DEBUGGING STAGE

BUILD W/ DEBUGGING SYMBOLS

root@dev:~$ gcc -Wall -Wshadow -g -c programName.c -o objectFileOnly.o
root@dev:~$ ls
 programName.c  programName.o

 * the -g adds debugging information to the compiled output.
    - this enabled devs or sre to use a debugger like gdb to step through the
      code line-by-line
 * the -c compiles only and doesn't link.
    - it creates an object file (programName.o), NOT an executable yet.

32-BIT W/O OPTIMIZATION

 #OPTIMIZATION TURNED OFF
 root@dev:~$ gcc -Wall -Wshadow -g -m32 -O0 sourceFile.c outputFile.out

64-BIT W/O OPTIMIZATION

 #OPTIMIZATION TURNED OFF
 root@dev:~$ gcc -Wall -Wshadow -g -m64 -O0 sourceFile.c -o outputFile.out

DISPLAY COMMON WARNINGS AND ERRORS

root@dev:~$ gcc -Wall -Wshadow source.c -o output

 * this will display important warnings such as uninitialized variables, bad casts, etc.
    - it is a good habit to always use -Wall
       - the -Wall flag is actually two sets of options
          - -W (warnings)
          - all (all warnings)
          
root@dev:~$ gcc -Wshadow -Wall -Werror source.c -o output

 * the -Werror causes gcc to treat all warnings as errors
    - this option will result in NO C program successfully building when any warnings
      are present