最好是阅读 man nm

成都网站建设哪家好，找创新互联！专注于网页设计、成都网站建设、微信开发、微信小程序、集团成都定制网页设计等服务项目。核心团队均拥有互联网行业多年经验，服务众多知名企业客户；涵盖的客户类型包括：成都展览展示等众多领域，积累了大量丰富的经验，同时也获得了客户的一致夸奖！

nm - list symbols from object files

If lowercase, the symbol is local; if uppercase, the symbol is global (external)

其输出结果：

 "A" The symbol’s value is absolute, and will not be changed by further linking.

 "B"/"b" The symbol is in the uninitialized data section (known as BSS).

  "C" The symbol is common.  Common symbols are uninitialized data.  When linking, multiple common symbols may appear with the same name.  If the symbol is defined anywhere, the common symbols are treated as undefined references.

"D"/"d" The symbol is in the initialized data section.

 "T"/"t" The symbol is in the text (code) section.

"U" The symbol is undefined.

"u" The symbol is a unique global symbol.  This is a GNU extension to the standard set of ELF symbol bindings.  For such a symbol the dynamic linker will make sure that in the entire process there is just one symbol with this name and type in use.

"S"/"s" The symbol is in an uninitialized data section for small objects.

A	Global absolute 符号。
a	Local absolute 符号。
B	Global bss 符号。
b	Local bss 符号。
D	Global data 符号。
d	Local data 符号。
f	源文件名称符号。
T	Global text 符号。
t	Local text 符号。
U	未定义符号。

另外有需要云服务器可以了解下创新互联scvps.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。

网站题目：nm命令-创新互联
文章位置：http://myzitong.com/article/dgeepg.html