Android.mk: Build android SDL2.so with `-Wl,--no-undefined`

Android.mk

@@ -81,6 +81,8 @@ LOCAL_CFLAGS += -Wno-unused-parameter -Wno-sign-compare
 
 LOCAL_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -lOpenSLES -llog -landroid
 
+LOCAL_LDFLAGS := -Wl,--no-undefined
+
 ifeq ($(NDK_DEBUG),1)
     cmd-strip :=
 endif
@@ -99,7 +101,10 @@ LOCAL_MODULE := SDL2_static
 
 LOCAL_MODULE_FILENAME := libSDL2
 
-LOCAL_LDLIBS := 
+LOCAL_LDLIBS :=
+
+LOCAL_LDFLAGS :=
+
 LOCAL_EXPORT_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -llog -landroid
 
 include $(BUILD_STATIC_LIBRARY)