[libpng16] $(CP) is now used alongside $(RM_F). Also, use 'copy' instead
of 'cp' where applicable, and applied other minor makefile changes.
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index c0eb5ab..5599d75 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -36,7 +36,7 @@
# see scripts/pnglibconf.mak for more options
pnglibconf.h: scripts/pnglibconf.h.prebuilt
- cp scripts/pnglibconf.h.prebuilt $@
+ cp $< $@
pngtest.o: pngtest.c
${CC} ${CPPFLAGS} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}