從網上可以找到一些ARM toolchain，但是由於Android系統使用的不是glibc而是Bionic libc。因此只能使用靜態編譯程式。

其實Android的NDK自帶了toolchain，但是不能直接使用NDK目錄內的toolchain，否則會出現找不到crtbegin_dynamic.o檔案。

即使用-L指定目錄或者直接放到gcc命令列也還是提示該檔案找不到。（參考最後附上的連結）。

其實Android NDK提供了指令碼來剝離出單獨的toolchain，指令碼的名字叫make-standalone-toolchain.sh

1. 下載Android NDK

http://developer.android.com/sdk/ndk/index.html

我用的是android-ndk-r6b

2. 提取toolchain

可以參考文件docs/STANDALONE-TOOLCHAIN.html

在linux系統中解壓NDK，假設解壓到/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.

有一些警告沒有關係，最終得到的是一個壓縮包 /tmp/ndk-hansel/arm-linux-androideabi-4.4.3.tar.bz2

注意：這個是我的Linux機器上的目錄。

3. 解壓單獨的toolchain

可以解壓到任意目錄，這裡假設為/opt/

4.寫個hello world 程式試試

hello.c

#include <stdlib.h>
#include <stdio.h>


int main(int argc, char* argv[])
{
  printf("Hello Andriod.\n");
  return 0;
}

export PATH:=/opt/android/arm-linux-androideabi-4.4.3/bin:${PATH}
CROSS_COMPILE=arm-linux-androideabi-
CC=$(CROSS_COMPILE)gcc
LD=$(CROSS_COMPILE)ld

PROG=hello
OBJS=hello.o

$(PROG):$(OBJS)
	$(CC) $(LDFLAGS) -o 
 
[email protected] $(OBJS) 

%.o:%.c
	$(CC) -c $(CFLAGS) $< -o [email protected]

clean:
	rm -rf *.o $(PROG)

   make

可以得到hello可執行檔案。

$ file hello
hello: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped

可見是動態連結的。

上傳到手機裡執行。如果用資料線連線了手機，而且安裝了Android SDK，可以使用adb命令。

adb push hello /system/sbin/hello

adb shell chmod 777 /system/sbin/hello
adb shell /system/sbin/hello

如果沒有SDK，可以在手機裡安裝一個QuickSSHd程式，通過WiFi用Putty之類的軟體連線到手機終端。通過SFTP來傳送檔案。

# ./hello
Hello Andriod.

注意： 手機需要有root許可權

參考：

http://groups.google.com/group/android-ndk/browse_thread/thread/7506768ccf52cea2?pli=1