Enable crosscompiled android arm7 version of openvpn

Author: tadovas

openvpn3/bridge/libopenvpn3_android_armeabi-v7a.a

@@ -31,6 +31,7 @@ package openvpn3
 #cgo android,arm64 LDFLAGS: -lopenvpn3_android_arm64
 #cgo android,amd64 LDFLAGS: -lopenvpn3_android_amd64
 #cgo android,386 LDFLAGS: -lopenvpn3_android_x86
+#cgo android,arm LDFLAGS: -lopenvpn3_android_armeabi-v7a
 //TODO copied from openvpnv3 lib build tool - do we really need all of this?
 #cgo darwin,amd64 LDFLAGS: -framework Security -framework CoreFoundation -framework SystemConfiguration -framework IOKit -framework ApplicationServices -mmacosx-version-min=10.8 -stdlib=libc++
 //iOS frameworks

openvpn3/session.go

@@ -24,6 +24,7 @@ echo "O3 is: $O3"
 /go-src-root/scripts/x-compile-windows.sh
 /go-src-root/scripts/x-compile-ios.sh
 /go-src-root/scripts/x-compile-android-arm64.sh
+/go-src-root/scripts/x-compile-android-armeabi-v7a.sh
 /go-src-root/scripts/x-compile-android-x86.sh
 /go-src-root/scripts/x-compile-android-amd64.sh
 

scripts/build-bridge.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -e
+
+PLATFORM=android
+SCRIPTS=android
+LIBSUFFIX=android_armeabi-v7a
+
+echo "Building for: $PLATFORM"
+
+echo "Bootstrapping Android NDK"
+
+$ANDROID_NDK_ROOT/build/tools/make_standalone_toolchain.py --install-dir=/usr/$ANDROID_CHAIN_ARM --api=16 --arch=arm
+
+
+echo BUILD DEPS
+pushd $DEP_DIR
+rm -rf asio* lz4* mbedtls* #lzo* boost* minicrypto openssl* polarssl* snappy*
+echo "******* ASIO"
+$O3/core/deps/asio/build-asio
+echo "******* MBEDTLS"
+TARGETS=android-a7a $O3/core/scripts/android/build-mbedtls
+echo "******* LZ4"
+TARGETS=android-a7a $O3/core/scripts/android/build-lz4
+popd
+
+. core/vars/setpath
+. core/vars/vars-android-a7a
+
+cd core/adapter
+PROF=$PLATFORM MTLS=1 NOSSL=1 LZ4=1 ASIO=1 ECHO=1 CO=1 build library
+
+LIB_OUT="/go-src-root/openvpn3/bridge/libopenvpn3_${LIBSUFFIX}.a"
+rm -rf $LIB_OUT
+
+libs=("$DEP_DIR/mbedtls/mbedtls-$PLATFORM/library/libmbedtls.a" \
+"$DEP_DIR/lz4/lz4-$PLATFORM/lib/liblz4.a" )
+
+MORE_LIBS=${libs[@]} /go-src-root/scripts/concat-libs.sh $LIB_OUT library.o
+
+$RANLIB_CMD $LIB_OUT | grep -v "has no symbols" || true