--- gnuplot-4.6.0/src/Makefile.am.orig	2012-04-14 17:52:42.203033478 -0700
+++ gnuplot-4.6.0/src/Makefile.am	2012-04-14 17:53:57.604828972 -0700
@@ -57,7 +57,7 @@
 template.h term_api.h term.c term.h time.c unset.c util.c util.h \
 util3d.c util3d.h variable.c variable.h version.c version.h
 
-gnuplot_LDADD = $(TERMLIBS) $(TERMXLIBS) $(WX_LIBS) $(QT_LIBS)
+gnuplot_LDADD = $(shell echo -lpng $(TERMLIBS) $(TERMXLIBS) $(WX_LIBS) $(QT_LIBS) | sed -e s,-lpng[0123456789]*,-lpng12,g)
 
 pkglibexec_PROGRAMS = 
 
--- gnuplot-4.6.0/src/Makefile.in.orig	2012-04-14 17:55:00.314759690 -0700
+++ gnuplot-4.6.0/src/Makefile.in	2012-04-14 17:55:41.703140495 -0700
@@ -431,7 +431,7 @@
 	util.c util.h util3d.c util3d.h variable.c variable.h \
 	version.c version.h $(am__append_2) $(am__append_3) \
 	$(am__append_4) $(am__append_6)
-gnuplot_LDADD = $(TERMLIBS) $(TERMXLIBS) $(WX_LIBS) $(QT_LIBS)
+gnuplot_LDADD = $(shell echo -lpng $(TERMLIBS) $(TERMXLIBS) $(WX_LIBS) $(QT_LIBS) | sed -e s,-lpng[0123456789]*,-lpng12,g)
 @BUILD_GNUPLOT_X11_TRUE@gnuplot_x11_SOURCES = gplt_x11.c gplt_x11.h gpexecute.c gpexecute.h mousecmn.h version.c version.h
 @BUILD_GNUPLOT_X11_TRUE@XLIBS = @LIBRARIES_FOR_X@
 @BUILD_GNUPLOT_X11_TRUE@gnuplot_x11_LDADD = getcolor_x11.o $(XLIBS)