[libpng16] Eliminated use of "$<" when copying $PNGLIBCONF_H_PREBUILT in
makefiles. This does not work on some versions of make; bug introduced in
libpng version 1.6.11.
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index f80baf2..38bb2d5 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -39,7 +39,7 @@
$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
- cp $< $@
+ cp $(PNGLIBCONF_H_PREBUILT) $@
pngtest.o: pngtest.c
${CC} ${CPPFLAGS} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}