#!/usr/bin/perl
use warnings;

if ($#ARGV < 0){@ARGV = qw(a b c d)}

&afork (\@ARGV,4,\&mysub);

print "Main says: All done now\n";

sub mysub{
 my $x = $_[0];
 system "mkdir dir$x";
 chdir "dir$x"or die $!;
 for ($i=1;$i<10;$i++) {
 system "touch $i-$x";
 # open3(OUTPUT, INPUT, ERRORS, cd dir$x;make clean; make all);   
 #<code to process the output of the make commands and store into log files> 
}
}

################################################## 
sub afork (\@$&) {
my ($data, $max, $code) = @_;
my $c = 0;
foreach my $data (@$data) {
wait unless ++ $c <= $max;
die "Fork failed: $!\n" unless defined (my $pid = fork);
exit $code -> ($data) unless $pid;
}
1 until -1 == wait;
}
#####################################################