Update to SDL2-2.30.6

SDL2Config.cmake.in

@@ -0,0 +1,77 @@
+# sdl2 cmake project-config input for CMakeLists.txt script
+
+include(FeatureSummary)
+set_package_properties(SDL2 PROPERTIES
+  URL "https://www.libsdl.org/"
+  DESCRIPTION "low level access to audio, keyboard, mouse, joystick, and graphics hardware"
+)
+
+@PACKAGE_INIT@
+
+set(SDL2_FOUND TRUE)
+
+if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/SDL2Targets.cmake")
+  include("${CMAKE_CURRENT_LIST_DIR}/SDL2Targets.cmake")
+  set(SDL2_SDL2_FOUND TRUE)
+endif()
+if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/SDL2staticTargets.cmake")
+  if(ANDROID)
+    enable_language(CXX)
+  endif()
+  include("${CMAKE_CURRENT_LIST_DIR}/SDL2staticTargets.cmake")
+  set(SDL2_SDL2-static_FOUND TRUE)
+endif()
+if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/SDL2mainTargets.cmake")
+  include("${CMAKE_CURRENT_LIST_DIR}/SDL2mainTargets.cmake")
+  set(SDL2_SDL2main_FOUND TRUE)
+endif()
+if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/SDL2testTargets.cmake")
+  include("${CMAKE_CURRENT_LIST_DIR}/SDL2testTargets.cmake")
+  set(SDL2_SDL2test_FOUND TRUE)
+endif()
+
+
+include("${CMAKE_CURRENT_LIST_DIR}/sdlfind.cmake")
+
+set(SDL_ALSA @SDL_ALSA@)
+set(SDL_ALSA_SHARED @SDL_ALSA_SHARED@)
+if(SDL_ALSA AND NOT SDL_ALSA_SHARED AND TARGET SDL2::SDL2-static)
+  sdlFindALSA()
+endif()
+unset(SDL_ALSA)
+unset(SDL_ALSA_SHARED)
+
+
+check_required_components(SDL2)
+
+# Create SDL2::SDL2 alias for static-only builds
+if(TARGET SDL2::SDL2-static AND NOT TARGET SDL2::SDL2)
+  if(CMAKE_VERSION VERSION_LESS "3.18")
+    # FIXME: Aliasing local targets is not supported on CMake < 3.18, so make it global.
+    add_library(SDL2::SDL2 INTERFACE IMPORTED)
+    set_target_properties(SDL2::SDL2 PROPERTIES INTERFACE_LINK_LIBRARIES "SDL2::SDL2-static")
+  else()
+    add_library(SDL2::SDL2 ALIAS SDL2::SDL2-static)
+  endif()
+endif()
+
+# For compatibility with autotools sdl2-config.cmake, provide SDL2_* variables.
+
+set(SDL2_PREFIX "@PACKAGE_CMAKE_INSTALL_PREFIX@")
+set(SDL2_EXEC_PREFIX "@PACKAGE_CMAKE_INSTALL_PREFIX@")
+set(SDL2_INCLUDE_DIR "@PACKAGE_CMAKE_INSTALL_FULL_INCLUDEDIR@/SDL2")
+set(SDL2_INCLUDE_DIRS "@PACKAGE_CMAKE_INSTALL_FULL_INCLUDEDIR@;@PACKAGE_CMAKE_INSTALL_FULL_INCLUDEDIR@/SDL2")
+set(SDL2_BINDIR "@PACKAGE_CMAKE_INSTALL_FULL_BINDIR@")
+set(SDL2_LIBDIR "@PACKAGE_CMAKE_INSTALL_FULL_LIBDIR@")
+set(SDL2_LIBRARIES SDL2::SDL2)
+set(SDL2_STATIC_LIBRARIES SDL2::SDL2-static)
+set(SDL2_STATIC_PRIVATE_LIBS)
+
+set(SDL2MAIN_LIBRARY)
+if(TARGET SDL2::SDL2main)
+  set(SDL2MAIN_LIBRARY SDL2::SDL2main)
+  list(INSERT SDL2_LIBRARIES 0 SDL2::SDL2main)
+  list(INSERT SDL2_STATIC_LIBRARIES 0 SDL2::SDL2main)
+endif()
+
+set(SDL2TEST_LIBRARY SDL2::SDL2test)