#!/usr/bin/perl

use strict;
use warnings;
use v5.10;

open my $FILE ,"makefile.txt";

my $accum="";
while(<$FILE>){
	chomp;
	if(s%(.*?)\\$% %){             
		$accum.=$1;              
	} else {
		$accum.=$_;              
		$accum=~s/\s+/ /gs;      
		say $accum;  		 
		$accum="";		 
	}
}