.

Android/app/build.gradle

@@ -24,7 +24,7 @@ android {
             }
         }
 
-        project.tasks.preBuild.dependsOn("webProd")
+//        project.tasks.preBuild.dependsOn("webProd")
 
         ndk {
             abiFilters "armeabi-v7a", "x86", "arm64-v8a", "x86_64"

Android/app/src/main/cpp/Android.mk

@@ -5,13 +5,30 @@ LOCAL_MODULE    := libshell
 LOCAL_SRC_FILES := shell.cpp
 include $(BUILD_SHARED_LIBRARY)
 
-include $(CLEAR_VARS)
-LOCAL_MODULE    := libproperties
-LOCAL_SRC_FILES := properties.cpp
-include $(BUILD_SHARED_LIBRARY)
-
 include $(CLEAR_VARS)
 LOCAL_MODULE    := libclog
 LOCAL_SRC_FILES := clog.cpp
 LOCAL_LDLIBS := -llog
-include $(BUILD_SHARED_LIBRARY)
+include $(BUILD_SHARED_LIBRARY)
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE:= libsystemproperties
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)
+LOCAL_STATIC_LIBRARIES := libcxx
+LOCAL_CFLAGS := -std=c++17
+LOCAL_SRC_FILES := \
+	properties.cpp \
+    context_node.cpp \
+    contexts_serialized.cpp \
+    contexts_split.cpp \
+    prop_area.cpp \
+    prop_info.cpp \
+    system_properties.cpp \
+    system_property_api.cpp \
+    system_property_set.cpp \
+    property_info_parser.cpp
+
+include $(BUILD_STATIC_LIBRARY)

Android/app/src/main/cpp/properties.cpp

@@ -1,10 +1,12 @@
 #include <jni.h>
 #include <cstring>
 #include <sys/system_properties.h>
-//#include <cutils/properties.h>
+//#include <system_properties.h>
+
+#define JNICALL
 
 extern "C"
-JNIEXPORT jstring JNICALL
+JNIEXPORT jstring  extern "C" JNICALL
 Java_com_dergoogler_core_NativeProperties_get(JNIEnv *env, jclass clazz, jstring key,
                                                       jstring def) {
     const char *myKey = env->GetStringUTFChars(key, 0);