Perl: testing for makedepend to exist without using File::Where

does-makedepend-exist.pl

# http://perldoc.perl.org/perlop.html#Quote-Like-Operators
# ensure to take the stdout and stderror so we get output like this:
# 'makedepend: error:  cannot open "Makefile.makedepend" 
#'.
my $makedepend_output = `makedepend -f Makefile.makedepend 2>&1`;
if (!$makedepend_output)
  {
  print "No makedepend executable found on your path.\n";
  }
else
  {
  print "Output of makedepend: '$makedepend_output'.\n";
  }