diff --git a/sdl2-config.cmake.in b/sdl2-config.cmake.in --- a/sdl2-config.cmake.in +++ b/sdl2-config.cmake.in @@ -1,11 +1,200 @@ -# sdl2 cmake project-config input for ./configure scripts +# This file is mostly based around the old FindSDL.cmake that is included in +# CMake's installation. This will attempt to find SDL2 library and include +# directories installed in your system and variables below accordingly. With +# the latest additions, it will also define targets to be used in +# target_link_libraries. +# +# This module defines +# TARGET SDL2, so you can target_link_libraries(YourLib SDL2) +# TARGET SDL2main. You don't need to use this explicity, it is automatically +# added as a dependency. +# SDL2_LIBRARY, a list of link flags, including SDL +# 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 SDL2main 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 SDLmain.h and SDLmain.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. +# +# +# $SDL2DIR is an environment variable that would +# correspond to the ./configure --prefix=$SDL2DIR +# 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" SDL 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" SDL convention +# is #include "SDL.h", not . This is done for portability +# reasons because not all systems place things in SDL2/ (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(SDL2_SEARCH_PATHS + ~/Library/Frameworks + /Library/Frameworks + /usr/local + /usr + /sw # Fink + /opt/local # DarwinPorts + /opt/csw # Blastwave + /opt + ${SDL2_PATH} +) + +find_path(SDL2_INCLUDE_DIR SDL.h + HINTS + $ENV{SDL2DIR} + PATH_SUFFIXES include/SDL2 include + PATHS ${SDL2_SEARCH_PATHS} +) + +if (CMAKE_SIZEOF_VOID_P EQUAL 8) + set(PATH_SUFFIXES lib64 lib/x64 lib) +else () + set(PATH_SUFFIXES lib/x86 lib) +endif () -set(prefix "@prefix@") -set(exec_prefix "@exec_prefix@") -set(libdir "@libdir@") -set(SDL2_PREFIX "@prefix@") -set(SDL2_EXEC_PREFIX "@prefix@") -set(SDL2_LIBDIR "@libdir@") -set(SDL2_INCLUDE_DIRS "@includedir@/SDL2") -set(SDL2_LIBRARIES "-L${SDL2_LIBDIR} @SDL_RLD_FLAGS@ @SDL_LIBS@") -string(STRIP "${SDL2_LIBRARIES}" SDL2_LIBRARIES) +find_library(SDL2_LIBRARY_LOCATION + NAMES SDL2 + HINTS + $ENV{SDL2DIR} + PATH_SUFFIXES ${PATH_SUFFIXES} + PATHS ${SDL2_SEARCH_PATHS} +) + +set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_LOCATION}) + +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. + find_library(SDL2MAIN_LIBRARY + NAMES SDL2main + HINTS + $ENV{SDL2DIR} + PATH_SUFFIXES ${PATH_SUFFIXES} + PATHS ${SDL2_SEARCH_PATHS} + ) + endif() +endif() + +# 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 () + +# MinGW needs an additional link flag, -mwindows +# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -mwindows +if (MINGW) + set(MINGW32_LIBRARY mingw32 "-mwindows" CACHE STRING "mwindows for MinGW") +endif () + +if (SDL2_LIBRARY_TEMP) + # If SDL2 was found, add a library target. + add_library(SDL2 SHARED IMPORTED) + set_target_properties(SDL2 PROPERTIES + IMPORTED_LOCATION ${SDL2_LIBRARY_LOCATION} + INTERFACE_INCLUDE_DIRECTORIES ${SDL2_INCLUDE_DIR}) + + # For SDL2main + if (NOT SDL2_BUILDING_LIBRARY) + if (SDL2MAIN_LIBRARY) + # If the SDL2 main library is needed and found, add a target to it. + # Also, makes the top-level SDL2 target depend on it. + add_library(SDL2main STATIC IMPORTED) + set_property(TARGET SDL2main IMPORTED_LOCATION ${SDL2MAIN_LIBRARY}) + target_link_libraries(SDL2 INTERFACE SDL2main) + + # Keep increasing SDL2_LIBRARY_TEMP + set(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP}) + endif () + endif () + + # 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") + get_property(INTERFACE_LINK_LIBRARIES TARGET SDL2 PROPERTY INTERFACE_LINK_LIBRARIES) + set_property(TARGET SDL2 PROPERTY + INTERFACE_LINK_LIBRARIES ${INTERFACE_LINK_LIBRARIES} "-framework Cocoa") + endif () + + # 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}) + get_property(INTERFACE_LINK_LIBRARIES TARGET SDL2 PROPERTY INTERFACE_LINK_LIBRARIES) + set_property(TARGET SDL2 PROPERTY + INTERFACE_LINK_LIBRARIES ${INTERFACE_LINK_LIBRARIES} ${CMAKE_THREADS_LIBS_INIT}) + endif () + + # For MinGW library + if (MINGW) + set(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP}) + get_property(INTERFACE_LINK_LIBRARIES TARGET SDL2 PROPERTY INTERFACE_LINK_LIBRARIES) + set_property(TARGET SDL2 PROPERTY + INTERFACE_LINK_LIBRARIES ${INTERFACE_LINK_LIBRARIES} ${MINGW32_LIBRARY}) + endif () + + # 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 "") +endif () + +include(FindPackageHandleStandardArgs) +find_package_handle_standard_args(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)