5196 The cw wrapper restricts gcc to -O2

@@ -25,10 +25,11 @@
 #
 
 #
 # Copyright (c) 2012 by Delphix. All rights reserved.
 # Copyright (c) 2013, Joyent, Inc. All rights reserved.
+# Copyright 2014 Gary Mills
 #
 
 #
 # WARNING: Do not include Makefile.ctf here. That will cause tests to
 # break.

@@ -52,11 +53,11 @@
 fasttrap/tst.stack.exe := LDLIBS += -ldtrace
 
 sysevent/tst.post.exe := LDLIBS += -lsysevent
 sysevent/tst.post_chan.exe := LDLIBS += -lsysevent
 
-ustack/tst.bigstack.exe := COPTFLAG += -xO1
+ustack/tst.bigstack.exe := COPTFLAG = $(ADJUST_OPT1) -_cc=-xO1 -_gcc=-O1
 
 GCC = $(ONBLD_TOOLS)/bin/$(MACH)/cw -_gcc
 
 nfs/%.o: $(SNOOPDIR)/%.c
         $(COMPILE.c) -o $@ $< -I$(SNOOPDIR)