Gcc -g Option Flag (debug)

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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 $

See also

  • gcc
  • gcc -c
  • gcc -D
  • gcc -I
  • gcc -L -l
  • gcc -o
  • gcc -O
  • gcc -Wall

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