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0696fc0134
This makes it so that the generated targets are not interdependent, which allows Linux distributions to split libraries into the appropriate subpackages as needed.
120 lines
5.3 KiB
CMake
120 lines
5.3 KiB
CMake
if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/SDL2Targets.cmake")
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include("${CMAKE_CURRENT_LIST_DIR}/SDL2Targets.cmake")
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endif()
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if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/SDL2mainTargets.cmake")
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include("${CMAKE_CURRENT_LIST_DIR}/SDL2mainTargets.cmake")
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endif()
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if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/SDL2staticTargets.cmake")
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include("${CMAKE_CURRENT_LIST_DIR}/SDL2staticTargets.cmake")
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endif()
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# on static-only builds create an alias
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if(NOT TARGET SDL2::SDL2 AND TARGET SDL2::SDL2-static)
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if(CMAKE_VERSION VERSION_LESS "3.18")
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# Aliasing local targets is not supported on CMake < 3.18, so make it global.
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set_target_properties(SDL2::SDL2-static PROPERTIES IMPORTED_GLOBAL TRUE)
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endif()
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add_library(SDL2::SDL2 ALIAS SDL2::SDL2-static)
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endif()
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# provide ${SDL2_LIBRARIES}, ${SDL2_INCLUDE_DIRS} etc, like sdl2-config.cmake does,
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# for compatibility between SDL2 built with autotools and SDL2 built with CMake
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# the following seems to work on Windows for both MSVC and MINGW+MSYS and with both SDL2Config/Target.cmake
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# from vcpkg and from building myself with cmake from latest git
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# AND on Linux when building SDL2 (tested current git) with CMake
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# the headers are easy - but note that this adds both .../include/ and .../include/SDL2/
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# while the SDL2_INCLUDE_DIRS of sdl2-config.cmake only add ...include/SDL2/
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# But at least if building worked with sdl2-config.cmake it will also work with this.
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get_target_property(SDL2_INCLUDE_DIRS SDL2::SDL2 INTERFACE_INCLUDE_DIRECTORIES)
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# get the paths to the files to link against (.lib or .dll.a on Windows, .so or .a on Unix, ...) for both SDL2 and SDL2main
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# for the "normal"/release build they could be in lots of different properties..
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set(relprops IMPORTED_IMPLIB_RELEASE IMPORTED_IMPLIB_NOCONFIG IMPORTED_IMPLIB IMPORTED_IMPLIB_MINSIZEREL IMPORTED_IMPLIB_RELWITHDEBINFO
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IMPORTED_LOCATION_RELEASE IMPORTED_LOCATION_NOCONFIG IMPORTED_LOCATION IMPORTED_LOCATION_MINSIZEREL IMPORTED_LOCATION_RELWITHDEBINFO)
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# fewer possibilities for debug builds
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set(dbgprops IMPORTED_IMPLIB_DEBUG IMPORTED_LOCATION_DEBUG)
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foreach(prop ${relprops})
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get_target_property(sdl2implib SDL2::SDL2 ${prop})
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if(sdl2implib)
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#message("set sdl2implib from ${prop}")
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break()
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endif()
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endforeach()
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foreach(prop ${relprops})
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get_target_property(sdl2mainimplib SDL2::SDL2main ${prop})
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if(sdl2mainimplib)
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#message("set sdl2mainimplib from ${prop}")
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break()
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endif()
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endforeach()
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foreach(prop ${dbgprops})
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get_target_property(sdl2implibdbg SDL2::SDL2 ${prop})
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if(sdl2implibdbg)
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#message("set sdl2implibdbg from ${prop}")
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break()
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endif()
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endforeach()
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foreach(prop ${dbgprops})
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get_target_property(sdl2mainimplibdbg SDL2::SDL2main ${prop})
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if(sdl2mainimplibdbg)
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#message("set sdl2mainimplibdbg from ${prop}")
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break()
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endif()
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endforeach()
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if( sdl2implib AND sdl2mainimplib AND sdl2implibdbg AND sdl2mainimplibdbg )
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# we have both release and debug builds of SDL2 and SDL2main, so use this ugly
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# generator expression in SDL2_LIBRARIES to support both in MSVC, depending on build type configured there
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set(SDL2_LIBRARIES $<IF:$<CONFIG:Debug>,${sdl2mainimplibdbg},${sdl2mainimplib}> $<IF:$<CONFIG:Debug>,${sdl2implibdbg},${sdl2implib}>)
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else()
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if( (NOT sdl2implib) AND sdl2implibdbg ) # if we only have a debug version of the lib
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set(sdl2implib ${sdl2implibdbg})
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endif()
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if( (NOT sdl2mainimplib) AND sdl2mainimplibdbg ) # if we only have a debug version of the lib
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set(sdl2mainimplib ${sdl2mainimplibdbg})
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endif()
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if( sdl2implib AND sdl2mainimplib )
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set(SDL2_LIBRARIES ${sdl2mainimplib} ${sdl2implib})
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elseif(WIN32 OR APPLE) # I think these platforms have a non-dummy SDLmain?
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message(FATAL_ERROR, "SDL2::SDL2 and/or SDL2::SDL2main don't seem to contain any kind of IMPORTED_IMPLIB* or IMPORTED_LOCATION*")
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elseif(sdl2implib) # on other platforms just libSDL2 will hopefully do?
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set(SDL2_LIBRARIES ${sdl2implib})
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message(STATUS, "No SDL2main lib not found, I hope you don't need it..")
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else()
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message(FATAL_ERROR, "SDL2::SDL2 doesn't seem to contain any kind of lib to link against in IMPORTED_IMPLIB* or IMPORTED_LOCATION*")
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endif()
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# TODO: should something like INTERFACE_LINK_LIBRARIES be appended? or wherever -mwindows and things like that
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# might be defined (if they were defined by the CMake build at all; autotools has @SDL_RLD_FLAGS@ @SDL_LIBS@)?
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# LINK_DEPENDS? LINK_FLAGS?
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endif()
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get_filename_component(SDL2_LIBDIR ${sdl2implib} PATH)
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# NOTE: SDL2_LIBRARIES now looks like "c:/path/to/SDL2main.lib;c:/path/to/SDL2.lib"
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# which is different to what it looks like when coming from sdl2-config.cmake
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# (there it's more like "-L${SDL2_LIBDIR} -lSDL2main -lSDL2" - and also -lmingw32 and -mwindows)
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# This seems to work with both MSVC and MinGW though, while the other only worked with MinGW
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# On Linux it looks like "/tmp/sdl2inst/lib/libSDL2main.a;/tmp/sdl2inst/lib/libSDL2-2.0.so.0.14.1" which also seems to work
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# the exec prefix is one level up from lib/ - TODO: really, always? at least on Linux there's /usr/lib/x86_64-bla-blub/libSDL2-asdf.so.0 ..
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get_filename_component(SDL2_EXEC_PREFIX ${SDL2_LIBDIR} PATH)
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set(SDL2_PREFIX ${SDL2_EXEC_PREFIX}) # TODO: could this be somewhere else? parent dir of include or sth?
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unset(sdl2implib)
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unset(sdl2mainimplib)
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unset(sdl2implibdbg)
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unset(sdl2mainimplibdbg)
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unset(relprops)
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unset(dbgprops)
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