[m-rev.] trivial diff: bug fix for smart recompilation

[Simon Taylor]

Estimated hours taken: 0.5
Branches: main

scripts/Mmake.vars.in
	Define the $(useds_subdir) variable, which is used
	by the clean target. This fixes recompilation test
	case failures on mars.

Index: Mmake.vars.in
===================================================================
RCS file: /home/mercury1/repository/mercury/scripts/Mmake.vars.in,v
retrieving revision 1.57
diff -u -u -r1.57 Mmake.vars.in
--- Mmake.vars.in	12 Aug 2001 13:29:17 -0000	1.57
+++ Mmake.vars.in	28 Oct 2001 18:03:03 -0000
@@ -438,6 +438,7 @@
 date3s_subdir=$(SUBDIR)date3s/
 optdates_subdir=$(SUBDIR)optdates/
 trans_opt_dates_subdir=$(SUBDIR)trans_opt_dates/
+useds_subdir=$(SUBDIR)useds/
 cs_subdir=$(SUBDIR)cs/
 dlls_subdir=$(SUBDIR)dlls/
 ss_subdir=$(SUBDIR)ss/
@@ -472,6 +473,7 @@
 date3s_subdir=
 optdates_subdir=
 trans_opt_dates_subdir=
+useds_subdir=
 cs_subdir=
 dlls_subdir=
 ss_subdir=
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