patch-Makefile.OSX-10.6.diff

--- pdftk/Makefile.OSX-10.6.orig 2013-07-24 21:27:36.000000000 +0300
+++ pdftk/Makefile.OSX-10.6	2013-08-12 19:44:24.000000000 +0300
@@ -20,13 +20,13 @@
 
 # tools
 # need direct path to libgcj for gcjh (starting in gcj 4.1.2 per Aurélien GÉRÔME)
-TOOLPATH=/sw/lib/gcc4.5/bin/
-export VERSUFF=-fsf-4.5
+TOOLPATH=@HOMEBREW_PREFIX@/bin/
+export VERSUFF= -4.6
 export CXX= $(TOOLPATH)g++$(VERSUFF)
 export GCJ= $(TOOLPATH)gcj$(VERSUFF)
 export GCJH= $(TOOLPATH)gcjh$(VERSUFF)
 export GJAR= $(TOOLPATH)gjar$(VERSUFF)
-export LIBGCJ= /sw/lib/gcc4.5/share/java/libgcj-4.5.0.jar
+export LIBGCJ= @PREFIX@/share/java/libgcj-@[email protected]
 export AR= ar
 export RM= rm
 export ARFLAGS= rs
@@ -63,11 +63,10 @@
 # only effects libraries following option on the command line
 #
 #  
-export MACOSX_DEPLOYMENT_TARGET= 10.4
-export CPPFLAGS= -DPATH_DELIM=0x2f -DASK_ABOUT_WARNINGS=false -DUNBLOCK_SIGNALS -fdollars-in-identifiers -mmacosx-version-min=10.4
+export CPPFLAGS= -DPATH_DELIM=0x2f -DASK_ABOUT_WARNINGS=false -DUNBLOCK_SIGNALS -fdollars-in-identifiers
 export CXXFLAGS= -Wall -Wextra -Weffc++ -O2
-export GCJFLAGS= -Wall -fsource=1.3 -O2
+export GCJFLAGS= -Wall -fno-assert -O2
 export GCJHFLAGS= -force
-export LDLIBS= /sw/lib/gcc4.5/lib/libgcj.dylib /sw/lib/gcc4.5/lib/libstdc++.dylib /sw/lib/gcc4.5/lib/libgcc_s.1.dylib -liconv -lz
+export LDLIBS= @PREFIX@/gcc/lib/libgcj.dylib @PREFIX@/gcc/lib/libstdc++.dylib @PREFIX@/gcc/lib/libgcc_s.1.dylib -liconv -lz
 
 include Makefile.Base

pdftk.rb

require 'formula'

class Pdftk < Formula
  url 'http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/pdftk-2.02-src.zip'
  homepage 'http://www.pdflabs.com/'
  sha1 'a4a27e984c5e1401cfa44b8e92a64113d7396a06'

  depends_on 'ecj'
  depends_on 'gcc46' => 'enable-java'
  
  def patches
    # make it compartible with modern OS X
    "https://gist.github.com/sxua/6210636/raw/d1d1c00ae67365799ecc59009a38643d888f7bc2/patch-Makefile.OSX-10.6.diff"
  end

  def install
    doc.mkpath
    doc.install "changelog.html" "changelog.txt" "pdftk.1.html" "pdftk.1.txt"
    man1.install "pdftk.1"

    cd "pdftk" do
      inreplace "Makefile.OSX-10.6" do |s|
        s.gsub! "@HOMEBREW_PREFIX@", "#{HOMEBREW_PREFIX}"
        s.gsub! "@PREFIX@", "#{Formula.factory('gcc46').prefix}"
        s.gsub! "@GCC_VERSION", "#{Formula.factory('gcc46').version}"
        s.remove_make_var! "VERSUFF"
      end
      system "make -f Makefile.OSX-10.6"
      bin.install "pdftk"
    end
  end
end

I was not able to make this gist work.

It failed on the patching step, not recognizing the correct file to modify I believe. However, i was able to make the changes to the makefile by hand, using your gist and diff to understand what needed to be done, and i was able to compile pdftk 1.45 with gcc47 installed frome homebrew with --enable-java

If you came here (as I did) looking for a fully working Homebrew formula for pdftk, I hope this tap will help. It's my first formula, so feedback is welcome.