gcc -S a.c

##</code><code>##

$ cat a.c
#include <stdio.h>

int main() {
   printf("Hello, World!\n");
   return 0;
}

##</code><code>##

$ cat a.s
        .file   "a.c"
        .section        .rodata
.LC0:
        .string "Hello, World!"
        .text
.globl main
        .type   main, @function
main:
        leal    4(%esp), %ecx
        andl    $-16, %esp
        pushl   -4(%ecx)
        pushl   %ebp
        movl    %esp, %ebp
        pushl   %ecx
        subl    $4, %esp
        movl    $.LC0, (%esp)
        call    puts
        movl    $0, %eax
        addl    $4, %esp
        popl    %ecx
        popl    %ebp
        leal    -4(%ecx), %esp
        ret
        .size   main, .-main
        .ident  "GCC: (Debian 4.3.2-1.1) 4.3.2"
        .section        .note.GNU-stack,"",@progbits