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$NetBSD: patch-ad,v 1.1 2016/10/08 23:01:45 kamil Exp $

make sure no one sneaks a -O* in on us via one of these variables
set in the environment

--- Makefile.in.orig	2013-08-20 04:10:31.000000000 +0900
+++ Makefile.in	2013-12-20 11:35:09.000000000 +0900
@@ -222,6 +222,17 @@
 
 lexor.o: lexor.cc parse.h
 
+# make sure no one sneaks a -O* in on us via one of these variables
+# set in the environment
+CXX_NOOPT=$(CXX:-O%=)
+CPPFLAGS_NOOPT=$(CPPFLAGS:-O%=)
+CXXFLAGS_NOOPT=$(CXXFLAGS:-O%=)
+
+parse.o: parse.cc
+	@[ -d dep ] || mkdir dep
+	$(CXX_NOOPT) $(CPPFLAGS_NOOPT) $(CXXFLAGS_NOOPT) -MD -c $< -o $*.o
+	mv $*.d dep/$*.d
+
 parse.o: parse.cc
 
 # Build this in two steps to avoid parallel build issues (see pr3462585)