--- doxygen-1.4.6.orig/debian/patches/system-libpng.dpatch
+++ doxygen-1.4.6/debian/patches/system-libpng.dpatch
@@ -0,0 +1,121 @@
+#! /bin/sh -e
+
+# DP: Use the system libpng library
+
+dir=
+if [ $# -eq 3 -a "$2" = '-d' ]; then
+    pdir="-d $3"
+    dir="$3/"
+elif [ $# -ne 1 ]; then
+    echo >&2 "usage: `basename $0`: -patch|-unpatch [-d <srcdir>]"
+    exit 1
+fi
+case "$1" in
+    -patch)
+        patch $pdir -f --no-backup-if-mismatch -p1 < $0
+        ;;
+    -unpatch)
+        patch $pdir -f --no-backup-if-mismatch -R -p1 < $0
+        ;;
+    *)
+	echo >&2 "usage: `basename $0`: -patch|-unpatch [-d <srcdir>]"
+        exit 1
+esac
+exit 0
+
+diff -u ./src/pngenc.cpp.orig ./src/pngenc.cpp
+--- ./src/pngenc.cpp.orig	2004-01-06 04:40:25.000000000 +0100
++++ ./src/pngenc.cpp	2004-09-21 09:04:40.000000000 +0200
+@@ -25,7 +25,7 @@
+ #endif
+ 
+ #define ALL_STATIC
+-#include <../libpng/png.h>
++#include <png.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+diff -u ./Makefile.in.orig ./Makefile.in
+--- ./Makefile.in.orig	2003-11-13 04:40:21.000000000 +0100
++++ ./Makefile.in	2004-09-21 09:04:40.000000000 +0200
+@@ -7,7 +7,6 @@
+ 	cd doc ; $(MAKE) clean
+ 	cd qtools ; $(MAKE) clean
+ 	cd src ; $(MAKE) clean
+-	cd libpng ; $(MAKE) clean
+ 	cd libmd5 ; $(MAKE) clean
+ 	cd addon/doxywizard ; $(MAKE) clean
+ 	cd addon/doxmlparser/src ; $(MAKE) clean
+@@ -18,7 +17,6 @@
+ 
+ distclean: clean
+ 	cd src ; $(MAKE) distclean
+-	cd libpng ; $(MAKE) distclean
+ 	cd libmd5 ; $(MAKE) distclean
+ 	cd addon/doxywizard ; $(MAKE) distclean
+ 	cd addon/doxmlparser/src ; $(MAKE) distclean
+@@ -31,11 +29,10 @@
+ 	-rm -f objects/*.o
+ 	-rm -f src/Makefile.doxygen src/Makefile.libdoxygen 
+ 	-rm -f src/Makefile.doxytag src/Makefile.libdoxycfg
+-	-rm -f libpng/Makefile.libpng
+ 	-rm -f libmd5/Makefile.libmd5
+ 	-rm -f Makefile qtools/Makefile src/Makefile examples/Makefile doc/Makefile 
+ 	-rm -f .makeconfig .tmakeconfig
+-	-rm -f src/doxygen.pro src/libdoxygen.pro src/doxytag.pro qtools/qtools.pro src/libdoxycfg.pro libpng/libpng.pro libmd5/libmd5.pro
++	-rm -f src/doxygen.pro src/libdoxygen.pro src/doxytag.pro qtools/qtools.pro src/libdoxycfg.pro libmd5/libmd5.pro
+ 	-rm -f src/version.cpp
+ 	-rm -r addon/doxywizard/Makefile
+ 	-rm -f addon/doxywizard/Makefile.doxywizard
+diff -u ./configure.orig ./configure
+--- ./configure.orig	2004-09-14 04:40:12.000000000 +0200
++++ ./configure	2004-09-21 09:09:06.000000000 +0200
+@@ -457,7 +457,7 @@
+ EOF
+ fi
+ 
+-f_inmakefiles="Makefile.in qtools/Makefile.in src/Makefile.in examples/Makefile.in doc/Makefile.in addon/doxywizard/Makefile.in addon/doxmlparser/src/Makefile.in addon/doxmlparser/test/Makefile.in addon/doxmlparser/examples/metrics/Makefile.in libpng/Makefile.in libmd5/Makefile.in"
++f_inmakefiles="Makefile.in qtools/Makefile.in src/Makefile.in examples/Makefile.in doc/Makefile.in addon/doxywizard/Makefile.in addon/doxmlparser/src/Makefile.in addon/doxmlparser/test/Makefile.in addon/doxmlparser/examples/metrics/Makefile.in libmd5/Makefile.in"
+ 
+ for i in $f_inmakefiles ; do
+      SRC=$i
+@@ -474,7 +474,6 @@
+        echo "" >> $DST
+        echo "all: src/version.cpp " >> $DST
+        echo "	\$(MAKE) -C qtools" >> $DST
+-       echo "	\$(MAKE) -C libpng" >> $DST
+        echo "	\$(MAKE) -C libmd5" >> $DST
+        echo "	\$(MAKE) -C src" >> $DST
+        if test $f_wizard = YES; then
+@@ -491,7 +490,7 @@
+      echo "  Created $DST from $SRC..."
+ done
+ 
+-f_inprofiles="qtools/qtools.pro.in src/libdoxygen.pro.in src/libdoxycfg.pro.in src/doxygen.pro.in src/doxytag.pro.in addon/doxywizard/doxywizard.pro.in addon/doxmlparser/src/doxmlparser.pro.in addon/doxmlparser/test/xmlparse.pro.in addon/doxmlparser/examples/metrics/metrics.pro.in libpng/libpng.pro.in libmd5/libmd5.pro.in" 
++f_inprofiles="qtools/qtools.pro.in src/libdoxygen.pro.in src/libdoxycfg.pro.in src/doxygen.pro.in src/doxytag.pro.in addon/doxywizard/doxywizard.pro.in addon/doxmlparser/src/doxmlparser.pro.in addon/doxmlparser/test/xmlparse.pro.in addon/doxmlparser/examples/metrics/metrics.pro.in libmd5/libmd5.pro.in" 
+ 
+ for i in $f_inprofiles ; do
+      SRC=$i
+diff -u ./src/doxygen.pro.in.orig ./src/doxygen.pro.in
+--- ./src/doxygen.pro.in.orig	2004-05-18 04:40:13.000000000 +0200
++++ ./src/doxygen.pro.in	2004-09-21 09:58:06.000000000 +0200
+@@ -28,7 +28,7 @@
+ win32:TMAKE_CXXFLAGS       += -DQT_NODLL
+ win32-g++:LIBS             = -L../lib -ldoxygen -ldoxycfg -lqtools -lpng -lmd5
+ win32-g++:TMAKE_CXXFLAGS   += -fno-exceptions -fno-rtti
+-INCLUDEPATH                += ../qtools ../libpng ../libmd5 .
++INCLUDEPATH                += ../qtools ../libmd5 .
+ #win32-g++:INCLUDEPATH      -= ../libpng
+ DESTDIR                    =  ../bin
+ TARGET                     =  doxygen
+diff -u ./src/libdoxygen.pro.in.orig ./src/libdoxygen.pro.in
+--- ./src/libdoxygen.pro.in.orig	2004-08-25 04:40:18.000000000 +0200
++++ ./src/libdoxygen.pro.in	2004-09-21 09:58:55.000000000 +0200
+@@ -189,7 +189,6 @@
+ win32-msvc:TMAKE_CXXFLAGS  += -Zm200
+ win32-g++:TMAKE_CXXFLAGS   += -fno-exceptions -fno-rtti
+ INCLUDEPATH                += ../qtools
+-INCLUDEPATH                += ../libpng
+ INCLUDEPATH                += ../libmd5
+ win32:INCLUDEPATH          += .
+ win32-g++:INCLUDEPATH      = ../qtools /usr/include/libpng12 ../libmd5