unapue相关

查看程序依赖库：
[yangpeng@yangpeng backtr]>ldd a.out
        linux-vdso.so.1 =>  (0x00007ffff02fb000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f6d0a7a4000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f6d0ab6e000)

How a C program is started and how it terminates