Imported from libpng-1.2.3rc1.tar
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index 4b2fe85..3c0a0a6 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -33,11 +33,22 @@
 
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.2
+PNGMIN = 1.2.3rc1
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include
 LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, that location must already exist before
+# you execute make install.
+DESTDIR=
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
@@ -50,12 +61,15 @@
 .c.pic.o:
 	$(CC) -c $(CFLAGS) -KPIC -o $@ $*.c
 
-all: libpng.a $(LIBNAME).so pngtest
+all: libpng.a $(LIBNAME).so pngtest libpng.pc
 
 libpng.a: $(OBJS)
 	ar rc $@ $(OBJS)
 	$(RANLIB) $@
 
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
+
 $(LIBNAME).so: $(LIBNAME).so.$(PNGMAJ)
 	ln -f -s $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so
 
@@ -85,42 +99,61 @@
 	./pngtest
 
 install-headers: png.h pngconf.h
-	-@if [ ! -d $(INCPATH) ]; then mkdir $(INCPATH); fi
-	-@if [ ! -d $(INCPATH)/$(LIBNAME) ]; then mkdir $(INCPATH)/$(LIBNAME); fi
-	cp png.h pngconf.h $(INCPATH)/$(LIBNAME)
-	chmod 644 $(INCPATH)/$(LIBNAME)/png.h $(INCPATH)/$(LIBNAME)/pngconf.h
-	-@/bin/rm -f $(INCPATH)/png.h $(INCPATH)/pngconf.h
-	-@/bin/rm $(INCPATH)/libpng
-	ln -f -s $(INCPATH)/$(LIBNAME) $(INCPATH)/libpng
+	-@if [ ! -d $(DESTDIR)$(INCPATH) ]; then mkdir $(DESTDIR)$(INCPATH); fi
+	-@if [ ! -d $(DESTDIR)$(INCPATH)/$(LIBNAME) ]; then \
+	mkdir $(DESTDIR)$(INCPATH)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DESTDIR)$(INCPATH)/$(LIBNAME)
+	chmod 644 $(DESTDIR)$(INCPATH)/$(LIBNAME)/png.h \
+	$(DESTDIR)$(INCPATH)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DESTDIR)$(INCPATH)/png.h $(DESTDIR)$(INCPATH)/pngconf.h
+	-@/bin/rm $(DESTDIR)$(INCPATH)/libpng
+	(cd $(DESTDIR)$(INCPATH); ln -f -s $(LIBNAME) libpng; \
+	ln -f -s $(LIBNAME)/* .)
 
 install-static: install-headers libpng.a
-	-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
-	cp libpng.a $(LIBPATH)/$(LIBNAME).a
-	chmod 644 $(LIBPATH)/$(LIBNAME).a
-	-@/bin/rm -f $(LIBPATH)/libpng.a
-	ln -f -s $(LIBPATH)/$(LIBNAME).a $(LIBPATH)/libpng.a
+	-@if [ ! -d $(DESTDIR)$(LIBPATH) ]; then mkdir $(DESTDIR)$(LIBPATH); fi
+	cp libpng.a $(DESTDIR)$(LIBPATH)/$(LIBNAME).a
+	chmod 644 $(DESTDIR)$(LIBPATH)/$(LIBNAME).a
+	-@/bin/rm -f $(DESTDIR)$(LIBPATH)/libpng.a
+	(cd $(DESTDIR)$(LIBPATH); ln -f -s $(LIBNAME).a libpng.a)
 
 install-shared: install-headers $(LIBNAME).so.$(PNGVER)
-	-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
-	-@/bin/rm -f $(LIBPATH)/$(LIBNAME).so.$(PNGMAJ)* $(LIBPATH)/$(LIBNAME).so
-	-@/bin/rm -f $(LIBPATH)/libpng.so
-	-@/bin/rm -f $(LIBPATH)/libpng.so.3
-	-@/bin/rm -f $(LIBPATH)/libpng.so.3.*
-	cp $(LIBNAME).so.$(PNGVER) $(LIBPATH)
-	chmod 755 $(LIBPATH)/$(LIBNAME).so.$(PNGVER)
-	(cd $(LIBPATH); \
+	-@if [ ! -d $(DESTDIR)$(LIBPATH) ]; then mkdir $(DESTDIR)$(LIBPATH); fi
+	-@/bin/rm -f $(DESTDIR)$(LIBPATH)/$(LIBNAME).so.$(PNGMAJ)* \
+	$(DESTDIR)$(LIBPATH)/$(LIBNAME).so
+	-@/bin/rm -f $(DESTDIR)$(LIBPATH)/libpng.so
+	-@/bin/rm -f $(DESTDIR)$(LIBPATH)/libpng.so.3
+	-@/bin/rm -f $(DESTDIR)$(LIBPATH)/libpng.so.3.*
+	cp $(LIBNAME).so.$(PNGVER) $(DESTDIR)$(LIBPATH)
+	chmod 755 $(DESTDIR)$(LIBPATH)/$(LIBNAME).so.$(PNGVER)
+	(cd $(DESTDIR)$(LIBPATH); \
 	ln -sf $(LIBNAME).so.$(PNGVER) libpng.so; \
 	ln -f -s $(LIBNAME).so.$(PNGVER) libpng.so.3; \
 	ln -f -s $(LIBNAME).so.$(PNGVER) libpng.so.3.$(PNGMIN); \
 	ln -f -s $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ); \
 	ln -f -s $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so)
-	-@if [ ! -d $(LIBPATH)/pkgconfig ]; then mkdir $(LIBPATH)/pkgconfig; fi
-	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
-	cp libpng.pc $(LIBPATH)/pkgconfig/libpng12.pc
-	chmod 644 $(LIBPATH)/pkgconfig/libpng12.pc
+	-@if [ ! -d $(DESTDIR)$(LIBPATH)/pkgconfig ]; then \
+	mkdir $(DESTDIR)$(LIBPATH)/pkgconfig; fi
+	cp libpng.pc $(DESTDIR)$(LIBPATH)/pkgconfig/libpng12.pc
+	chmod 644 $(DESTDIR)$(LIBPATH)/pkgconfig/libpng12.pc
+	(cd $(DESTDIR)$(LIBPATH)/pkgconfig; ln -f -s libpng12.pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(MANPATH) ]; then mkdir $(MANPATH); fi
+	-@if [ ! -d $(MANPATH)/man3 ]; then mkdir $(MANPATH)/man3; fi
+	-@/bin/rm -f $(MANPATH)/man3/libpng.3
+	-@/bin/rm -f $(MANPATH)/man3/libpngpf.3
+	cp libpng.3 $(MANPATH)/man3
+	cp libpngpf.3 $(MANPATH)/man3
+	-@if [ ! -d $(MANPATH)/man5 ]; then mkdir $(MANPATH)/man5; fi
+	-@/bin/rm -f $(MANPATH)/man5/png.5
+	cp png.5 $(MANPATH)/man5
+
+install: install-static install-shared install-man
 
 clean:
-	/bin/rm -f *.o libpng.a $(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* pngtest pngout.png
+	/bin/rm -f *.o libpng.a $(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* \
+	pngtest pngout.png
 
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