build.rs: emit rerun-if-changed lines for compiled C/C++ code

android-activity/build.rs

@@ -1,19 +1,33 @@
 #![allow(dead_code)]
 
 fn build_glue_for_game_activity() {
+    for f in [
+        "GameActivity.h",
+        "GameActivity.cpp",
+    ] {
+        println!("cargo:rerun-if-changed=game-activity-csrc/game-activity/{f}");
+    }
     cc::Build::new()
         .cpp(true)
         .include("game-activity-csrc")
         .file("game-activity-csrc/game-activity/GameActivity.cpp")
         .extra_warnings(false)
         .cpp_link_stdlib("c++_static")
         .compile("libgame_activity.a");
+
+    for f in ["gamecommon.h", "gametextinput.h", "gametextinput.cpp"] {
+        println!("cargo:rerun-if-changed=game-activity-csrc/game-text-input/{f}");
+    }
     cc::Build::new()
         .cpp(true)
         .include("game-activity-csrc")
         .file("game-activity-csrc/game-text-input/gametextinput.cpp")
         .cpp_link_stdlib("c++_static")
         .compile("libgame_text_input.a");
+
+    for f in ["android_native_app_glue.h", "android_native_app_glue.c"] {
+        println!("cargo:rerun-if-changed=game-activity-csrc/native_app_glue/{f}");
+    }
     cc::Build::new()
         .include("game-activity-csrc")
         .include("game-activity-csrc/game-activity/native_app_glue")