cmake: create and install SDL3::Jar target for Android

cmake/SDL3Config.cmake.in

@@ -48,6 +48,11 @@ else()
   endif()
 endif()
 
+if(ANDROID AND EXISTS "${CMAKE_CURRENT_LIST_DIR}/SDL3jarTargets.cmake")
+  include("${CMAKE_CURRENT_LIST_DIR}/SDL3jarTargets.cmake")
+  set(SDL3_Jar_FOUND TRUE)
+endif()
+
 if(SDL3_SDL3-shared_FOUND OR SDL3_SDL3-static_FOUND)
   set(SDL3_SDL3_FOUND TRUE)
 endif()

cmake/SDL3jarTargets.cmake.in

@@ -0,0 +1,10 @@
+@PACKAGE_INIT@
+
+set_and_check(SDL3_JAR "@PACKAGE_SDL_INSTALL_JAVADIR@/SDL3/SDL3-@SDL3_VERSION@.jar")
+
+if(NOT TARGET SDL3::Jar)
+  add_library(SDL3::Jar INTERFACE IMPORTED)
+  set_property(TARGET SDL3::Jar PROPERTY JAR_FILE "${SDL3_JAR}")
+endif()
+
+unset(SDL3_JAR)

cmake/test/CMakeLists.txt

@@ -93,4 +93,8 @@ find_package(SDL3 REQUIRED CONFIG COMPONENTS SDL3)
 add_executable(gui-whatever WIN32 main_gui.c)
 target_link_libraries(gui-whatever PRIVATE SDL3::SDL3)
 
+if(ANDROID)
+    find_package(SDL3 REQUIRED CONFIG COMPONENTS Jar)
+endif()
+
 feature_summary(WHAT ALL)