--- pngnq-1.0.orig/configure.ac	2009-05-20 14:05:52.000000000 +0200
+++ pngnq-1.0/configure.ac	2010-01-14 17:55:44.612378097 +0100
@@ -24,6 +24,10 @@
 AC_FUNC_STAT
 AC_HEADER_STDBOOL
 
+AC_SEARCH_LIBS([gzopen],[z])
+AC_SEARCH_LIBS([pow],[m])
+PKG_CHECK_MODULES([PNG], [libpng >= 1.2.0])
+
 # checks for library functions
 AC_CHECK_FUNCS([getopt])
 AC_CHECK_FUNCS([floor])
--- pngnq-1.0.orig/Makefile.am	2009-05-20 14:05:52.000000000 +0200
+++ pngnq-1.0/Makefile.am	2010-01-14 17:54:35.844539430 +0100
@@ -1,3 +1,3 @@
-SUBDIRS = freegetopt src
+SUBDIRS = src
 
 dist_man_MANS = pngnq.1
--- pngnq-1.0.orig/src/Makefile.am	2009-05-20 14:04:15.000000000 +0200
+++ pngnq-1.0/src/Makefile.am	2010-01-14 17:54:21.551539573 +0100
@@ -1,6 +1,7 @@
-AM_LDFLAGS = ${shell libpng-config --ldflags} -lz
-AM_CFLAGS = ${shell libpng-config --I_opts} -Wall --pedantic -std=gnu99
-
 bin_PROGRAMS = pngnq pngcomp
 pngnq_SOURCES = pngnq.c neuquant32.c rwpng.c  neuquant32.h rwpng.h errors.h
+pngnq_LDADD  = @PNG_LIBS@
+pngnq_CFLAGS = @PNG_CFLAGS@
 pngcomp_SOURCES = pngcomp.c rwpng.c colorspace.c  colorspace.h
+pngcomp_LDADD  = @PNG_LIBS@
+pngcomp_CFLAGS = @PNG_CFLAGS@