blame: source/misc/cmake/FindSDL2.cmake

# Locate SDL2 library

# This module defines

# SDL2_LIBRARY, the name of the library to link against

# SDL2_FOUND, if false, do not try to link to SDL2

# SDL2_INCLUDE_DIR, where to find SDL.h

#

# This module responds to the the flag:

# SDL2_BUILDING_LIBRARY

# If this is defined, then no SDL2_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 the proper link flags

# as part of the returned SDL2_LIBRARY variable.

#

# Don't forget to include SDL2main.h and SDL2main.m your project for the

# OS X framework based version. (Other versions link to -lSDL2main 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 SDL2_LIBRARY_TEMP in your configuration

# and no SDL2_LIBRARY, it means CMake did not find your SDL2 library

# (SDL2.dll, libsdl2.so, SDL2.framework, etc).

# Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again.

# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value

# as appropriate. These values are used to generate the final SDL2_LIBRARY

# variable, but when these values are unset, SDL2_LIBRARY does not get created.

#

#

# $SDL2 is an environment variable that would

# correspond to the ./configure --prefix=$SDL2

# used in building SDL2.

# 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" SDL2 guidelines.

# Added a search for SDL2main 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

# SDL2_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 SDL2/SDL.h to just SDL.h

# This needed to change because "proper" SDL2 convention

# is #include "SDL.h", not <SDL2/SDL.h>. This is done for portability

# reasons because not all systems place things in SDL2/ (see FreeBSD).

#

# Ported by Johnny Patterson. This is a literal port for SDL2 of the FindSDL.cmake

# module with the minor edit of changing "SDL" to "SDL2" where necessary. This

# was not created for redistribution, and exists temporarily pending official

# SDL2 CMake modules.

#

# Note that on windows this will only search for the 32bit libraries, to search

# for 64bit change x86/i686-w64 to x64/x86_64-w64

#=============================================================================

# Copyright 2003-2009 Kitware, Inc.

#

# CMake - Cross Platform Makefile Generator

# Copyright 2000-2014 Kitware, Inc.

# Copyright 2000-2011 Insight Software Consortium

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

# * Redistributions of source code must retain the above copyright

# notice, this list of conditions and the following disclaimer.

#

# * Redistributions in binary form must reproduce the above copyright

# notice, this list of conditions and the following disclaimer in the

# documentation and/or other materials provided with the distribution.

#

# * Neither the names of Kitware, Inc., the Insight Software Consortium,

# nor the names of their contributors may be used to endorse or promote

# products derived from this software without specific prior written

# permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#

# 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.)

FIND_PATH(SDL2_INCLUDE_DIR SDL.h

	HINTS

	${SDL2}

	$ENV{SDL2}

	PATH_SUFFIXES include/SDL2 include SDL2

	i686-w64-mingw32/include/SDL2

	x86_64-w64-mingw32/include/SDL2

	PATHS

	~/Library/Frameworks

	/Library/Frameworks

	/usr/local/include/SDL2

	/usr/include/SDL2

	/sw # Fink

	/opt/local # DarwinPorts

	/opt/csw # Blastwave

	/opt

)

# Lookup the 64 bit libs on x64

IF(CMAKE_SIZEOF_VOID_P EQUAL 8)

	FIND_LIBRARY(SDL2_LIBRARY_TEMP SDL2

		HINTS

		${SDL2}

		$ENV{SDL2}

		PATH_SUFFIXES lib64 lib

		lib/x64

		x86_64-w64-mingw32/lib

		PATHS

		/sw

		/opt/local

		/opt/csw

		/opt

	)

# On 32bit build find the 32bit libs

ELSE(CMAKE_SIZEOF_VOID_P EQUAL 8)

	FIND_LIBRARY(SDL2_LIBRARY_TEMP SDL2

		HINTS

		${SDL2}

		$ENV{SDL2}

		PATH_SUFFIXES lib

		lib/x86

		i686-w64-mingw32/lib

		PATHS

		/sw

		/opt/local

		/opt/csw

		/opt

	)

ENDIF(CMAKE_SIZEOF_VOID_P EQUAL 8)

IF(NOT SDL2_BUILDING_LIBRARY)

	IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")

		# Non-OS X framework versions expect you to also dynamically link to

		# SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms

		# seem to provide SDL2main for compatibility even though they don't

		# necessarily need it.

		# Lookup the 64 bit libs on x64

		IF(CMAKE_SIZEOF_VOID_P EQUAL 8)

			FIND_LIBRARY(SDL2MAIN_LIBRARY

				NAMES SDL2main

				HINTS

				${SDL2}

				$ENV{SDL2}

				PATH_SUFFIXES lib64 lib

				lib/x64

				x86_64-w64-mingw32/lib

				PATHS

				/sw

				/opt/local

				/opt/csw

				/opt

				)

			# On 32bit build find the 32bit libs

		ELSE(CMAKE_SIZEOF_VOID_P EQUAL 8)

			FIND_LIBRARY(SDL2MAIN_LIBRARY

				NAMES SDL2main

				HINTS

				${SDL2}

				$ENV{SDL2}

				PATH_SUFFIXES lib

				lib/x86

				i686-w64-mingw32/lib

				PATHS

				/sw

				/opt/local

				/opt/csw

				/opt

				)

		ENDIF(CMAKE_SIZEOF_VOID_P EQUAL 8)

	ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")

ENDIF(NOT SDL2_BUILDING_LIBRARY)

# SDL2 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 -lSDL2main -lSDL2 -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)

SET(SDL2_FOUND "NO")

	IF(SDL2_LIBRARY_TEMP)

		# For SDL2main

		IF(NOT SDL2_BUILDING_LIBRARY)

			IF(SDL2MAIN_LIBRARY)

				SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP})

			ENDIF(SDL2MAIN_LIBRARY)

		ENDIF(NOT SDL2_BUILDING_LIBRARY)

		# For OS X, SDL2 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(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-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(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})

		ENDIF(NOT APPLE)

		# For MinGW library

		IF(MINGW)

			SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})

		ENDIF(MINGW)

		# Set the final string here so the GUI reflects the final state.

		SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found")

		# Set the temp variable to INTERNAL so it is not seen in the CMake GUI

		SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")

		SET(SDL2_FOUND "YES")

ENDIF(SDL2_LIBRARY_TEMP)

INCLUDE(FindPackageHandleStandardArgs)

FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)