(OK) 交叉编译hello.c for android (--sysroot)，不使用Android.mk和ndk-build

# export PATH=$PATH:/opt/android-on-linux/android-ndk-r8e/toolchains/arm-linux-androideabi-4.7/prebuilt/linux-x86_64/bin/

# arm-linux-androideabi-gcc --sysroot=/opt/android-on-linux/android-ndk-r8e/platforms/android-14/arch-arm/ hello.c -o hello

# adb push hello /data/

# adb shell

执行命令： 
chmod 700 /data/hello
/data/hello

+++++++++++++++++++++++++++++++++

# adb push hello /data/data/www/cgi-bin

宿主机浏览器：
http://192.168.0.101:8000/cgi-bin/hello

如果成功的话, 可以看到浏览器上 Hello world!
++++++++++++++++++++++++++++++++++++++++++++++++

[root@localhost 桌面]# gedit readdisk.c

    #include <stdio.h>
    #include <fcntl.h>

    int main()
    {
        unsigned char buf[512];
        int fd = open("/dev/blk/mmcblk1", O_RDWR);

        printf("文件描述符%d", fd);
        if (fd < 0) {        // printf("%d\n",errno);
            return 0;
        }
        int num;
        num = read(fd, buf, 512);
        printf("读取字数%d", num);
        printf("\n");
        int i, j;
        for (i = 0; i < 32; i++) {
            for (j = 0; j < 16; j++)
                printf("%02X ", buf[i * 16 + j]);
            printf("\n");
        }
        printf("\n");
        close(fd);
        return 0;
    }

[root@localhost 桌面]# arm-linux-androideabi-gcc --sysroot=/opt/android-on-linux/android-ndk-r8e/platforms/android-14/arch-arm/ readdisk.c -o readdisk

++++++++++++++++++++++++++++++++++++
root@kltexx:/data # ./readdisk                                                                                                        
error: only position independent executables (PIE) are supported.

[root@localhost 桌面]# arm-linux-androideabi-gcc --sysroot=/opt/android-on-linux/android-ndk-r8e/platforms/android-14/arch-arm/ -pie -fPIE readdisk.c -o readdisk