needed to change because "proper" SDL convention is #include |
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"SDL.h", not <SDL/SDL.h>. This is done for portability reasons |
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because not all systems place things in SDL/ (see FreeBSD). |
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#]=======================================================================] |
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# Define options for searching SDL2 Library in a custom path |
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set(SDL2_PATH "" CACHE STRING "Custom SDL2 Library path") |
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set(_SDL2_NO_DEFAULT_PATH OFF) |
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if(SDL2_PATH) |
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set(_SDL2_NO_DEFAULT_PATH ON) |
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endif() |
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set(SDL2_NO_DEFAULT_PATH ${_SDL2_NO_DEFAULT_PATH} |
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CACHE BOOL "Disable search SDL2 Library in default path") |
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unset(_SDL2_NO_DEFAULT_PATH) |
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set(SDL2_NO_DEFAULT_PATH_CMD) |
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if(SDL2_NO_DEFAULT_PATH) |
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set(SDL2_NO_DEFAULT_PATH_CMD NO_DEFAULT_PATH) |
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endif() |
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# Search for the SDL2 include directory |
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find_path(SDL2_INCLUDE_DIR SDL.h |
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HINTS |
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ENV SDL2DIR |
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${SDL2_NO_DEFAULT_PATH_CMD} |
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PATH_SUFFIXES SDL2 |
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# path suffixes to search inside ENV{SDL2DIR} |
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include/SDL2 include |
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PATHS ${SDL2_PATH} |
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DOC "Where the SDL2 headers can be found" |
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) |
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set(SDL2_INCLUDE_DIRS "${SDL2_INCLUDE_DIR}") |
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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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# SDL-2.0 is the name used by FreeBSD ports... |
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# don't confuse it for the version number. |
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find_library(SDL2_LIBRARY |
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NAMES SDL2 SDL-2.0 |
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HINTS |
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ENV SDL2DIR |
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${SDL2_NO_DEFAULT_PATH_CMD} |
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PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX} |
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PATHS ${SDL2_PATH} |
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DOC "Where the SDL2 Library can be found" |
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) |
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set(SDL2_LIBRARIES "${SDL2_LIBRARY}") |
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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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if(SDL2_PATH) |
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set(SDL2MAIN_LIBRARY_PATHS "${SDL2_PATH}") |
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endif() |
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if(NOT SDL2_NO_DEFAULT_PATH) |
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set(SDL2MAIN_LIBRARY_PATHS |
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/sw |
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/opt/local |
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/opt/csw |
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/opt |
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"${SDL2MAIN_LIBRARY_PATHS}" |
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) |
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endif() |
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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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${SDL2_NO_DEFAULT_PATH_CMD} |
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PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX} |
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PATHS ${SDL2MAIN_LIBRARY_PATHS} |
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DOC "Where the SDL2main library can be found" |
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) |
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unset(SDL2MAIN_LIBRARY_PATHS) |
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endif() |
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endif() |
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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 QUIET) |
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if(NOT Threads_FOUND) |
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set(SDL2_THREADS_NOT_FOUND "Could NOT find Threads (Threads is required by SDL2).") |
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if(SDL2_FIND_REQUIRED) |
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message(FATAL_ERROR ${SDL2_THREADS_NOT_FOUND}) |
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else() |
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if(NOT SDL2_FIND_QUIETLY) |
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message(STATUS ${SDL2_THREADS_NOT_FOUND}) |
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endif() |
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return() |
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endif() |
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unset(SDL2_THREADS_NOT_FOUND) |
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endif() |
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endif() |
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# MinGW needs an additional link flag, -mwindows |
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# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -mwindows |
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if(MINGW) |
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set(MINGW32_LIBRARY mingw32 "-mwindows" CACHE STRING "link flags for MinGW") |
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endif() |
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if(SDL2_LIBRARY) |
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# For SDL2main |
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if(SDL2MAIN_LIBRARY AND NOT SDL2_BUILDING_LIBRARY) |
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list(FIND SDL2_LIBRARIES "${SDL2MAIN_LIBRARY}" _SDL2_MAIN_INDEX) |
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if(_SDL2_MAIN_INDEX EQUAL -1) |
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set(SDL2_LIBRARIES "${SDL2MAIN_LIBRARY}" ${SDL2_LIBRARIES}) |
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endif() |
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unset(_SDL2_MAIN_INDEX) |
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endif() |
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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_LIBRARIES ${SDL2_LIBRARIES} -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_LIBRARIES ${SDL2_LIBRARIES} ${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_LIBRARIES ${MINGW32_LIBRARY} ${SDL2_LIBRARIES}) |
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endif() |
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endif() |
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# Read SDL2 version |
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if(SDL2_INCLUDE_DIR AND EXISTS "${SDL2_INCLUDE_DIR}/SDL_version.h") |
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file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+[0-9]+$") |
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file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MINOR_VERSION[ \t]+[0-9]+$") |
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file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_PATCHLEVEL[ \t]+[0-9]+$") |
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string(REGEX REPLACE "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MAJOR "${SDL2_VERSION_MAJOR_LINE}") |
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string(REGEX REPLACE "^#define[ \t]+SDL_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MINOR "${SDL2_VERSION_MINOR_LINE}") |
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string(REGEX REPLACE "^#define[ \t]+SDL_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_PATCH "${SDL2_VERSION_PATCH_LINE}") |
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set(SDL2_VERSION_STRING ${SDL2_VERSION_MAJOR}.${SDL2_VERSION_MINOR}.${SDL2_VERSION_PATCH}) |
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unset(SDL2_VERSION_MAJOR_LINE) |
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unset(SDL2_VERSION_MINOR_LINE) |
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unset(SDL2_VERSION_PATCH_LINE) |
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unset(SDL2_VERSION_MAJOR) |
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unset(SDL2_VERSION_MINOR) |
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unset(SDL2_VERSION_PATCH) |
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endif() |
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include(FindPackageHandleStandardArgs) |
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 |
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REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR |
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VERSION_VAR SDL2_VERSION_STRING) |
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if(SDL2MAIN_LIBRARY) |
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2main |
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REQUIRED_VARS SDL2MAIN_LIBRARY SDL2_INCLUDE_DIR |
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VERSION_VAR SDL2_VERSION_STRING) |
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endif() |
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mark_as_advanced(SDL2_PATH |
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SDL2_NO_DEFAULT_PATH |
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SDL2_LIBRARY |
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SDL2MAIN_LIBRARY |
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SDL2_INCLUDE_DIR |
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SDL2_BUILDING_LIBRARY) |
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# SDL2:: targets (SDL2::Core and SDL2::Main) |
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if(SDL2_FOUND) |
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# SDL2::Core target |
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if(SDL2_LIBRARY AND NOT TARGET SDL2::Core) |
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add_library(SDL2::Core UNKNOWN IMPORTED) |
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set_target_properties(SDL2::Core PROPERTIES |
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IMPORTED_LOCATION "${SDL2_LIBRARY}" |
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}") |
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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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# For more details, please see above. |
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set_property(TARGET SDL2::Core APPEND PROPERTY |
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INTERFACE_LINK_OPTIONS -framework Cocoa) |
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else() |
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# For threads, as mentioned Apple doesn't need this. |
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# For more details, please see above. |
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set_property(TARGET SDL2::Core APPEND PROPERTY |
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INTERFACE_LINK_LIBRARIES Threads::Threads) |
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endif() |
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endif() |
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# SDL2::Main target |
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# Applications should link to SDL2::Main instead of SDL2::Core |
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# For more details, please see above. |
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if(NOT SDL2_BUILDING_LIBRARY AND NOT TARGET SDL2::Main) |
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if(SDL2_INCLUDE_DIR MATCHES ".framework" OR NOT SDL2MAIN_LIBRARY) |
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add_library(SDL2::Main INTERFACE IMPORTED) |
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set_property(TARGET SDL2::Main PROPERTY |
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INTERFACE_LINK_LIBRARIES SDL2::Core) |
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elseif(SDL2MAIN_LIBRARY) |
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# MinGW requires that the mingw32 library is specified before the |
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# libSDL2main.a static library when linking. |
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# The SDL2::MainInternal target is used internally to make sure that |
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# CMake respects this condition. |
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add_library(SDL2::MainInternal UNKNOWN IMPORTED) |
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set_property(TARGET SDL2::MainInternal PROPERTY |
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IMPORTED_LOCATION "${SDL2MAIN_LIBRARY}") |
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set_property(TARGET SDL2::MainInternal PROPERTY |
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INTERFACE_LINK_LIBRARIES SDL2::Core) |
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add_library(SDL2::Main INTERFACE IMPORTED) |
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if(MINGW) |
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# MinGW needs an additional link flag '-mwindows' and link to mingw32 |
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set_property(TARGET SDL2::Main PROPERTY |
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INTERFACE_LINK_LIBRARIES "mingw32" "-mwindows") |
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endif() |
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set_property(TARGET SDL2::Main APPEND PROPERTY |
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INTERFACE_LINK_LIBRARIES SDL2::MainInternal) |
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endif() |
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endif() |
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endif() |
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