Linux系统下编译VLC for Android

一、下载配置JDK
下载地址：https://www.oracle.com/technetwork/java/javase/downloads/index.html

操作步骤：
1、下载最新版本的Linux版jdk，将下载好的文件解压到/usr/android目录下

tar zxvf jdk-10.0.2_linux-x64_bin.tar.gz

2、设置环境变量
使用sudo vi /etc/profile命令编辑环境变量配置文件，在最底下添加：（安装目录修改为自己的）

export JAVA_HOME=/usr/android/jdk-10.0.2
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$ANDROID_NDK:$PATH
export CLASSPATH=$CLASSPATH:.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

3、设置完成后通过source /etc/profile命令重新加载环境变量
4、检查是否配置成功
输入java -version命令，显示以下内容，则说明安装配置成功：

java version "10.0.2" 2018-07-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.2+13)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.2+13, mixed mode)

二、下载配置NDK
下载地址：https://developer.android.google.cn/ndk/downloads/
操作步骤：
1、下载压缩包并解压到/usr/android/目录下

unzip android-ndk-r14b-linux-x86_64.zip

2、解压后使用sudo vi /etc/profile命令配置环境变量，在profile文件最后面添加以下命令（安装目录修改为自己的）

export ANDROID_NDK=/usr/android/android-ndk-r14b
export PATH=$PATH:$ANDROID_NDK

3、设置完成后通过source /etc/profile命令重新加载环境变量
二、下载配置SDK
下载地址：https://www.androiddevtools.cn/
操作步骤：
1、下载压缩包并解压到/usr/android/目录下；

tar zxvf android-sdk_r24.4.1-linux.tgz.tar

2、进入到android-sdk-linux/tools 目录下，使用./android update sdk -u命令下载更新全部可安装的SDK版本；
3、配置环境变量
在文件/etc/profile末端添加如下两行：

export ANDROID_SDK=/usr/android/android-sdk-linux
export PATH=$PATH:$ANDROID_SDK/tools:$ANDROID_SDK/platform-tools

4、设置完成后使用source /etc/profile命令重新加载环境变量使配置生效
四、安装Linux编译开发工具

sudo apt-get install autoconf automake ant autopoint cmake build-essential libtool m4 patch pkg-config protobuf-compiler ragel subversion unzip git

如果是64位ubuntu，为了防止后面少走弯路，需要安装32位的库。

sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install zlib1g:i386 libstdc++6:i386 libc6:i386

五、VLC编译
1、下载VLC 源码

git clone https://code.videolan.org/videolan/vlc-android.git

2、配置编译后运行的设备类型
打开/etc/profile。在最后添加：export ANDROID_ABI=armeabi-v7a，然后保存退出，执行 source /etc/profile 命令重新加载环境变量：

3、为了提高编译效率，可以在gradle.properties 文件中添加下列信息：

org.gradle.parallel=true
org.gradle.configureondemand=true
# If you have a BUNCH of RAM available
org.gradle.daemon=true
org.gradle.jvmargs=-Xmx2048M

4、进入到vlc-android目录，执行sh compile.sh -a armeabi-v7a命令开始编译。

六、问题汇总

问题1：gradle文件下载完成后，在下载vlc时候报错，默认git库太小不够用需要重新配置。

VLC source not found, cloning
Cloning into ‘vlc’…
remote: Counting objects: 553672, done.
remote: Compressing objects: 100% (107988/107988), done.
error: RPC failed; result=56, HTTP code = 2002 MiB | 304.00 KiB/s
fatal: The remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed

解决方法：通过git config --global http.postBuffer 524288000命令修改git的传输字节限制。

问题2：bootstrap failed

autoreconf: automake failed with exit status: 1
vlc: bootstrap failed

解决方法：多执行几次sh compile.sh -a armeabi-v7a就可以了。

问题3：缺少一个工具libtool

autoreconf: configure.in: tracing
autoreconf: configure.in: not using Libtool
autoreconf: running: /home/android/vlc-android/vlc/extras/tools/build/bin/autoconf --include=/home/android/vlc-android/vlc/contrib/arm-linux-androideabi/share/aclocal --force
configure.in:74: error: possibly undefined macro: AC_DISABLE_SHARED
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.in:75: error: possibly undefined macro: AC_LIBTOOL_WIN32_DLL
configure.in:76: error: possibly undefined macro: AC_PROG_LIBTOOL
autoreconf: /home/android/vlc-android/vlc/extras/tools/build/bin/autoconf failed with exit status: 1
make: *** [.a52] Error 1
contribs: make failed

解决方法：通过sudo apt-get autoremove libtool命令移除手动安装的libtool，再执行sh compile.sh -a armeabi-v7a会自动下载libtool。

问题4：gettext的版本号不对

androideabi/share/aclocal
autoreconf: Entering directory `.’
autoreconf: running: autopoint --force
autopoint: *** The AM_GNU_GETTEXT_VERSION declaration in your configure.ac
file requires the infrastructure from gettext-0.19.3 but this version
is older. Please upgrade to gettext-0.19.3 or newer.
autopoint: *** Stop.
autoreconf: autopoint failed with exit status: 1
make: *** [.gpg-error] Error 1
contribs: make failed

解决方法：

通过gettext --version命令查看gettext版本号，显示如下：

gettext (GNU gettext-runtime) 0.18.3
Copyright (C) 1995-1997, 2000-2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Ulrich Drepper.

通过grep --include=configure.ac -rn AM_GNU_GETTEXT_VERSION .命令查看哪些文件涉及版本号，显示如下：

./vlc/configure.ac:493:AM_GNU_GETTEXT_VERSION([0.19.8])
./vlc/contrib/contrib-android-arm-linux-androideabi/gnutls/configure.ac:256:AM_GNU_GETTEXT_VERSION([0.19])
./vlc/contrib/contrib-android-arm-linux-androideabi/libgpg-error/configure.ac:154:AM_GNU_GETTEXT_VERSION([0.18.3])

修改以上文件中AM_GNU_GETTEXT_VERSION为自己的版本号0.18.3。

问题5：安装的libtool存在问题

…/configure: line 9945: syntax error near unexpected token dlopen' ../configure: line 9945:LT_INIT(dlopen win32-dll shared disable-static)’
vlc: configure failed

解决方法：进入vlc-android/vlc目录下执行autoreconf命令。

问题6：库路径寻找错误

Android NDK: WARNING:private_libs/Android.mk:anw.10: non-system libraries in linker flags: -lhardware
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
Android NDK: WARNING:private_libs/Android.mk:anw.13: non-system libraries in linker flags: -lhardware
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
Android NDK: WARNING:private_libs/Android.mk:anw.14: non-system libraries in linker flags: -lhardware
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
Android NDK: WARNING:private_libs/Android.mk:anw.18: non-system libraries in linker flags: -lhardware
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
Android NDK: WARNING:private_libs/Android.mk:anw.21: non-system libraries in linker flags: -lhardware
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
Android NDK: WARNING:private_libs/Android.mk:iomx.10: non-system libraries in linker flags: -lgcc -lstagefright -lmedia -lutils -lbinder -lcutils -lui
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
Android NDK: WARNING:private_libs/Android.mk:iomx.13: non-system libraries in linker flags: -lgcc -lstagefright -lmedia -lutils -lbinder -lcutils -lui
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
Android NDK: WARNING:private_libs/Android.mk:iomx.14: non-system libraries in linker flags: -lgcc -lstagefright -lmedia -lutils -lbinder -lcutils -lui
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module

解决办法：修改libvlc/private_libs/Android.mk，添加以下部分：

LOCAL_LDLIBS     := -L$(ANDROID_PRIVATE_LIBDIR)/$(TARGET_TUPLE) 
LOCAL_SHARED_LIBRARIES := -lgcc -lstagefright -lmedia -lutils -lbinder -llog -lcutils -lui

LOCAL_LDLIBS     := -L$(ANDROID_PRIVATE_LIBDIR)/$(TARGET_TUPLE) 
LOCAL_SHARED_LIBRARIES := -llog -lhardware

Linux系统下编译VLC for Android

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