[m-rev.] diff: avoid another problem with expr on freebsd

[Julien Fischer]

Branches: main, 10.04

Avoid another problem with expr on FreeBSD.

scripts/parse_ml_options.sh-subr.in:
 	Avoid invoking expr with a first argument that has a leading
 	minus sign.

Julien.

Index: scripts/parse_ml_options.sh-subr.in
===================================================================
RCS file: /home/mercury/mercury1/repository/mercury/scripts/parse_ml_options.sh-subr.in,v
retrieving revision 1.13
diff -u -r1.13 parse_ml_options.sh-subr.in
--- scripts/parse_ml_options.sh-subr.in	23 Dec 2007 23:57:19 -0000	1.13
+++ scripts/parse_ml_options.sh-subr.in	2 Dec 2010 03:30:29 -0000
@@ -373,7 +373,7 @@
  		shift
  		;;
  	-R*)
-		dir="` expr $1 : '-R\(.*\)' `"
+		dir="` expr X$1 : 'X-R\(.*\)' `"
  		case $leave_shlib_dirs_relative in false)
  			case "$dir" in
  				/*) ;;

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