查看so文件是32位还是64位

[root@n1 native]# file libhadoop.so.1.0.0

libhadoop.so.1.0.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, not stripped

nm用来列出目标文件的符号清单.

ar命令可以用来创建、修改库，也可以从库中提出单个模块。

readelf -d libffmpeg.so | grep NEEDED

 objdump -V libhadoop.so.1.0.0

显示：

GNU objdump version 2.20.51.0.2-5.36.el6 20100205 Copyright 2009 Free Software Foundation, Inc. This program is free software; you may redistribute it under the terms of the GNU General Public License version 3 or (at your option) any later version. This program has absolutely no warranty.

 ldd libhadoop.so.1.0.0

显示： linux-vdso.so.1 =>  (0x00007fffbf3d6000)

        libdl.so.2 =>/lib64/libdl.so.2 (0x00007fab46569000)         libjvm.so => not found         libc.so.6 => /lib64/libc.so.6 (0x00007fab461d4000)         /lib64/ld-linux-x86-64.so.2 (0x00007fab46990000)