Define MEMMOVE_MISSING if it is missing and we are using GNU malloc.

configure.in

-dnl $Id: configure.in,v 1.28 1995/11/02 19:47:07 ceder Exp $
+dnl $Id: configure.in,v 1.29 1995/11/02 21:51:23 ceder Exp $
 dnl Configuration for LysKOM
 dnl Copyright (C) 1993, 1994, 1995  Lysator Academic Computer Association.
 dnl
@@ -18,7 +18,7 @@ dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 dnl
 dnl Please mail bug reports to bug-lyskom@lysator.liu.se. 
 dnl
-AC_REVISION($Revision: 1.28 $)
+AC_REVISION($Revision: 1.29 $)
 AC_INIT(src/server/lyskomd.h)
 AC_ARG_WITH([gnu-malloc],
 	[  --with-gnu-malloc       use GNU malloc],
@@ -115,6 +115,7 @@ dnl
 dnl	GNU Malloc also needs these:
 dnl
 	AC_CHECK_FUNCS(getpagesize)
+	AC_CHECK_FUNC(memmove,,AC_DEFINE(MEMMOVE_MISSING))
 	AC_CHECK_HEADERS(unistd.h)
 dnl
 dnl	AC_USG is obsolete, but GNU malloc still uses it.