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diff --git a/vendor/x11iraf/obm/Tcl/tclMtherr.c b/vendor/x11iraf/obm/Tcl/tclMtherr.c
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+/* 
+ * tclMatherr.c --
+ *
+ *	This function provides a default implementation of the
+ *	"matherr" function, for SYS-V systems where it's needed.
+ *
+ * Copyright (c) 1993 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ * 
+ * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
+ * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
+ * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ */
+
+#ifndef lint
+static char rcsid[] = "$Header: /user6/ouster/tcl/RCS/tclMtherr.c,v 1.7 93/10/31 16:19:31 ouster Exp $ SPRITE (Berkeley)";
+#endif /* not lint */
+
+#include "tclInt.h"
+#include <math.h>
+
+#ifndef TCL_GENERIC_ONLY
+#include "tclUnix.h"
+#else
+#define NO_ERRNO_H
+#endif
+
+#ifdef NO_ERRNO_H
+extern int errno;			/* Use errno from tclExpr.c. */
+#define EDOM 33
+#define ERANGE 34
+#endif
+
+/*
+ * The following variable is secretly shared with Tcl so we can
+ * tell if expression evaluation is in progress.  If not, matherr
+ * just emulates the default behavior, which includes printing
+ * a message.
+ */
+
+extern int tcl_MathInProgress;
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * matherr --
+ *
+ *	This procedure is invoked on Sys-V systems when certain
+ *	errors occur in mathematical functions.  Type "man matherr"
+ *	for more information on how this function works.
+ *
+ * Results:
+ *	Returns 1 to indicate that we've handled the error
+ *	locally.
+ *
+ * Side effects:
+ *	Sets errno based on what's in xPtr.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+matherr(xPtr)
+    struct exception *xPtr;	/* Describes error that occurred. */
+{
+    if (!tcl_MathInProgress) {
+	return 0;
+    }
+    if ((xPtr->type == DOMAIN) || (xPtr->type == SING)) {
+	errno = EDOM;
+    } else {
+	errno = ERANGE;
+    }
+    return 1;
+}