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变量

 nm命令
 

详细描述

变量说明

nm命令
1、示例代码
    #include <stdio.h>

    void myprint()
    {
        printf("hello world");
    }
    
    int main(int argc, char* argv[])
    {
        myprint();
        return 0;
    }
2、niuzibin@ubuntu:~/work/test1/nm$ nm main
3、nm -u main
    显示main 中的未定义符号,需要和其他对象文件进行链接,如下:
    niuzibin@ubuntu:~/work/test1/nm$ nm -u main
                 w __gmon_start__
                 w _ITM_deregisterTMCloneTable
                 w _ITM_registerTMCloneTable
                 w _Jv_RegisterClasses
                 U __libc_start_main@@GLIBC_2.2.5
                 U printf@@GLIBC_2.2.5
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