how to switch from assembly code to c code in gdb

Question

I am trying to debug my c program using

gcc -g -lm -lpthread -std=c99 -w terminalproject.c

and then

gdb a.out

but when I type layout next , it shows me assembly code not c code.

How to switch to C code in layout?

EDIT: I am using Red Hat Linux 6, I tried to run it in Ubuntu, It is showing C code.

ps my code has pthreads in it.

Answer 1

This command:

gcc -g -lm -lpthread -std=c99 -w terminalproject.c

is wrong . Use this instead:

gcc -g -std=c99 -pthread terminalproject.c -lm

You should never use -w (suppress all warnings) flag, unless you desire painful debugging sessions.

---

layout src says No source Available .

This likely means that you are using updated GCC, but ancient GDB. Try building recent GDB release from source -- it's usually not hard.