mirror of https://github.com/encounter/SDL.git
cmake: rewrite autotools' sdl2-config.cmake.in with IMPORTED targets + no more -lmingw32
This commit is contained in:
Anonymous Maarten
Sam Lantinga
parent
6f3474db2d
commit
246f3ba52c
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@ -1,81 +1,194 @@
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# sdl2 cmake project-config input for ./configure scripts
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# sdl2 cmake project-config input for ./configure script
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set(prefix "@prefix@")
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include(FeatureSummary)
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set_package_properties(SDL2 PROPERTIES
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URL "https://www.libsdl.org/"
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DESCRIPTION "low level access to audio, keyboard, mouse, joystick, and graphics hardware"
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)
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# Copied from `configure_package_config_file`
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macro(set_and_check _var _file)
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set(${_var} "${_file}")
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if(NOT EXISTS "${_file}")
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message(FATAL_ERROR "File or directory ${_file} referenced by variable ${_var} does not exist !")
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endif()
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endmacro()
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# Copied from `configure_package_config_file`
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macro(check_required_components _NAME)
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foreach(comp ${${_NAME}_FIND_COMPONENTS})
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if(NOT ${_NAME}_${comp}_FOUND)
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if(${_NAME}_FIND_REQUIRED_${comp})
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set(${_NAME}_FOUND FALSE)
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endif()
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endif()
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endforeach()
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endmacro()
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get_filename_component(prefix "${CMAKE_CURRENT_LIST_DIR}@cmake_prefix_relpath@" ABSOLUTE)
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set(exec_prefix "@exec_prefix@")
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set(bindir "@bindir@")
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set(libdir "@libdir@")
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set(includedir "@includedir@")
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set(SDL2_PREFIX "${prefix}")
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set(SDL2_EXEC_PREFIX "${exec_prefix}")
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set(SDL2_LIBDIR "${libdir}")
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set(SDL2_INCLUDE_DIRS "${includedir}/SDL2")
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set(SDL2_LIBRARIES "-L${SDL2_LIBDIR} @SDL_RLD_FLAGS@ @SDL_LIBS@")
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string(STRIP "${SDL2_LIBRARIES}" SDL2_LIBRARIES)
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if(NOT TARGET SDL2::SDL2)
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# provide SDL2::SDL2, SDL2::SDL2main and SDL2::SDL2-static targets, like SDL2Config.cmake does, for compatibility
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set_and_check(SDL2_PREFIX "${prefix}")
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set_and_check(SDL2_EXEC_PREFIX "${exec_prefix}")
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set_and_check(SDL2_BINDIR "${bindir}")
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set_and_check(SDL2_INCLUDE_DIR "${includedir}/SDL2")
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set_and_check(SDL2_LIBDIR "${libdir}")
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set(SDL2_INCLUDE_DIRS "${includedir};${SDL2_INCLUDE_DIR}")
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# Remove -lSDL2 as that is handled by CMake, note the space at the end so it does not replace e.g. -lSDL2main
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# This may require "libdir" beeing set (from above)
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string(REPLACE "-lSDL2 " "" SDL2_EXTRA_LINK_FLAGS "@SDL_RLD_FLAGS@ @SDL_LIBS@ ")
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# also get rid of -lSDL2main, if you want to link against that use both SDL2::SDL2main and SDL2::SDL2 (in that order)
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# (SDL2Config.cmake has the same behavior)
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string(REPLACE "-lSDL2main" "" SDL2_EXTRA_LINK_FLAGS ${SDL2_EXTRA_LINK_FLAGS})
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string(STRIP "${SDL2_EXTRA_LINK_FLAGS}" SDL2_EXTRA_LINK_FLAGS)
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string(REPLACE "-lSDL2 " "" SDL2_EXTRA_LINK_FLAGS_STATIC "@SDL_STATIC_LIBS@ ")
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string(STRIP "${SDL2_EXTRA_LINK_FLAGS_STATIC}" SDL2_EXTRA_LINK_FLAGS_STATIC)
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set(SDL2_LIBRARIES SDL2::SDL2)
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set(SDL2_STATIC_LIBRARIES SDL2::SDL2-static)
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set(SDL2MAIN_LIBRARY)
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set(SDL2TEST_LIBRARY SDL2::SDL2test)
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if(WIN32 AND NOT MSVC)
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# MINGW needs very special handling, because the link order must be exactly -lmingw32 -lSDL2main -lSDL2
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# for it to work at all (and -mwindows somewhere); a normal SHARED IMPORTED or STATIC IMPORTED library always puts itself first
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# so handle this like a header-only lib and put everything in INTERFACE_LINK_LIBRARIES
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unset(prefix)
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unset(exec_prefix)
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unset(bindir)
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unset(libdir)
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unset(includedir)
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add_library(SDL2::SDL2 INTERFACE IMPORTED)
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set_target_properties(SDL2::SDL2 PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}"
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INTERFACE_LINK_LIBRARIES "-L${SDL2_LIBDIR} -lSDL2")
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set(_sdl2_libraries "@SDL_LIBS@")
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set(_sdl2_static_private_libs "@SDL_STATIC_LIBS@")
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add_library(SDL2::SDL2main INTERFACE IMPORTED)
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set_target_properties(SDL2::SDL2main PROPERTIES
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INTERFACE_LINK_LIBRARIES "-L${SDL2_LIBDIR} -lmingw32 -lSDL2main -mwindows")
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# Convert _sdl2_libraries to list and keep only libraries
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string(REGEX MATCHALL "-[lm]([a-zA-Z0-9._]+)" _sdl2_libraries "${_sdl2_libraries}")
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string(REGEX REPLACE "^-l" "" _sdl2_libraries "${_sdl2_libraries}")
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string(REGEX REPLACE ";-l" ";" _sdl2_libraries "${_sdl2_libraries}")
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else() # (not WIN32) or MSVC
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# Convert _sdl2_static_private_libs to list and keep only libraries
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string(REGEX MATCHALL "(-[lm]([a-zA-Z0-9._]+))|(-Wl,[^ ]*framework[^ ]*)" _sdl2_static_private_libs "${_sdl2_static_private_libs}")
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string(REGEX REPLACE "^-l" "" _sdl2_static_private_libs "${_sdl2_static_private_libs}")
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string(REGEX REPLACE ";-l" ";" _sdl2_static_private_libs "${_sdl2_static_private_libs}")
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add_library(SDL2::SDL2 SHARED IMPORTED)
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set_target_properties(SDL2::SDL2 PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}"
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_SHARED_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}")
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if(MSVC)
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# This file is generated when building SDL2 with autotools and MinGW, and MinGW/dlltool
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# isn't able to generate .lib files that are usable by recent MSVC versions
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# (something about "module unsafe for SAFESEH"; SAFESEH is enabled by default in MSVC).
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# The .lib file for SDL2.dll *could* be generated with `gendef SDL2.dll` and then
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# `lib.exe /machine:x86 /def:SDL2.def /out:SDL2.lib` (or /machine:amd64)
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# but that requires lib.exe from a Visual Studio installation - and that still doesn't
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# give you a static SDL2main.lib with SAFESEH support that you'll need (unless you don't use SDL2main)
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# Note that when building SDL2 with CMake and MSVC, the result works with both MinGW and MSVC.
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message(FATAL_ERROR, "This build of libSDL2 only supports MinGW, not MSVC (Visual C++), because it lacks .lib files!")
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# MSVC needs SDL2.lib set as IMPORTED_IMPLIB to link against (comment out message() call above if you added SDL2.lib yourself)
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set_target_properties(SDL2::SDL2 PROPERTIES IMPORTED_IMPLIB "${SDL2_LIBDIR}/SDL2.lib")
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if(_sdl2_libraries MATCHES ".*SDL2main.*")
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list(INSERT SDL2_LIBRARIES 0 SDL2::SDL2main)
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list(INSERT SDL2_STATIC_LIBRARIES 0 SDL2::SDL2main)
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set(_sdl2main_library ${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2main${CMAKE_STATIC_LIBRARY_SUFFIX})
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if(EXISTS "${_sdl2main_library}")
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set(SDL2MAIN_LIBRARY SDL2::SDL2main)
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if(NOT TARGET SDL2::SDL2main)
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add_library(SDL2::SDL2main STATIC IMPORTED)
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set_target_properties(SDL2::SDL2main
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PROPERTIES
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IMPORTED_LOCATION "${_sdl2main_library}"
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)
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if(WIN32)
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# INTERFACE_LINK_OPTIONS needs CMake 3.13
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cmake_minimum_required(VERSION 3.13)
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# Mark WinMain/WinMain@16 as undefined, such that it will be withheld by the linker.
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if(CMAKE_SIZEOF_VOID_P EQUAL 4)
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set_target_properties(SDL2::SDL2main
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PROPERTIES
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INTERFACE_LINK_OPTIONS "-Wl,--undefined=_WinMain@16"
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)
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else()
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# this mustn't be set for MSVC, so do it here in an extra call here
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set_target_properties(SDL2::SDL2 PROPERTIES INTERFACE_LINK_LIBRARIES "${SDL2_EXTRA_LINK_FLAGS}")
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set_target_properties(SDL2::SDL2main
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PROPERTIES
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INTERFACE_LINK_OPTIONS "-Wl,--undefined=WinMain"
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)
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endif()
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endif()
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endif()
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set(SDL2_SDL2main_FOUND TRUE)
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else()
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set(SDL2_SDL2main_FOUND FALSE)
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endif()
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unset(_sdl2main_library)
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endif()
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add_library(SDL2::SDL2main STATIC IMPORTED)
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set_target_properties(SDL2::SDL2main PROPERTIES
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# Remove SDL2 since this is the "central" library
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# Remove SDL2main since this will be provided by SDL2::SDL2main (if available)
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# Remove mingw32 and cygwin since these are not needed when using `-Wl,--undefined,WinMain`
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set(_sdl2_link_libraries ${_sdl2_libraries})
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list(REMOVE_ITEM _sdl2_link_libraries SDL2 SDL2main mingw32 cygwin)
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if(WIN32)
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set(_sdl2_implib "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}")
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set(_sdl2_dll "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}")
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if(EXISTS "${_sdl2_implib}" AND EXISTS "${_sdl2_dll}")
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if(NOT TARGET SDL2::SDL2)
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add_library(SDL2::SDL2 SHARED IMPORTED)
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set_target_properties(SDL2::SDL2 PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}"
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INTERFACE_LINK_LIBRARIES "${_sdl2_link_libraries}"
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2main${CMAKE_STATIC_LIBRARY_SUFFIX}")
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endif() # (not WIN32) or MSVC
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IMPORTED_IMPLIB "${_sdl2_implib}"
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IMPORTED_LOCATION "${_sdl2_dll}"
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)
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endif()
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set(SDL2_SDL2_FOUND TRUE)
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else()
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set(SDL2_SDL2_FOUND FALSE)
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endif()
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unset(_sdl2_implib)
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unset(_sdl2_dll)
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else()
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set(_sdl2_shared "${SDL2_LIBDIR}/${CMAKE_SHARED_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}")
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if(EXISTS "${_sdl2_shared}")
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if(NOT TARGET SDL2::SDL2)
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add_library(SDL2::SDL2 SHARED IMPORTED)
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set_target_properties(SDL2::SDL2 PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}"
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INTERFACE_LINK_LIBRARIES "${_sdl2_link_libraries}"
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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IMPORTED_LOCATION "${_sdl2_shared}"
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)
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endif()
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set(SDL2_SDL2_FOUND TRUE)
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else()
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set(SDL2_SDL2_FOUND FALSE)
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endif()
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unset(_sdl2_shared)
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endif()
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set(_sdl2_static "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_STATIC_LIBRARY_SUFFIX}")
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if(EXISTS "${_sdl2_static}")
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if(NOT TARGET SDL2::SDL2-static)
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add_library(SDL2::SDL2-static STATIC IMPORTED)
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set_target_properties(SDL2::SDL2-static PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}"
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set_target_properties(SDL2::SDL2-static
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PROPERTIES
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IMPORTED_LOCATION "${_sdl2_static}"
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}"
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INTERFACE_LINK_LIBRARIES "${_sdl2_link_libraries};${_sdl2_static_private_libs}"
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_STATIC_LIBRARY_SUFFIX}"
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INTERFACE_LINK_LIBRARIES "${SDL2_EXTRA_LINK_FLAGS_STATIC}")
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)
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endif()
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set(SDL2_SDL2-static_FOUND TRUE)
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else()
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set(SDL2_SDL2-static_FOUND FALSE)
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endif()
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unset(_sdl2_static)
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endif() # NOT TARGET SDL2::SDL2
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unset(_sdl2_link_libraries)
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set(_sdl2test_library "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2_test${CMAKE_STATIC_LIBRARY_SUFFIX}")
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if(EXISTS "${_sdl2test_library}")
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if(NOT TARGET SDL2::SDL2test)
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add_library(SDL2::SDL2test STATIC IMPORTED)
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set_target_properties(SDL2::SDL2test
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PROPERTIES
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IMPORTED_LOCATION "_sdl2test_library"
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}"
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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)
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endif()
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set(SDL2_SDL2test_FOUND TRUE)
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else()
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set(SDL2_SDL2test_FOUND FALSE)
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endif()
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unset(_sdl2test_library)
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# Copied from `configure_package_config_file`
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macro(check_required_components _NAME)
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foreach(comp ${${_NAME}_FIND_COMPONENTS})
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if(NOT ${_NAME}_${comp}_FOUND)
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if(${_NAME}_FIND_REQUIRED_${comp})
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set(${_NAME}_FOUND FALSE)
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endif()
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endif()
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endforeach()
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endmacro()
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check_required_components(SDL2)
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