diff --git a/mps/src/dc.gmk b/mps/src/dc.gmk
index fb47604aca1..426f6d1b191 100644
--- a/mps/src/dc.gmk
+++ b/mps/src/dc.gmk
@@ -1,7 +1,7 @@
 # impl.gmk.dc: GNUMAKEFILE FRAGMENT FOR DIGITAL C COMPILER (DEC UNIX/OSF)
 #
-# $HopeName: MMsrc!dc.gmk(trunk.1) $
-# Copyright(C) 1997 Harlequin Group, all rights reserved
+# $HopeName: MMsrc!dc.gmk(trunk.2) $
+# Copyright(C) 1997, 1998 Harlequin Group, all rights reserved
 #
 # See design.buildsys.unix
 #
@@ -16,17 +16,11 @@
 # as the last statement.  We would need to cleam our code in order to use
 # the option.
 
-# We need a symbol for a non-empty defintion with empty value
-ifdef MPS_EMPTY
-error "dc.gmk: MPS_EMPTY defined"
-endif
-
 CC = cc
 CFLAGSCOMPILER = -std1 -w2 -warnprotos -portable -readonly_strings
-CFLAGSHOT = -O2
-CFLAGSCOOL = $(MPS_EMPTY)
-CFLAGSEXTERNAL = $(MPS_EMPTY)
-CFLAGSINTERNAL = -g2
+CFLAGSDEBUG = -g2
+CFLAGSOPT = -O2 -g3
+CFLAGSOPTNODEBUG = -O2
 
 # -M for a dependency file
 
diff --git a/mps/src/lc.gmk b/mps/src/lc.gmk
index f3b6e300d07..6443eaa326d 100644
--- a/mps/src/lc.gmk
+++ b/mps/src/lc.gmk
@@ -1,7 +1,7 @@
 # impl.gmk.lc: GNUMAKEFILE FRAGMENT FOR LCC
 #
-# $HopeName: MMsrc!lc.gmk(trunk.1) $
-# Copyright (C) 1996,1997 Harlequin Group, all rights reserved
+# $HopeName: MMsrc!lc.gmk(trunk.2) $
+# Copyright (C) 1996,1997, 1998 Harlequin Group, all rights reserved
 #
 # This file is included by platform makefiles that use the LCC
 # compiler.  It defines the compiler specific variables that the
@@ -11,16 +11,15 @@
 # the time and ignores the -O flag.  Hence the empty CFLAGSOPTIMIZE
 # macro.
 
-# We need a symbol for a non-empty defintion with empty value
+# We need a symbol for a non-empty definition with empty value
 ifdef MPS_EMPTY
 error "lc.gmk: MPS_EMPTY defined"
 endif
 
 CC = lcc
 CFLAGSCOMPILER = -I/usr/include
-CFLAGSHOT = $(MPS_EMPTY)
-CFLAGSCOOL = $(MPS_EMPTY)
-CFLAGSINTERNAL = -g
-CFLAGSEXTERNAL = $(MPS_EMPTY)
+CFLAGSDEBUG = -g
+CFLAGSOPT = $(MPS_EMPTY)
+CFLAGSOPTNODEBUG = $(MPS_EMPTY)
 
 include comm.gmk