No source file named getopt.c.

[Eli Zaretskii]

> Date: Fri, 20 Mar 2015 14:09:00 +0800
> From: Fei Ding <fdingiit@gmail.com>
> 
> I want to set a break point on some code in getopt.c, but I just got:
> 
> ////////////////////////////////////////////
> (gdb) b getopt.c:100
> No source file named getopt.c.
> ////////////////////////////////////////////
> 
> then, I did this to add the source directory of that code, as:
> 
> ////////////////////////////////////////////
> (gdb) directory /home/dingaaa/test/gdb-7.6/libiberty/
> Source directories searched: /home/dingaaa/test/gdb-7.6/libiberty:$cdir:$cwd
> ////////////////////////////////////////////
> 
> but still, I get
> ////////////////////////////////////////////
> (gdb) b getopt.c:100
> No source file named getopt.c.
> ////////////////////////////////////////////
> 
> BTW: I've changed Makefiles, with `-g -O0`
> 
> What's the problem?

You can only do this when debugging a program that has getopt.c
compiled in.  Since you give no details on how you built that program,
it's hard to say something more intelligent.