#!/usr/bin/perl

$a = join ('',<STDIN>);
$a =~ s/\\\n/ /g;		# join continued lines
$a =~ s/(^\S+:)/$ARGV[0]$1/gm;	# put prefix in front of rules
$a =~ s/\s+\/\S+/ /g;		# remove absolute path dependencies
$a =~ s/\s+\n/\n/g;		# remove whitespace at end of lines
$a =~ s/[ \t]+/ /g;		# clean up interior whitespace
$a =~ s/ / \\\n  /g;		# put back line continuations

print $a;