build android app with llvm

android/AndroidManifest.xml

@@ -1,13 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.purplei2p.i2pd"
-    android:installLocation="auto"
-    android:versionCode="1"
-    android:versionName="2.22.0">
-
-    <uses-sdk
-        android:minSdkVersion="14"
-        android:targetSdkVersion="28" />
+    android:installLocation="auto">
 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.INTERNET" /> <!-- normal perm, per https://developer.android.com/guide/topics/permissions/normal-permissions.html -->
@@ -15,6 +9,7 @@
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <!-- normal perm -->
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" /> <!-- required in API 26+ -->
+
     <application
         android:allowBackup="true"
         android:icon="@drawable/icon"

android/jni/Android.mk

@@ -25,43 +25,43 @@ include $(BUILD_SHARED_LIBRARY)
 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)
 

android/jni/Application.mk

@@ -1,27 +1,21 @@
-#APP_ABI := all
 APP_ABI := armeabi-v7a x86
-#APP_ABI := x86
-#APP_ABI := x86_64
-#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
+# ABI arm64-v8a and x86_64 supported only from platform-21
+#APP_ABI := arm64-v8a x86_64
+#APP_PLATFORM := android-21
+
+NDK_TOOLCHAIN_VERSION := clang
+APP_STL := c++_shared
 
 # Enable c++11 extensions in source code
-APP_CPPFLAGS += -std=c++11
+APP_CPPFLAGS += -std=c++11 -fexceptions -frtti
 
 APP_CPPFLAGS += -DANDROID -D__ANDROID__ -DUSE_UPNP
 ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
 APP_CPPFLAGS += -DANDROID_ARM7A
 endif
 
-# Forcing debug optimization. Use `ndk-build NDK_DEBUG=1` instead.
-#APP_OPTIM  := debug
-
 # git clone https://github.com/PurpleI2P/Boost-for-Android-Prebuilt.git
 # git clone https://github.com/PurpleI2P/OpenSSL-for-Android-Prebuilt.git
 # git clone https://github.com/PurpleI2P/MiniUPnP-for-Android-Prebuilt.git

android/src/org/purplei2p/i2pd/I2PD_JNI.java

@@ -17,7 +17,7 @@ public class I2PD_JNI {
 	public static native void onNetworkStateChanged(boolean isConnected);
 
 	public static void loadLibraries() {
-    	System.loadLibrary("gnustl_shared");
+    	System.loadLibrary("c++_shared");
         System.loadLibrary("i2pd");
     }
 }

libi2pd/util.h

@@ -9,21 +9,23 @@
 #include <boost/asio.hpp>
 
 #ifdef ANDROID
+#ifndef __clang__
 #include <boost/lexical_cast.hpp>
 namespace std
 {
-template <typename T>
-std::string to_string(T value)
-{
-	return boost::lexical_cast<std::string>(value);
-}
+	template <typename T>
+	std::string to_string(T value)
+	{
+		return boost::lexical_cast<std::string>(value);
+	}
 
-inline int stoi(const std::string& str)
-{
-	return boost::lexical_cast<int>(str);
-}
+	inline int stoi(const std::string& str)
+	{
+		return boost::lexical_cast<int>(str);
+	}
 }
 #endif
+#endif
 
 namespace i2p
 {