Problems with using gdb under linux-ubuntu14.04

Problems with using gdb under linux-ubuntu14.04

Problem:

(Gdb) list

No symbol table is read. Use the "file" command.

The reason is that there is no symbol table in the executable file. Why is there no symbol table? Because the symbol table is used in the compilation process, it will be unavailable after compilation, to add this information to an executable file, it must be specified during the compilation link.

Method:

Gcc-g filename-o filename

The-g option must be added here;

In addition, you can use print varname to view the variables in the program using gdb. You can use help to view other commands.