diff --git a/sdl2-config.cmake.in b/sdl2-config.cmake.in index c570511fa..16a2520be 100644 --- a/sdl2-config.cmake.in +++ b/sdl2-config.cmake.in @@ -1,81 +1,194 @@ -# sdl2 cmake project-config input for ./configure scripts +# sdl2 cmake project-config input for ./configure script -set(prefix "@prefix@") +include(FeatureSummary) +set_package_properties(SDL2 PROPERTIES + URL "https://www.libsdl.org/" + DESCRIPTION "low level access to audio, keyboard, mouse, joystick, and graphics hardware" +) + +# Copied from `configure_package_config_file` +macro(set_and_check _var _file) + set(${_var} "${_file}") + if(NOT EXISTS "${_file}") + message(FATAL_ERROR "File or directory ${_file} referenced by variable ${_var} does not exist !") + endif() +endmacro() + +# Copied from `configure_package_config_file` +macro(check_required_components _NAME) + foreach(comp ${${_NAME}_FIND_COMPONENTS}) + if(NOT ${_NAME}_${comp}_FOUND) + if(${_NAME}_FIND_REQUIRED_${comp}) + set(${_NAME}_FOUND FALSE) + endif() + endif() + endforeach() +endmacro() + +get_filename_component(prefix "${CMAKE_CURRENT_LIST_DIR}@cmake_prefix_relpath@" ABSOLUTE) set(exec_prefix "@exec_prefix@") +set(bindir "@bindir@") set(libdir "@libdir@") set(includedir "@includedir@") -set(SDL2_PREFIX "${prefix}") -set(SDL2_EXEC_PREFIX "${exec_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) -if(NOT TARGET SDL2::SDL2) - # provide SDL2::SDL2, SDL2::SDL2main and SDL2::SDL2-static targets, like SDL2Config.cmake does, for compatibility +set_and_check(SDL2_PREFIX "${prefix}") +set_and_check(SDL2_EXEC_PREFIX "${exec_prefix}") +set_and_check(SDL2_BINDIR "${bindir}") +set_and_check(SDL2_INCLUDE_DIR "${includedir}/SDL2") +set_and_check(SDL2_LIBDIR "${libdir}") +set(SDL2_INCLUDE_DIRS "${includedir};${SDL2_INCLUDE_DIR}") - # Remove -lSDL2 as that is handled by CMake, note the space at the end so it does not replace e.g. -lSDL2main - # This may require "libdir" beeing set (from above) - string(REPLACE "-lSDL2 " "" SDL2_EXTRA_LINK_FLAGS "@SDL_RLD_FLAGS@ @SDL_LIBS@ ") - # also get rid of -lSDL2main, if you want to link against that use both SDL2::SDL2main and SDL2::SDL2 (in that order) - # (SDL2Config.cmake has the same behavior) - string(REPLACE "-lSDL2main" "" SDL2_EXTRA_LINK_FLAGS ${SDL2_EXTRA_LINK_FLAGS}) - string(STRIP "${SDL2_EXTRA_LINK_FLAGS}" SDL2_EXTRA_LINK_FLAGS) - string(REPLACE "-lSDL2 " "" SDL2_EXTRA_LINK_FLAGS_STATIC "@SDL_STATIC_LIBS@ ") - string(STRIP "${SDL2_EXTRA_LINK_FLAGS_STATIC}" SDL2_EXTRA_LINK_FLAGS_STATIC) +set(SDL2_LIBRARIES SDL2::SDL2) +set(SDL2_STATIC_LIBRARIES SDL2::SDL2-static) +set(SDL2MAIN_LIBRARY) +set(SDL2TEST_LIBRARY SDL2::SDL2test) -if(WIN32 AND NOT MSVC) - # MINGW needs very special handling, because the link order must be exactly -lmingw32 -lSDL2main -lSDL2 - # for it to work at all (and -mwindows somewhere); a normal SHARED IMPORTED or STATIC IMPORTED library always puts itself first - # so handle this like a header-only lib and put everything in INTERFACE_LINK_LIBRARIES +unset(prefix) +unset(exec_prefix) +unset(bindir) +unset(libdir) +unset(includedir) - add_library(SDL2::SDL2 INTERFACE IMPORTED) - set_target_properties(SDL2::SDL2 PROPERTIES - INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}" - INTERFACE_LINK_LIBRARIES "-L${SDL2_LIBDIR} -lSDL2") +set(_sdl2_libraries "@SDL_LIBS@") +set(_sdl2_static_private_libs "@SDL_STATIC_LIBS@") - add_library(SDL2::SDL2main INTERFACE IMPORTED) - set_target_properties(SDL2::SDL2main PROPERTIES - INTERFACE_LINK_LIBRARIES "-L${SDL2_LIBDIR} -lmingw32 -lSDL2main -mwindows") +# Convert _sdl2_libraries to list and keep only libraries +string(REGEX MATCHALL "-[lm]([a-zA-Z0-9._]+)" _sdl2_libraries "${_sdl2_libraries}") +string(REGEX REPLACE "^-l" "" _sdl2_libraries "${_sdl2_libraries}") +string(REGEX REPLACE ";-l" ";" _sdl2_libraries "${_sdl2_libraries}") -else() # (not WIN32) or MSVC +# Convert _sdl2_static_private_libs to list and keep only libraries +string(REGEX MATCHALL "(-[lm]([a-zA-Z0-9._]+))|(-Wl,[^ ]*framework[^ ]*)" _sdl2_static_private_libs "${_sdl2_static_private_libs}") +string(REGEX REPLACE "^-l" "" _sdl2_static_private_libs "${_sdl2_static_private_libs}") +string(REGEX REPLACE ";-l" ";" _sdl2_static_private_libs "${_sdl2_static_private_libs}") - add_library(SDL2::SDL2 SHARED IMPORTED) - set_target_properties(SDL2::SDL2 PROPERTIES - INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}" - IMPORTED_LINK_INTERFACE_LANGUAGES "C" - IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_SHARED_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}") - - if(MSVC) - # This file is generated when building SDL2 with autotools and MinGW, and MinGW/dlltool - # isn't able to generate .lib files that are usable by recent MSVC versions - # (something about "module unsafe for SAFESEH"; SAFESEH is enabled by default in MSVC). - # The .lib file for SDL2.dll *could* be generated with `gendef SDL2.dll` and then - # `lib.exe /machine:x86 /def:SDL2.def /out:SDL2.lib` (or /machine:amd64) - # but that requires lib.exe from a Visual Studio installation - and that still doesn't - # give you a static SDL2main.lib with SAFESEH support that you'll need (unless you don't use SDL2main) - # Note that when building SDL2 with CMake and MSVC, the result works with both MinGW and MSVC. - - message(FATAL_ERROR, "This build of libSDL2 only supports MinGW, not MSVC (Visual C++), because it lacks .lib files!") - # MSVC needs SDL2.lib set as IMPORTED_IMPLIB to link against (comment out message() call above if you added SDL2.lib yourself) - set_target_properties(SDL2::SDL2 PROPERTIES IMPORTED_IMPLIB "${SDL2_LIBDIR}/SDL2.lib") +if(_sdl2_libraries MATCHES ".*SDL2main.*") + list(INSERT SDL2_LIBRARIES 0 SDL2::SDL2main) + list(INSERT SDL2_STATIC_LIBRARIES 0 SDL2::SDL2main) + set(_sdl2main_library ${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2main${CMAKE_STATIC_LIBRARY_SUFFIX}) + if(EXISTS "${_sdl2main_library}") + set(SDL2MAIN_LIBRARY SDL2::SDL2main) + if(NOT TARGET SDL2::SDL2main) + add_library(SDL2::SDL2main STATIC IMPORTED) + set_target_properties(SDL2::SDL2main + PROPERTIES + IMPORTED_LOCATION "${_sdl2main_library}" + ) + if(WIN32) + # INTERFACE_LINK_OPTIONS needs CMake 3.13 + cmake_minimum_required(VERSION 3.13) + # Mark WinMain/WinMain@16 as undefined, such that it will be withheld by the linker. + if(CMAKE_SIZEOF_VOID_P EQUAL 4) + set_target_properties(SDL2::SDL2main + PROPERTIES + INTERFACE_LINK_OPTIONS "-Wl,--undefined=_WinMain@16" + ) + else() + set_target_properties(SDL2::SDL2main + PROPERTIES + INTERFACE_LINK_OPTIONS "-Wl,--undefined=WinMain" + ) + endif() + endif() + endif() + set(SDL2_SDL2main_FOUND TRUE) else() - # this mustn't be set for MSVC, so do it here in an extra call here - set_target_properties(SDL2::SDL2 PROPERTIES INTERFACE_LINK_LIBRARIES "${SDL2_EXTRA_LINK_FLAGS}") + set(SDL2_SDL2main_FOUND FALSE) endif() + unset(_sdl2main_library) +endif() - add_library(SDL2::SDL2main STATIC IMPORTED) - set_target_properties(SDL2::SDL2main PROPERTIES - IMPORTED_LINK_INTERFACE_LANGUAGES "C" - IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2main${CMAKE_STATIC_LIBRARY_SUFFIX}") +# Remove SDL2 since this is the "central" library +# Remove SDL2main since this will be provided by SDL2::SDL2main (if available) +# Remove mingw32 and cygwin since these are not needed when using `-Wl,--undefined,WinMain` +set(_sdl2_link_libraries ${_sdl2_libraries}) +list(REMOVE_ITEM _sdl2_link_libraries SDL2 SDL2main mingw32 cygwin) -endif() # (not WIN32) or MSVC +if(WIN32) + set(_sdl2_implib "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}") + set(_sdl2_dll "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}") + if(EXISTS "${_sdl2_implib}" AND EXISTS "${_sdl2_dll}") + if(NOT TARGET SDL2::SDL2) + add_library(SDL2::SDL2 SHARED IMPORTED) + set_target_properties(SDL2::SDL2 PROPERTIES + INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}" + INTERFACE_LINK_LIBRARIES "${_sdl2_link_libraries}" + IMPORTED_LINK_INTERFACE_LANGUAGES "C" + IMPORTED_IMPLIB "${_sdl2_implib}" + IMPORTED_LOCATION "${_sdl2_dll}" + ) + endif() + set(SDL2_SDL2_FOUND TRUE) + else() + set(SDL2_SDL2_FOUND FALSE) + endif() + unset(_sdl2_implib) + unset(_sdl2_dll) +else() + set(_sdl2_shared "${SDL2_LIBDIR}/${CMAKE_SHARED_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}") + if(EXISTS "${_sdl2_shared}") + if(NOT TARGET SDL2::SDL2) + add_library(SDL2::SDL2 SHARED IMPORTED) + set_target_properties(SDL2::SDL2 PROPERTIES + INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}" + INTERFACE_LINK_LIBRARIES "${_sdl2_link_libraries}" + IMPORTED_LINK_INTERFACE_LANGUAGES "C" + IMPORTED_LOCATION "${_sdl2_shared}" + ) + endif() + set(SDL2_SDL2_FOUND TRUE) + else() + set(SDL2_SDL2_FOUND FALSE) + endif() + unset(_sdl2_shared) +endif() - add_library(SDL2::SDL2-static STATIC IMPORTED) - set_target_properties(SDL2::SDL2-static PROPERTIES - INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}" - IMPORTED_LINK_INTERFACE_LANGUAGES "C" - IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_STATIC_LIBRARY_SUFFIX}" - INTERFACE_LINK_LIBRARIES "${SDL2_EXTRA_LINK_FLAGS_STATIC}") +set(_sdl2_static "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_STATIC_LIBRARY_SUFFIX}") +if(EXISTS "${_sdl2_static}") + if(NOT TARGET SDL2::SDL2-static) + add_library(SDL2::SDL2-static STATIC IMPORTED) + set_target_properties(SDL2::SDL2-static + PROPERTIES + IMPORTED_LOCATION "${_sdl2_static}" + INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}" + INTERFACE_LINK_LIBRARIES "${_sdl2_link_libraries};${_sdl2_static_private_libs}" + IMPORTED_LINK_INTERFACE_LANGUAGES "C" + ) + endif() + set(SDL2_SDL2-static_FOUND TRUE) +else() + set(SDL2_SDL2-static_FOUND FALSE) +endif() +unset(_sdl2_static) -endif() # NOT TARGET SDL2::SDL2 +unset(_sdl2_link_libraries) + +set(_sdl2test_library "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2_test${CMAKE_STATIC_LIBRARY_SUFFIX}") +if(EXISTS "${_sdl2test_library}") + if(NOT TARGET SDL2::SDL2test) + add_library(SDL2::SDL2test STATIC IMPORTED) + set_target_properties(SDL2::SDL2test + PROPERTIES + IMPORTED_LOCATION "_sdl2test_library" + INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}" + IMPORTED_LINK_INTERFACE_LANGUAGES "C" + ) + endif() + set(SDL2_SDL2test_FOUND TRUE) +else() + set(SDL2_SDL2test_FOUND FALSE) +endif() +unset(_sdl2test_library) + +# Copied from `configure_package_config_file` +macro(check_required_components _NAME) + foreach(comp ${${_NAME}_FIND_COMPONENTS}) + if(NOT ${_NAME}_${comp}_FOUND) + if(${_NAME}_FIND_REQUIRED_${comp}) + set(${_NAME}_FOUND FALSE) + endif() + endif() + endforeach() +endmacro() + +check_required_components(SDL2)