(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：


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