diff --git a/android_binary_only/jni/Android.mk b/android_binary_only/jni/Android.mk
index 645651a5..7e73b23d 100755
--- a/android_binary_only/jni/Android.mk
+++ b/android_binary_only/jni/Android.mk
@@ -26,43 +26,43 @@ include $(BUILD_EXECUTABLE)
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 LOCAL_MODULE := boost_system
-LOCAL_SRC_FILES := $(BOOST_PATH)/boost_1_64_0/$(TARGET_ARCH_ABI)/lib/libboost_system.a
-LOCAL_EXPORT_C_INCLUDES := $(BOOST_PATH)/boost_1_64_0/include
+LOCAL_SRC_FILES := $(BOOST_PATH)/boost_1_68_0-clang/$(TARGET_ARCH_ABI)/lib/libboost_system.a
+LOCAL_EXPORT_C_INCLUDES := $(BOOST_PATH)/boost_1_68_0-clang/include
 include $(PREBUILT_STATIC_LIBRARY)
 
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 LOCAL_MODULE := boost_date_time
-LOCAL_SRC_FILES := $(BOOST_PATH)/boost_1_64_0/$(TARGET_ARCH_ABI)/lib/libboost_date_time.a
-LOCAL_EXPORT_C_INCLUDES := $(BOOST_PATH)/boost_1_64_0/include
+LOCAL_SRC_FILES := $(BOOST_PATH)/boost_1_68_0-clang/$(TARGET_ARCH_ABI)/lib/libboost_date_time.a
+LOCAL_EXPORT_C_INCLUDES := $(BOOST_PATH)/boost_1_68_0-clang/include
 include $(PREBUILT_STATIC_LIBRARY)
 
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 LOCAL_MODULE := boost_filesystem
-LOCAL_SRC_FILES := $(BOOST_PATH)/boost_1_64_0/$(TARGET_ARCH_ABI)/lib/libboost_filesystem.a
-LOCAL_EXPORT_C_INCLUDES := $(BOOST_PATH)/boost_1_64_0/include
+LOCAL_SRC_FILES := $(BOOST_PATH)/boost_1_68_0-clang/$(TARGET_ARCH_ABI)/lib/libboost_filesystem.a
+LOCAL_EXPORT_C_INCLUDES := $(BOOST_PATH)/boost_1_68_0-clang/include
 include $(PREBUILT_STATIC_LIBRARY)
 
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 LOCAL_MODULE := boost_program_options
-LOCAL_SRC_FILES := $(BOOST_PATH)/boost_1_64_0/$(TARGET_ARCH_ABI)/lib/libboost_program_options.a
-LOCAL_EXPORT_C_INCLUDES := $(BOOST_PATH)/boost_1_64_0/include
+LOCAL_SRC_FILES := $(BOOST_PATH)/boost_1_68_0-clang/$(TARGET_ARCH_ABI)/lib/libboost_program_options.a
+LOCAL_EXPORT_C_INCLUDES := $(BOOST_PATH)/boost_1_68_0-clang/include
 include $(PREBUILT_STATIC_LIBRARY)
 
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 LOCAL_MODULE := crypto
-LOCAL_SRC_FILES := $(OPENSSL_PATH)/openssl-1.1.1/$(TARGET_ARCH_ABI)/lib/libcrypto.a
-LOCAL_EXPORT_C_INCLUDES := $(OPENSSL_PATH)/openssl-1.1.1/include
+LOCAL_SRC_FILES := $(OPENSSL_PATH)/openssl-1.1.1a-clang/$(TARGET_ARCH_ABI)/lib/libcrypto.a
+LOCAL_EXPORT_C_INCLUDES := $(OPENSSL_PATH)/openssl-1.1.1a-clang/include
 include $(PREBUILT_STATIC_LIBRARY)
 
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 LOCAL_MODULE := ssl
-LOCAL_SRC_FILES := $(OPENSSL_PATH)/openssl-1.1.1/$(TARGET_ARCH_ABI)/lib/libssl.a
-LOCAL_EXPORT_C_INCLUDES := $(OPENSSL_PATH)/openssl-1.1.1/include
+LOCAL_SRC_FILES := $(OPENSSL_PATH)/openssl-1.1.1a-clang/$(TARGET_ARCH_ABI)/lib/libssl.a
+LOCAL_EXPORT_C_INCLUDES := $(OPENSSL_PATH)/openssl-1.1.1a-clang/include
 LOCAL_STATIC_LIBRARIES := crypto
 include $(PREBUILT_STATIC_LIBRARY)
 
diff --git a/android_binary_only/jni/Application.mk b/android_binary_only/jni/Application.mk
index b8cdc2ab..9b437f6a 100755
--- a/android_binary_only/jni/Application.mk
+++ b/android_binary_only/jni/Application.mk
@@ -6,11 +6,8 @@ APP_ABI := armeabi-v7a
 #can be android-3 but will fail for x86 since arch-x86 is not present at ndkroot/platforms/android-3/ . libz is taken from there.
 APP_PLATFORM := android-14
 
-# http://stackoverflow.com/a/21386866/529442 http://stackoverflow.com/a/15616255/529442 to enable c++11 support in Eclipse
-NDK_TOOLCHAIN_VERSION := 4.9
-# APP_STL := stlport_shared  --> does not seem to contain C++11 features
-#APP_STL := gnustl_shared
-APP_STL := gnustl_static
+NDK_TOOLCHAIN_VERSION := clang
+APP_STL := c++_static
 
 # Enable c++11 extensions in source code
 APP_CPPFLAGS += -std=c++11 -fvisibility=default -fPIE