Update android build dependencies

Update android build dependencies.  Use android NDK r20 and build
aarch64 binary.

Author: tatsuhiro-t

README.android

@@ -42,11 +42,11 @@ aria2c executable was generated using android-ndk-r14b.
 
 The following libraries were statically linked.
 
-* openssl 1.0.2o
-* expat 2.2.5
+* openssl 1.1.1c
+* expat 2.2.7
 * zlib 1.2.11
-* c-ares 1.14.0
-* libssh2 1.8.0
+* c-ares 1.15.0
+* libssh2 1.9.0
 
 Since Android does not have ``/etc/resolv.conf``, c-ares (asynchronous
 DNS resolver) is disabled by default. But name resolution is sometimes

README.rst

@@ -359,7 +359,7 @@ Cross-compiling Android binary
 In this section, we describe how to build Android binary using Android
 NDK cross-compiler on Debian Linux.
 
-At the time of this writing, android-ndk-r14b should compile aria2
+At the time of this writing, Android NDK r20 should compile aria2
 without errors.
 
 ``android-config`` script is a configure script wrapper for Android
@@ -376,33 +376,17 @@ When building the above libraries, make sure that disable shared
 library and enable only static library. We are going to link those
 libraries statically.
 
-We use zlib which comes with Android NDK, so we don't have to build it
-by ourselves.
+``android-config`` assumes that ``$ANDROID_HOME`` and ``$NDK``
+environment variables are defined.
 
-``android-config`` assumes the existence of ``$ANDROID_HOME``
-environment variable which must fulfill the following conditions:
+We currently use Android NDK r20.  ``$NDK`` should point to the
+directory to Anroid NDK.  The build tools will be found under
+``$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/``.
 
-* Android NDK toolchain is installed under
-  ``$ANDROID_HOME/toolchain``.  Refer to `Standalone Toolchain
-  <https://developer.android.com/ndk/guides/standalone_toolchain.html>`_
-  for more details, but it is a bit out of date.
+All the dependent libraries must be installed under
+``$ANDROID_HOME/usr/local``.
 
-  To install toolchain under ``$ANDROID_HOME/toolchain``, do this:
-
-  .. code-block:: text
-
-     $NDK/build/tools/make_standalone_toolchain.py \
-        --arch arm --api 16 --stl=gnustl \
-        --install-dir $ANDROID_HOME/toolchain
-
-* The dependent libraries must be installed under
-  ``$ANDROID_HOME/usr/local``.
-
-Before running ``android-config`` and ``android-make``,
-``$ANDROID_HOME`` environment variable must be set to point to the
-correct path.
-
-After ``android-config``, run ``android-make`` to compile sources.
+After ``android-config``, run ``make`` to compile sources.
 
 Building documentation
 ----------------------

android-config

@@ -35,12 +35,15 @@ if [ -z "$ANDROID_HOME" ]; then
     echo 'No $ANDROID_HOME specified.'
     exit 1
 fi
+if [ -z "$NDK" ]; then
+    echo 'No $NDK specified.'
+    exit 1
+fi
 PREFIX=$ANDROID_HOME/usr/local
-TOOLCHAIN=$ANDROID_HOME/toolchain
-PATH=$TOOLCHAIN/bin:$PATH
+TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/linux-x86_64
 
 ./configure \
-    --host=arm-linux-androideabi \
+    --host=aarch64-linux-android \
     --build=`dpkg-architecture -qDEB_BUILD_GNU_TYPE` \
     --disable-nls \
     --without-gnutls \
@@ -51,10 +54,15 @@ PATH=$TOOLCHAIN/bin:$PATH
     --with-libcares \
     --with-libz \
     --with-libssh2 \
-    CC="$TOOLCHAIN"/bin/arm-linux-androideabi-clang \
-    CXX="$TOOLCHAIN"/bin/arm-linux-androideabi-clang++ \
+    AR=$TOOLCHAIN/bin/aarch64-linux-android-ar \
+    AS=$TOOLCHAIN/bin/aarch64-linux-android-as \
+    CC=$TOOLCHAIN/bin/aarch64-linux-android29-clang \
+    CXX=$TOOLCHAIN/bin/aarch64-linux-android29-clang++ \
+    LD=$TOOLCHAIN/bin/aarch64-linux-android-ld \
+    RANLIB=$TOOLCHAIN/bin/aarch64-linux-android-ranlib \
+    STRIP=$TOOLCHAIN/bin/aarch64-linux-android-strip \
     CXXFLAGS="-Os -g" \
     CFLAGS="-Os -g" \
     CPPFLAGS="-fPIE" \
-    LDFLAGS="-fPIE -pie -L$PREFIX/lib" \
+    LDFLAGS="-fPIE -pie -L$PREFIX/lib -static-libstdc++" \
     PKG_CONFIG_LIBDIR="$PREFIX/lib/pkgconfig"

android-make

@@ -31,11 +31,12 @@
 # version.  If you delete this exception statement from all source
 # files in the program, then also delete it here.
 
-if [ -z "$ANDROID_HOME" ]; then
-    echo 'No $ANDROID_HOME specified.'
+if [ -z "$NDK" ]; then
+    echo 'No $NDK specified.'
     exit 1
 fi
-TOOLCHAIN=$ANDROID_HOME/toolchain
+
+TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/linux-x86_64
 PATH=$TOOLCHAIN/bin:$PATH
 
 # cd to the directory where this script exists.
@@ -49,8 +50,8 @@ if [ -z "$VERSION" ]; then
     exit 1
 fi
 
-DIST_DIR=aria2-$VERSION-android-arm-build1
-arm-linux-androideabi-strip src/aria2c
+DIST_DIR=aria2-$VERSION-aarch64-linux-android-build1
+aarch64-linux-android-strip src/aria2c
 mkdir $DIST_DIR
 cp AUTHORS COPYING ChangeLog LICENSE.OpenSSL NEWS README.html README.android \
     src/aria2c $DIST_DIR

android-release

@@ -4,6 +4,10 @@ if [ -z "$ANDROID_HOME" ]; then
     echo 'No $ANDROID_HOME specified.'
     exit 1
 fi
+if [ -z "$NDK" ]; then
+    echo 'No $NDK specified.'
+    exit 1
+fi
 
 VERSION=$1
 PREV_VERSION=$2

makerelease

@@ -147,7 +147,7 @@
 // # define a2fseek(fp, offset, origin): No fseek64 and not used in aria2
 #  define a2fstat(fd, buf) fstat64(fd, buf)
 // # define a2ftell(fd): No ftell64 and not used in aria2
-#  define a2_struct_stat struct stat
+#  define a2_struct_stat struct stat64
 #  define a2stat(path, buf) stat64(path, buf)
 #  define a2mkdir(path, openMode) mkdir(path, openMode)
 #  define a2utimbuf utimbuf