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FindSDL3.cmake
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FindSDL3.cmake
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# Locate SDL3 library
# This module defines
# SDL3_LIBRARY, the name of the library to link against
# SDL3_FOUND, if false, do not try to link to SDL3
# SDL3_INCLUDE, where to find SDL.h
#
# This module responds to the the flag:
# SDL3_BUILDING_LIBRARY
# If this is defined, then no SDL3main 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 the proper link flags
# as part of the returned SDL3_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 -lSDL3main 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 SDL3_LIBRARY in your configuration
# and no SDL3_LIBRARY, it means CMake did not find your SDL3 library
# (SDL3.dll, libSDL3.so, SDL3.framework, etc).
# Set SDL3_LIBRARY to point to your SDL3 library, and configure again.
# Similarly, if you see an empty SDL3MAIN_LIBRARY, you should set this value
# as appropriate. These values are used to generate the final SDL3_LIBRARY
# variable, but when these values are unset, SDL3_LIBRARY does not get created.
#
#
# $SDL3DIR is an environment variable that would
# correspond to the ./configure --prefix=$SDL3DIR
# used in building SDL3.
# 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 SDL3main 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
# SDL3_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 SDL3/SDL.h to just SDL.h
# This needed to change because "proper" SDL convention
# is #include "SDL.h", not <SDL3/SDL.h>. This is done for portability
# reasons because not all systems place things in SDL3/ (see FreeBSD).
#=============================================================================
# Copyright 2003-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
SET(SDL3_SEARCH_PATHS
~/Library/Frameworks
/Library/Frameworks
/usr/local
/usr
/sw # Fink
/opt/local # DarwinPorts
/opt/csw # Blastwave
/opt
)
FIND_PATH(SDL3_INCLUDE
NAMES
SDL_gesture.h # A SDL3-only header
HINTS
$ENV{SDL3DIR}
PATH_SUFFIXES
include/SDL3
include
PATHS
${SDL3_SEARCH_PATHS}
)
FIND_LIBRARY(SDL3_LIBRARY
NAMES SDL3
HINTS
$ENV{SDL3DIR}
PATH_SUFFIXES lib64 lib
PATHS ${SDL3_SEARCH_PATHS}
)
# SDL3 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(NOT APPLE)
# MinGW needs an additional library, mwindows
# It's total link flags should look like -lmingw32 -lSDL3main -lSDL3 -lmwindows
# (Actually on second look, I think it only needs one of the m* libraries.)
IF(MINGW)
SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
ENDIF(MINGW)
IF(SDL3_LIBRARY)
# For OS X, SDL3 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(SDL3_LIBRARY ${SDL3_LIBRARY} "-framework Cocoa")
ENDIF(APPLE)
# 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(SDL3_LIBRARY ${SDL3_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
ENDIF(NOT APPLE)
# For MinGW library
IF(MINGW)
SET(SDL3_LIBRARY ${MINGW32_LIBRARY} ${SDL3_LIBRARY})
ENDIF(MINGW)
# Set the final string here so the GUI reflects the final state.
SET(SDL3_LIBRARY ${SDL3_LIBRARY} CACHE STRING "Where the SDL3 Library can be found")
# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
SET(SDL3_LIBRARY "${SDL3_LIBRARY}" CACHE INTERNAL "")
ENDIF(SDL3_LIBRARY)
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL3 REQUIRED_VARS SDL3_LIBRARY SDL3_INCLUDE)