Make SDL2Config.cmake export SDL2_LIBRARIES etc (on Windows)
still WIP and other platforms than windows still TODO and open questions etc see https://github.com/libsdl-org/SDL/issues/4004main
Daniel Gibson
Sam Lantinga
parent
f9bf1aeba8
commit
3ea11f9acb
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@ -1 +1,96 @@
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include("${CMAKE_CURRENT_LIST_DIR}/SDL2Targets.cmake")
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# cuts off the path at the last (back)slash
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function(my_dirname FILEPATH RETVAL)
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string(FIND ${FILEPATH} "/" slashPos REVERSE)
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string(FIND ${FILEPATH} "\\" bsPos REVERSE) # TODO: untested, cmake always gave me forward slashes
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if(DEFINED slashPos)
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if( (DEFINED bsPos) AND (${bsPos} GREATER ${slashPos}) )
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set(slashPos, ${bsPos})
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endif()
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elseif(DEFINED bsPos)
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set(slashPos, ${bsPos})
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endif()
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if(DEFINED slashPos)
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string(SUBSTRING ${FILEPATH} 0 ${slashPos} dirname)
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set(${RETVAL} ${dirname} PARENT_SCOPE)
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endif()
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endfunction()
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if(WIN32)
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# this seems to work for both MSVC and MINGW+MSYS and with both SDL2Config/Target.cmake from vcpkg
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# and from building myself with cmake from latest git
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# ok, 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 .lib files for both SDL2 and SDL2main
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# they could be in lots of different properties..
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get_target_property(sdl2implib SDL2::SDL2 IMPORTED_IMPLIB_RELEASE)
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get_target_property(sdl2implibdbg SDL2::SDL2 IMPORTED_IMPLIB_DEBUG)
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# TODO: for all this bla_RELEASE bla_DEBUG etc stuff, maybe only try the ones
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# from get_target_property(available_configs SDL2::SDL2 IMPORTED_CONFIGURATIONS) ?
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# OR otherwise at least try all of NOCONFIG, RELEASE, MINSIZEREL, RELWITHDEBINFO, DEBUG (possibly in that order)?
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get_target_property(sdl2mainimplib SDL2::SDL2main IMPORTED_IMPLIB_RELEASE)
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if(NOT sdl2mainimplib)
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get_target_property(sdl2mainimplib SDL2::SDL2main IMPORTED_LOCATION_RELEASE)
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endif()
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get_target_property(sdl2mainimplibdbg SDL2::SDL2main IMPORTED_IMPLIB_DEBUG)
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if(NOT sdl2mainimplibdbg)
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get_target_property(sdl2mainimplibdbg SDL2::SDL2main IMPORTED_LOCATION_DEBUG)
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endif()
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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) # try to get it from other properties
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foreach(prop IMPORTED_IMPLIB IMPORTED_IMPLIB_NOCONFIG IMPORTED_IMPLIB_DEBUG IMPORTED_LOCATION_RELEASE IMPORTED_LOCATION_DEBUG)
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get_target_property(sdl2implib SDL2::SDL2 ${prop})
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if(sdl2implib)
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message(STATUS "succeeded with ${prop} => ${sdl2implib}")
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break()
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endif()
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message(STATUS "no luck with ${prop}")
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endforeach()
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endif()
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if(NOT sdl2mainimplib)
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foreach(prop IMPORTED_IMPLIB IMPORTED_IMPLIB_NOCONFIG IMPORTED_IMPLIB_DEBUG IMPORTED_LOCATION_RELEASE IMPORTED_LOCATION_DEBUG)
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get_target_property(sdl2mainimplib SDL2::SDL2main ${prop})
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if(sdl2mainimplib)
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message(STATUS "succeeded with ${prop} => ${sdl2mainimplib}")
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break()
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endif()
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message(STATUS "no luck with ${prop}")
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endforeach()
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endif()
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if( sdl2implib AND sdl2mainimplib )
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set(SDL2_LIBRARIES ${sdl2mainimplib} ${sdl2implib})
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else()
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message(FATAL_ERROR, "SDL2::SDL2 and/or SDL2::SDL2main don't seem to contain any kind of IMPORTED_IMPLIB")
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endif()
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endif()
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# NOTE: SDL2_LIBRARIES now looks like "c:/path/to/SDL2main.lib;c:/path/to/SDL2.lib"
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# which is different to what it looks like when coming from sdl2-config.cmake
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# (there it's more like "-L${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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my_dirname(${sdl2implib} SDL2_LIBDIR)
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my_dirname(${SDL2_LIBDIR} SDL2_EXEC_PREFIX) # 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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set(SDL2_PREFIX ${SDL2_PREFIX}) # TODO: could this be somewhere else? parent dir of include or sth?
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elseif() # not windows
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# TODO: about the same but don't have to look at *_IMPLIB* as that's windows specific, it should be in IMPORTED_LOCATION*
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# TODO: make SDL2_LIBRARIES look more like the original (instead of path to libSDL2.so)?
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# TODO: anything special about macOS? I can't test that, I have no Mac
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endif()
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@ -23,7 +23,8 @@ if(NOT TARGET SDL2::SDL2)
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INTERFACE_INCLUDE_DIRECTORIES "@includedir@/SDL2"
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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IMPORTED_LOCATION "@libdir@/${CMAKE_SHARED_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}"
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INTERFACE_LINK_LIBRARIES "${SDL2_EXTRA_LINK_FLAGS}")
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# TODO: on windows set IMPORTED_IMPLIB to SDL2.lib
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INTERFACE_LINK_LIBRARIES "${SDL2_EXTRA_LINK_FLAGS}") # TODO: really? SDL2Config.cmake doesn't do this
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add_library(SDL2::SDL2-static STATIC IMPORTED)
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set_target_properties(SDL2::SDL2-static PROPERTIES
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