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+?RCS: $Id: contains.U,v 3.0 1993/08/18 12:05:35 ram Exp $
+?RCS:
+?RCS: Copyright (c) 1991-1993, Raphael Manfredi
+?RCS:
+?RCS: You may redistribute only under the terms of the Artistic Licence,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic Licence; a copy of which may be found at the root
+?RCS: of the source tree for dist 3.0.
+?RCS:
+?RCS: $Log: contains.U,v $
+?RCS: Revision 3.0 1993/08/18 12:05:35 ram
+?RCS: Baseline for dist 3.0 netwide release.
+?RCS:
+?MAKE:contains: Nothing
+?MAKE: -pick add $@ %<
+?S:contains:
+?S: This variable holds the command to do a grep with a proper return
+?S: status. On most sane systems it is simply "grep". On insane systems
+?S: it is a grep followed by a cat followed by a test. This variable
+?S: is primarily for the use of other Configure units.
+?S:.
+: Some greps do not return status, grrr.
+echo "grimblepritz" >grimble
+if grep blurfldyick grimble >/dev/null 2>&1 ; then
+ contains=contains
+elif grep grimblepritz grimble >/dev/null 2>&1 ; then
+ contains=grep
+else
+ contains=contains
+fi
+rm -f grimble
+: the following should work in any shell
+case "$contains" in
+contains*)
+ echo " "
+ echo "AGH! Grep doesn't return a status. Attempting remedial action."
+ cat >contains <<'EOSS'
+grep "$1" "$2" >.greptmp && cat .greptmp && test -s .greptmp
+EOSS
+chmod +x contains
+esac
+