gcc -g option flag
gcc -g generates debug information to be used by GDB debugger.
| option | description |
|---|---|
| -g0 | no debug information |
| -g1 | minimal debug information |
| -g | default debug information |
| -g3 | maximal debug information |
Syntax
$ gcc -glevel [options] [source files] [object files] [-o output file]
Example
Write source file myfile.c:
// myfile.c
#include <stdio.h>
void main()
{
printf("Program run!!\n");
}
Build myfile.c on terminal and run gdb to debug:
$ gcc -g myfile.c -o myfile
$ gdb myfile
(gdb) run
Starting program: /home/ubuntu/myfile
Program run!!
Program exited with code 012.
(gdb) quit
$