How to compile in GCC

GNU and GCC compiler

The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Ada, Go, and D, as well as libraries for these languages (libstdc++,…). GCC was originally written as the compiler for the GNU operating system. The GNU system was developed to be 100% free software, free in the sense that it respects the user’s freedom.

Creating our program in C

#include <stdio.h>
int main(void)
{
char text[100] = "Hello World";
printf("%s", text);
return (0);
}

First we will compile our program

gcc hello_world.c -o hello_world.o

Then we will have to give execution permissions to our final file:

chmod u+x hello_world.o

Finally we execute our output file:

./hello_world.o

Assuming that main.c exists and contains code, what will happen is the compilation process that will later create an executable named a.out.