diff --git a/Basic/Math/Makefile.PL b/Basic/Math/Makefile.PL
index c19b29a0e..e15dada15 100644
--- a/Basic/Math/Makefile.PL
+++ b/Basic/Math/Makefile.PL
@@ -1,39 +1,10 @@
 use strict;
 use warnings;
-use ExtUtils::MakeMaker;
-
-# Files for each routine (.c assumed)
-my %source = qw(
-  j0 j0
-  j1 j1
-  jn jn
-  y0 j0
-  y1 j1
-  yn yn
-);
-my @keys = sort keys %source;
-
-my $libs = get_maths_libs();
-# Test for presence of besfuncs
-my $include = qq{#include "mconf.h"};
-$source{$_} = 'system' for grep trylink('', $include, "$_(1.);", $libs), qw(j0 j1 y0 y1);
-$source{$_} = 'system' for grep trylink('', $include, "$_(1,1.);", $libs), qw(jn yn);
 
 my @pack = (["math.pd", qw(Math PDL::Math)]);
 my %hash = pdlpp_stdargs_int(@pack);
-
-my %seen; # Build object file list
-foreach my $func (@keys) {
-   my $file = $source{$func};
-   next if $file eq 'system';
-   die "File for function $func not found\n" if $file eq '';
-   $hash{OBJECT} .= " $file\$(OBJ_EXT)" unless $seen{$file}++;
-}
-
-# Add support routines
-$hash{OBJECT} .= join '', map " $_\$(OBJ_EXT)", qw(const mtherr polevl cpoly ndtri);
-
-$hash{LIBS}[0] .= " $libs";
+$hash{OBJECT} .= $PDL::Core::Dev::EXTRAS{'math.pd'}{OBJECT};
+$hash{LIBS}[0] .= " " . PDL::Core::Dev::get_maths_libs();
 
 undef &MY::postamble; # suppress warning
 *MY::postamble = sub {
diff --git a/Basic/Math/math.pd b/Basic/Math/math.pd
index 6949fcbf5..4ae5e0150 100644
--- a/Basic/Math/math.pd
+++ b/Basic/Math/math.pd
@@ -4,6 +4,34 @@ use Config;
 use PDL::Types qw(ppdefs ppdefs_complex types);
 require PDL::Core::Dev;
 
+{ # pass info back to Makefile.PL
+# Files for each routine (.c assumed)
+my %source = qw(
+  j0 j0
+  j1 j1
+  jn jn
+  y0 j0
+  y1 j1
+  yn yn
+);
+my @keys = sort keys %source;
+my $libs = PDL::Core::Dev::get_maths_libs();
+# Test for presence of besfuncs
+require File::Spec::Functions;
+my $include = qq{#include "}.File::Spec::Functions::rel2abs('mconf.h').qq{"};
+$source{$_} = 'system' for grep PDL::Core::Dev::trylink('', $include, "$_(1.);", $libs), qw(j0 j1 y0 y1);
+$source{$_} = 'system' for grep PDL::Core::Dev::trylink('', $include, "$_(1,1.);", $libs), qw(jn yn);
+my %seen; # Build object file list
+foreach my $func (@keys) {
+   my $file = $source{$func};
+   next if $file eq 'system';
+   die "File for function $func not found\n" if $file eq '';
+   $PDL::Core::Dev::EXTRAS{$::PDLMOD}{OBJECT} .= " $file\$(OBJ_EXT)" unless $seen{$file}++;
+}
+# Add support routines
+$PDL::Core::Dev::EXTRAS{$::PDLMOD}{OBJECT} .= join '', map " $_\$(OBJ_EXT)", qw(const mtherr polevl cpoly ndtri);
+}
+
 my $R = [ppdefs()];
 my $F = [map $_->ppsym, grep $_->real && !$_->integer, types()];
 my $C = [ppdefs_complex()];
diff --git a/Basic/lib/PDL/Core/Dev.pm b/Basic/lib/PDL/Core/Dev.pm
index 259e3c04c..c1fab9610 100644
--- a/Basic/lib/PDL/Core/Dev.pm
+++ b/Basic/lib/PDL/Core/Dev.pm
@@ -109,7 +109,6 @@ perl's C<%Config> array.
 
 # big/little endian?
 sub isbigendian {
-    use Config;
     my $byteorder = $Config{byteorder} ||
 	die "ERROR: Unable to find 'byteorder' in perl's Config\n";
     return 1 if $byteorder eq "4321";
@@ -446,11 +445,7 @@ sub trylink {
   my $opt = ref $_[$#_] eq 'HASH' ? pop : {};
   my ($txt,$inc,$body,$libs,$cflags) = @_;
   $cflags ||= '';
-  require File::Spec;
   require File::Temp;
-  my $cdir = sub { return File::Spec->catdir(@_)};
-  my $cfile = sub { return File::Spec->catfile(@_)};
-  use Config;
   # check if MakeMaker should be used to preprocess the libs
   for my $key(keys %$opt) {$opt->{lc $key} = $opt->{$key}}
   my $mmprocess = exists $opt->{makemaker} && $opt->{makemaker};
@@ -464,11 +459,11 @@ sub trylink {
       print "processed LIBS: $libs[0]\n" unless $hide;
       $libs = $libs[0]; # replace by preprocessed libs
   }
-  print "     Trying $txt...\n     " unless $txt =~ /^\s*$/;
+  print "     Trying $txt...\n     " if $txt =~ /\S/;
   my $HIDE = !$hide ? '' : '>/dev/null 2>&1';
   if($^O =~ /mswin32/i) {$HIDE = '>NUL 2>&1'}
   my $tempd = File::Temp::tempdir(CLEANUP=>1) || die "trylink: could not make temp dir";
-  my ($tc,$te) = map {&$cfile($tempd,"testfile$_")} ('.c','');
+  my ($tc,$te) = map catfile($tempd,"testfile$_"), ('.c','');
   open FILE,">$tc" or die "trylink: couldn't open testfile `$tc' for writing, $!";
   my $prog = <<"EOF";
 $inc
diff --git a/Basic/lib/PDL/PP.pm b/Basic/lib/PDL/PP.pm
index 42ec9484c..d1212a1f0 100644
--- a/Basic/lib/PDL/PP.pm
+++ b/Basic/lib/PDL/PP.pm
@@ -539,7 +539,8 @@ sub list_functions {
   local *PDL::PP::pp_def = sub { push @funcs, (_pp_parsename($_[0]))[0]};
   undef &PDL::PP::pp_done;
   local *PDL::PP::pp_done = sub {};
-  $_ = '' for $::PDLMOD, $::CALLPACK, $::PDLOBJ; # stop warnings
+  $::PDLMOD = $file;
+  $_ ||= '' for $::CALLPACK, $::PDLOBJ; # stop warnings
   require File::Spec::Functions;
   do ''.File::Spec::Functions::rel2abs($file);
   die $@ if $@;