Interesting, Rob. I ran into the same problem. I moved to a 32 bit XP box and went through the procedures and actually got G::O::I to build on that box. But like you when I tried Gtk3 I got the following:

C:\usr\local\Cairo-GObject-1.001>perl Makefile.pl
Can't load 'C:/strawberry/perl/site/lib/auto/Glib/Glib.dll' for module
+ Glib: loa
d_file:The specified module could not be found at C:/strawberry/perl/l
+ib/DynaLoa
der.pm line 190.
 at (eval 10) line 1.
Compilation failed in require at (eval 10) line 1.
BEGIN failed--compilation aborted at (eval 10) line 1.

Checking if your kit is complete...
Looks good
Warning: Guessing NAME [Cairo-GObject] from current directory name.
Warning: NAME must be a package name
Can't locate object method "postamble_clean" via package "Glib::MakeHe
+lper" (per
haps you forgot to load "Glib::MakeHelper"?) at Makefile.pl line 77.
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I wrote a perl script so I could keep track of the procedure. I built the script on my W7 box per your procedures, etc. It was that script that I ran on the XP box that allowed me to get G::O::I installed. But still no Gtk3.

Thanks,

Don

Here is the perl script I am messing around with. I'm just using it to ensure when I finally get Gtk3 installed and working I can reproduce the complete install again.

#!/usr/bin/perl
#
# download all-in-one bundle from 
# http://win32builder.gnome.org/gtk+-bundle_3.6.4-20130921_win32.zip
#
#

use strict;
use warnings;

my ($cmd,$res);

print "\n";

# set environment

&SetEnvironment();

$cmd = "copy C\:\\Gtk3.6.4\\lib\\libffi.dll.a C:\\Gtk3.6.4\\lib\\libff
+i.a";
print "$cmd\n\n";
$res =`$cmd`;
print "$res\n";

$cmd = "copy C\:\\usr\\local\\lib\\girepository.lib C:\\usr\\local\\li
+b\\libgirepository-1.0.a";
print "$cmd\n\n";
$res =`$cmd`;
print "$res\n";

# install Cairo

&PpmInstall("Cairo","ppm install http://www.sisyphusion.tk/ppm/Cairo.p
+pd");

# install ExtUtils::PkgConfig

&CpanInstall("ExtUtils::PkgConfig");

# install ExtUtils::Depends

&CpanInstall("ExtUtils::Depends");

# install Glib

&MakefileInstall("Glib","C\:\\usr\\local\\Glib-1.304");

# install Glib::Object::Introspection

&MakefileInstall("Glib::Object::Introspection","C\:\\usr\\local\\Glib-
+Object-Introspection-0.020");

sub CpanInstall
{
  print "\nInstalling $_[0]\n\n";
  my $cmd = "cpan $_[0]";
  print "$cmd\n\n";
  my $res = `$cmd`;
  print "$res\n";
}

sub MakefileInstall
{
  print "\nInstalling $_[0]\n\n";
  my $targetDir = $_[1];
  chdir($targetDir) or die "Cant chdir to $targetDir $!";
  my $currentDir = `cd`;
  print "\nCurrent Directory = $currentDir\n";
  my $cmd = "perl Makefile.PL";
  print "$cmd\n\n";
  my $res = `$cmd`;
  print "$res\n";
  $cmd = "dmake";
  print "$cmd\n\n";
  $res = `$cmd`;
  print "$res\n\n";
  $cmd = "dmake install";
  print "$cmd\n\n";
  $res = `$cmd`;
  print "$res\n";
}

sub PpmInstall
{
  print "\nInstalling $_[0]\n\n";
  my $cmd = $_[1];
  print "$cmd\n\n";
  my $res = `$cmd`;
  print "$res\n";
}

sub SetEnvironment
{
  $ENV{'PATH'} = "C:\\usr\\local\\bin;C:\\Gtk3.6.4\\bin;" . $ENV{'PATH
+'};
  my $cmd = "set PATH=C:\\usr\\local\\bin;C:\\Gtk3.6.4\\bin;%PATH%";
  print "$cmd\n";
  my $res = `$cmd`;
  print "$res\n";

  $ENV{'PKG_CONFIG_PATH'} = "C:\\usr\\local\\lib\\pkgconfig;C:\\Gtk3.6
+.4\\lib\\pkgconfig";
  $cmd = "set PKG_CONFIG_PATH=C:\\usr\\local\\lib\\pkgconfig;C:\\Gtk3.
+6.4\\lib\\pkgconfig";
  print "$cmd\n";
  $res = `$cmd`;
  print "$res\n";

  $ENV{'CPATH'} = "C:\\usr\\local\\include\\gobject-introspection-1.34
+.2";
  $ENV{'CPATH'} = "C:\\usr\\local\\include\\libffi-3.0.11;" . $ENV{'CP
+ATH'};
  $cmd = "set CPATH=C:\\usr\\local\\include\\gobject-introspection-1.3
+4.2";
  print "$cmd\n";
  $res = `$cmd`;
  print "$res\n";

  $ENV{'GI_TYPELIB_PATH'} = "C:\\usr\\local\\lib\\girepository-1.0";
  $cmd = "set GI_TYPELIB_PATH=C:\\usr\\local\\lib\\girepository-1.0";
  print "$cmd\n";
  $res = `$cmd`;
  print "$res\n";

    printf("%-15.15s: $ENV{PATH}\n", "PATH");
    printf("%-15.15s: $ENV{PKG_CONFIG_PATH}\n", "PKG_CONFIG_PATH");
    printf("%-15.15s: $ENV{CPATH}\n", "CPATH");
    printf("%-15.15s: $ENV{GI_TYPELIB_PATH}\n", "GI_TYPELIB_PATH");
}
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