diff --git a/deps/boost/build-boost b/deps/boost/build-boost
index ea7e06c3..fcd10e56 100755
--- a/deps/boost/build-boost
+++ b/deps/boost/build-boost
@@ -29,6 +29,9 @@ if [ "$NO_WIPE" != "1" ]; then
     #patch -p1 <$DL/asio-engine.patch
     #patch -p0 <$O3/core/deps/boost/atomic-1.55.0.patch
     patch -p1 <$O3/core/deps/boost/intrusive_ptr.patch
+    patch -p1 <$O3/core/deps/boost/page_size.patch
+
+    ./bootstrap.sh
 
     for T in $TARGETS ; do
 	TS="${T//-/}"
@@ -43,7 +46,6 @@ EOF
     echo '********** BOOST CONFIG'
     tail -30 $BCONF/user-config.jam
     echo '********** END BOOST CONFIG'
-    ./bootstrap.sh
 else
     echo RETAIN existing source
     cd $BOOST_VERSION
diff --git a/deps/boost/page_size.patch b/deps/boost/page_size.patch
new file mode 100644
index 00000000..077015fd
--- /dev/null
+++ b/deps/boost/page_size.patch
@@ -0,0 +1,16 @@
+diff -ur boost_1_57_0/boost/thread/pthread/thread_data.hpp boost_1_57_0.new/boost/thread/pthread/thread_data.hpp
+--- boost_1_57_0/boost/thread/pthread/thread_data.hpp	2014-10-24 10:43:26.000000000 -0600
++++ boost_1_57_0.new/boost/thread/pthread/thread_data.hpp	2015-02-26 00:43:26.000000000 -0700
+@@ -24,8 +24,10 @@
+ #include <vector>
+ #include <utility>
+ 
+-#if defined(__ANDROID__)
+-#include <asm/page.h> // http://code.google.com/p/android/issues/detail?id=39983
++// JY modified
++#if defined(__ANDROID__) && !defined(PAGE_SIZE)
++#define PAGE_SIZE 4096
++//#include <asm/page.h> // http://code.google.com/p/android/issues/detail?id=39983
+ #endif
+ 
+ #include <pthread.h>
diff --git a/javacli/build-android b/javacli/build-android
index 84a96e59..1d75bf98 100755
--- a/javacli/build-android
+++ b/javacli/build-android
@@ -31,7 +31,7 @@ fi
 echo SWIG
 swig -c++ -java -package $pkg -I$O3/core/client -I$O3/core ovpncli.i
 
-for TARGET in android android-a7a ; do
+for TARGET in android-a8a android-a7a android ; do
 
 if [ "$DEBUG_BUILD" = "1" ]; then
     . ../vars/vars-${TARGET}-dbg
diff --git a/scripts/android/build-all b/scripts/android/build-all
index 8f160717..715b4a3e 100755
--- a/scripts/android/build-all
+++ b/scripts/android/build-all
@@ -9,15 +9,16 @@ cd $DEP_DIR
 rm -rf boost* lz4* lzo* minicrypto openssl* polarssl* snappy*
 echo "******* BOOST"
 $O3/core/scripts/android/build-boost
-#echo "******* MINICRYPTO"
-#$O3/core/scripts/android/build-minicrypto
 echo "******* POLARSSL"
 $O3/core/scripts/android/build-polarssl
+echo "******* LZ4"
+$O3/core/scripts/android/build-lz4
+echo "******* SNAPPY"
+$O3/core/scripts/android/build-snappy
+
+#echo "******* MINICRYPTO"
+#$O3/core/scripts/android/build-minicrypto
 #echo "******* OpenSSL"
 #$O3/core/scripts/android/build-openssl-small
 #echo "******* LZO"
 #$O3/core/scripts/android/build-lzo
-echo "******* SNAPPY"
-$O3/core/scripts/android/build-snappy
-echo "******* LZ4"
-$O3/core/scripts/android/build-lz4
diff --git a/scripts/android/build-boost b/scripts/android/build-boost
index aa565bbf..eaa89e43 100755
--- a/scripts/android/build-boost
+++ b/scripts/android/build-boost
@@ -17,7 +17,7 @@ cd $DEP_DIR
 rm -rf boost
 mkdir boost
 export LINK_MODE=static
-export TARGETS="android android-dbg android-a7a android-a7a-dbg"
+export TARGETS="android-a8a android-a8a-dbg android-a7a android-a7a-dbg android android-dbg"
 export SDK_PATH_SCRIPT=$O3/core/vars/android-sdk-path
 $O3/core/deps/boost/build-boost
 exit 0
diff --git a/scripts/android/build-lz4 b/scripts/android/build-lz4
index 2d1ba00c..a14c8627 100755
--- a/scripts/android/build-lz4
+++ b/scripts/android/build-lz4
@@ -15,7 +15,7 @@ cd $DEP_DIR
 rm -rf lz4
 mkdir lz4
 
-for target in android android-dbg android-a7a android-a7a-dbg ; do
+for target in android-a8a android-a8a-dbg android-a7a android-a7a-dbg android android-dbg ; do
     echo '***************' TARGET $target
     TARGET=$target $O3/core/deps/lz4/build-lz4
 done
diff --git a/scripts/android/build-lzo b/scripts/android/build-lzo
index 68f739c9..7fedc435 100755
--- a/scripts/android/build-lzo
+++ b/scripts/android/build-lzo
@@ -15,7 +15,7 @@ cd $DEP_DIR
 rm -rf lzo
 mkdir lzo
 
-for target in android android-dbg android-a7a android-a7a-dbg ; do
+for target in android-a8a android-a8a-dbg android-a7a android-a7a-dbg android android-dbg ; do
     echo '***************' TARGET $target
     TARGET=$target $O3/core/deps/lzo/build-lzo
 done
diff --git a/scripts/android/build-openssl-small b/scripts/android/build-openssl-small
index a9091d54..5fdbcce3 100755
--- a/scripts/android/build-openssl-small
+++ b/scripts/android/build-openssl-small
@@ -13,7 +13,7 @@ cd $DEP_DIR
 [ -z "$DL" ] && DL=~/Downloads
 rm -rf openssl
 mkdir openssl
-for TARGET in android android-dbg android-a7a android-a7a-dbg ; do
+for TARGET in android-a8a android-a8a-dbg android-a7a android-a7a-dbg android-dbg android ; do
     . $O3/core/vars/vars-$TARGET
     export OPENSSL=$OPENSSL_VERSION
     export DIST=$(pwd)/openssl-$PLATFORM
diff --git a/scripts/android/build-polarssl b/scripts/android/build-polarssl
index 10e24552..e04e51c3 100755
--- a/scripts/android/build-polarssl
+++ b/scripts/android/build-polarssl
@@ -18,7 +18,7 @@ mini=0
 rm -rf polarssl
 mkdir polarssl
 
-for target in android-dbg android android-a7a android-a7a-dbg ; do
+for target in android-a8a android-a8a-dbg android-a7a android-a7a-dbg android android-dbg ; do
     echo '***************' TARGET $target
     VERBOSE=1 TARGET=$target CMAKE_TARGET=android USE_MINICRYPTO=$mini MINICRYPTO_DIR=$(pwd)/minicrypto/minicrypto-$target $O3/core/deps/polarssl/build-polarssl
     mv polarssl-$target polarssl/
diff --git a/scripts/android/build-snappy b/scripts/android/build-snappy
index fd0232ff..a94e4392 100755
--- a/scripts/android/build-snappy
+++ b/scripts/android/build-snappy
@@ -15,7 +15,7 @@ cd $DEP_DIR
 rm -rf snappy
 mkdir snappy
 
-for target in android android-dbg android-a7a android-a7a-dbg ; do
+for target in android-a8a android-a8a-dbg android-a7a android-a7a-dbg android android-dbg ; do
     echo '***************' TARGET $target
     TARGET=$target $O3/core/deps/snappy/build-snappy
 done
diff --git a/scripts/android/build-toolchain b/scripts/android/build-toolchain
index 56267ca9..fcc8332c 100755
--- a/scripts/android/build-toolchain
+++ b/scripts/android/build-toolchain
@@ -5,19 +5,39 @@ if [ -z "$O3" ]; then
     echo O3 var must point to ovpn3 tree ; exit 1
 fi
 export DEP_DIR=${DEP_DIR:-$HOME/src/android}
-cd $DEP_DIR
 export NO_MOD_PATH=1
 . $O3/core/vars/android-sdk-path
-DEST=$(pwd)/tc
+
+# 64 bit
+cd $DEP_DIR
+DEST=$(pwd)/tc-arm64
 rm -rf $DEST
+ABI=aarch64-linux-android
 $NDK/build/tools/make-standalone-toolchain.sh \
     --verbose \
     --ndk-dir=$NDK \
-    --toolchain=arm-linux-androideabi-4.8 \
+    --toolchain=$ABI-4.9 \
+    --stl=gnustl \
+    --arch=arm64 \
+    --platform=android-21 \
+    --install-dir=$DEST
+cd $DEST/$ABI/bin
+ln -s ../../bin/$ABI-gcc cc
+ln -s ../../bin/$ABI-gcc gcc
+ln -s ../../bin/$ABI-g++ g++
+
+# 32 bit
+cd $DEP_DIR
+DEST=$(pwd)/tc-arm
+rm -rf $DEST
+ABI=arm-linux-androideabi
+$NDK/build/tools/make-standalone-toolchain.sh \
+    --verbose \
+    --ndk-dir=$NDK \
+    --toolchain=$ABI-4.8 \
     --stl=gnustl \
     --arch=arm \
     --platform=android-14 \
     --install-dir=$DEST
-cd $DEST/arm-linux-androideabi/bin
-ln -s ../../bin/arm-linux-androideabi-gcc cc
-exit 0
+cd $DEST/$ABI/bin
+ln -s ../../bin/$ABI-gcc cc
diff --git a/vars/android-sdk-path b/vars/android-sdk-path
index e98e9b22..dc3ec5b4 100644
--- a/vars/android-sdk-path
+++ b/vars/android-sdk-path
@@ -1,5 +1,7 @@
 # setup PATH for Android SDK and NDK
 AD=$HOME/src/android
-export SDK=$AD/adt-bundle-mac-x86_64-20131030/sdk
-export NDK=$AD/android-ndk-r9c
-[ "$NO_MOD_PATH" != "1" ] && export PATH="$SDK/tools:$SDK/platform-tools:$AD/tc/bin:$AD/tc/arm-linux-androideabi/bin:$PATH"
+export SDK=$AD/android-sdk-macosx
+export NDK=$AD/android-ndk-r10d
+if [ "$NO_MOD_PATH" != "1" ]; then
+   export PATH="$SDK/tools:$SDK/platform-tools:$PATH"
+fi
diff --git a/vars/vars-android b/vars/vars-android
index 40d44a1a..db7cb3ff 100644
--- a/vars/vars-android
+++ b/vars/vars-android
@@ -6,4 +6,8 @@ export OTHER_COMPILER_FLAGS=""
 export CXX_COMPILER_FLAGS="-std=c++11"
 export LIB_OPT_LEVEL="-O3"
 export LIB_FPIC="-fPIC"
-export PLATFORM_FLAGS="--sysroot=$DEP_DIR/tc/sysroot"
+export TC=$DEP_DIR/tc-arm
+export PLATFORM_FLAGS="--sysroot=$TC/sysroot"
+
+[ -z "$VARS_SAVE_PATH" ] && VARS_SAVE_PATH="$PATH"
+export PATH="$TC/bin:$TC/arm-linux-androideabi/bin:$VARS_SAVE_PATH"
diff --git a/vars/vars-android-a7a b/vars/vars-android-a7a
index f12c6f25..684084fe 100644
--- a/vars/vars-android-a7a
+++ b/vars/vars-android-a7a
@@ -6,4 +6,8 @@ export OTHER_COMPILER_FLAGS=""
 export CXX_COMPILER_FLAGS="-std=c++11"
 export LIB_OPT_LEVEL="-O3"
 export LIB_FPIC="-fPIC"
-export PLATFORM_FLAGS="-march=armv7-a -mthumb -fomit-frame-pointer --sysroot=$DEP_DIR/tc/sysroot"
+export TC=$DEP_DIR/tc-arm
+export PLATFORM_FLAGS="-march=armv7-a -mthumb -fomit-frame-pointer --sysroot=$TC/sysroot"
+
+[ -z "$VARS_SAVE_PATH" ] && VARS_SAVE_PATH="$PATH"
+export PATH="$TC/bin:$TC/arm-linux-androideabi/bin:$VARS_SAVE_PATH"
diff --git a/vars/vars-android-a7a-dbg b/vars/vars-android-a7a-dbg
index 0da2fd33..6fb757cb 100644
--- a/vars/vars-android-a7a-dbg
+++ b/vars/vars-android-a7a-dbg
@@ -6,4 +6,8 @@ export OTHER_COMPILER_FLAGS="-g"
 export CXX_COMPILER_FLAGS="-std=c++11"
 export LIB_OPT_LEVEL="-O0"
 export LIB_FPIC="-fPIC"
-export PLATFORM_FLAGS="-march=armv7-a -mthumb -fomit-frame-pointer --sysroot=$DEP_DIR/tc/sysroot"
+export TC=$DEP_DIR/tc-arm
+export PLATFORM_FLAGS="-march=armv7-a -mthumb -fomit-frame-pointer --sysroot=$TC/sysroot"
+
+[ -z "$VARS_SAVE_PATH" ] && VARS_SAVE_PATH="$PATH"
+export PATH="$TC/bin:$TC/arm-linux-androideabi/bin:$VARS_SAVE_PATH"
diff --git a/vars/vars-android-a8a b/vars/vars-android-a8a
new file mode 100644
index 00000000..460f5e7b
--- /dev/null
+++ b/vars/vars-android-a8a
@@ -0,0 +1,13 @@
+export DEP_DIR=$HOME/src/android
+export PLATFORM=android-a8a
+export ABI=arm64-v8a
+export DEBUG_BUILD=0
+export OTHER_COMPILER_FLAGS=""
+export CXX_COMPILER_FLAGS="-std=c++11"
+export LIB_OPT_LEVEL="-O3"
+export LIB_FPIC="-fPIC"
+export TC=$DEP_DIR/tc-arm64
+export PLATFORM_FLAGS="-march=armv8-a -fomit-frame-pointer --sysroot=$TC/sysroot"
+
+[ -z "$VARS_SAVE_PATH" ] && VARS_SAVE_PATH="$PATH"
+export PATH="$TC/bin:$TC/aarch64-linux-android/bin:$VARS_SAVE_PATH"
diff --git a/vars/vars-android-a8a-dbg b/vars/vars-android-a8a-dbg
new file mode 100644
index 00000000..46742148
--- /dev/null
+++ b/vars/vars-android-a8a-dbg
@@ -0,0 +1,13 @@
+export DEP_DIR=$HOME/src/android
+export PLATFORM=android-a8a-dbg
+export ABI=arm64-v8a
+export DEBUG_BUILD=1
+export OTHER_COMPILER_FLAGS="-g"
+export CXX_COMPILER_FLAGS="-std=c++11"
+export LIB_OPT_LEVEL="-O0"
+export LIB_FPIC="-fPIC"
+export TC=$DEP_DIR/tc-arm64
+export PLATFORM_FLAGS="-march=armv8-a -fomit-frame-pointer --sysroot=$TC/sysroot"
+
+[ -z "$VARS_SAVE_PATH" ] && VARS_SAVE_PATH="$PATH"
+export PATH="$TC/bin:$TC/aarch64-linux-android/bin:$VARS_SAVE_PATH"
diff --git a/vars/vars-android-dbg b/vars/vars-android-dbg
index 2a2d6839..84b43798 100644
--- a/vars/vars-android-dbg
+++ b/vars/vars-android-dbg
@@ -6,4 +6,8 @@ export OTHER_COMPILER_FLAGS="-g"
 export CXX_COMPILER_FLAGS="-std=c++11"
 export LIB_OPT_LEVEL="-O0"
 export LIB_FPIC="-fPIC"
-export PLATFORM_FLAGS="--sysroot=$DEP_DIR/tc/sysroot"
+export TC=$DEP_DIR/tc-arm
+export PLATFORM_FLAGS="--sysroot=$TC/sysroot"
+
+[ -z "$VARS_SAVE_PATH" ] && VARS_SAVE_PATH="$PATH"
+export PATH="$TC/bin:$TC/arm-linux-androideabi/bin:$VARS_SAVE_PATH"