$ diff -U1 Makefile.OSX-10.{6,11}

pdftk-2.02-Makefile-OSX-10.11.patch

--- Makefile.OSX-10.6   2013-07-25 03:27:36.000000000 +0900
+++ Makefile.OSX-10.11  2015-10-06 19:47:39.000000000 +0900
@@ -22,4 +22,4 @@
 # 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=/usr/local/bin/
+export VERSUFF=-5
 export CXX= $(TOOLPATH)g++$(VERSUFF)
@@ -28,3 +28,3 @@
 export GJAR= $(TOOLPATH)gjar$(VERSUFF)
-export LIBGCJ= /sw/lib/gcc4.5/share/java/libgcj-4.5.0.jar
+export LIBGCJ= /usr/local/share/java/libgcj-5.2.0.jar
 export AR= ar
@@ -33,2 +33,5 @@
 export RMFLAGS= -vf
+export JAVAC= /usr/bin/javac
+export JAVAH= /usr/bin/javah
+export JAR= /usr/bin/jar

@@ -65,8 +68,10 @@
 #
-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 MACOSX_DEPLOYMENT_TARGET= 10.11
+export CPPFLAGS= -DPATH_DELIM=0x2f -DASK_ABOUT_WARNINGS=false -DUNBLOCK_SIGNALS -fdollars-in-identifiers -mmacosx-version-min=10.11
 export CXXFLAGS= -Wall -Wextra -Weffc++ -O2
 export GCJFLAGS= -Wall -fsource=1.3 -O2
+export JAVACFLAGS= -Xlint
 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 JAVAHFLAGS= -force
+export LDLIBS= /usr/local/Cellar/gcc/5.2.0/lib/gcc/5/libstdc++.dylib /usr/local/Cellar/gcc/5.2.0/lib/gcc/5/libgcc_s.1.dylib -liconv -lz