从网上可以找到一些ARM toolchain，但是由于Android系统使用的不是glibc而是Bionic libc。因此只能使用静态编译程序。
其实Android的NDK自带了toolchain，但是不能直接使用NDK目录内的toolchain，否则会出现找不到crtbegin_dynamic.o文件。
即使用-L指定目录或者直接放到gcc命令行也还是提示该文件找不到。（参考最后附上的链接）。
其实Android NDK提供了脚本来剥离出单独的toolchain，脚本的名字叫make-standalone-toolchain.sh
1. 下载Android NDK
我用的是android-ndk-r6b
2. 提取toolchain
可以参考文档docs/STANDALONE-TOOLCHAIN.html
在linux系统中解压NDK，假设解压到/opt;
cd /opt/android-ndk-r6b/
build/tools/make-standalone-toolchain.sh --platform=android-8
expr: warning: unportable BRE: `^\\([^\\-].*\\)$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^\\(--[^=]*\\)=.*$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^--[^=]*=\\(.*\\)$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
Auto-config: --toolchain=arm-linux-androideabi-4.4.3
Copying prebuilt binaries...
Copying sysroot headers and libraries...
Copying libstdc++ headers and libraries...
expr: warning: unportable BRE: `^\\([^\\-].*\\)$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^\\(--[^=]*\\)=.*$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^\\(--.*\\)$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^\\([^\\-].*\\)$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^\\([^\\-].*\\)$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^\\([^\\-].*\\)$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^\\(--[^=]*\\)=.*$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
expr: warning: unportable BRE: `^--[^=]*=\\(.*\\)$': using `^' as the first character
of the basic regular expression is not portable; it is being ignored
Creating package file: /tmp/ndk-hansel/arm-linux-androideabi-4.4.3.tar.bz2
Cleaning up...
Done.
有一些警告没有关系，最终得到的是一个压缩包 /tmp/ndk-hansel/arm-linux-androideabi-4.4.3.tar.bz2
注意：这个是我的Linux机器上的目录。