$NetBSD: patch-bg,v 1.3 2012/02/16 14:13:15 hans Exp $

--- tcl/tclCmdAH.c.orig	1995-02-24 16:19:53.000000000 -0500
+++ tcl/tclCmdAH.c	2008-12-16 20:18:00.000000000 -0500
@@ -38,9 +38,22 @@ static char rcsid[] = "$Header: /home/ag
 #include <sys/wait.h>
 #include "tclInt.h"
 
-extern int errno;
+#ifdef __NetBSD__
+#define unix
+#endif
+
+#if (defined(__unix__) || defined(unix)) && !defined(USG)
+#include <sys/param.h>
+#include <unistd.h>
+#include <fcntl.h>
+#endif
+
+#if !(defined(BSD) && BSD >= 199306)
 extern long lseek();
+#endif
+#ifndef BSD4_4
 extern char *mktemp();
+#endif
 
 /*
  *----------------------------------------------------------------------
@@ -430,7 +443,7 @@ Tcl_ExecCmd(dummy, interp, argc, argv)
     int pid = -1;			/* -1 means child process doesn't
 					 * exist (yet).  Non-zero gives its
 					 * id (0 only in child). */
-    union wait status;
+    int status;
     char *cmdName, *execName;
 
     /*
@@ -501,8 +514,13 @@ Tcl_ExecCmd(dummy, interp, argc, argv)
     } else {
 	char tmp[sizeof(TMP_FILE_NAME) + 1];
 	strcpy(tmp, TMP_FILE_NAME);
+#ifdef BSD4_4
+	mkstemp(tmp);
+	stdIn[0] = mkstemp(tmp);
+#else
 	mktemp(tmp);
 	stdIn[0] = open(tmp, O_RDWR|O_CREAT, 0);
+#endif
 	if (stdIn[0] < 0) {
 	    sprintf(interp->result,
 		    "couldn't create input file for \"%.50s\" command: %.50s",
@@ -642,7 +660,7 @@ Tcl_ExecCmd(dummy, interp, argc, argv)
 	    sprintf(interp->result, "command terminated abnormally");
 	    result = TCL_ERROR;
 	}
-	result = status.w_retcode;
+	result = WEXITSTATUS(status);
     }
     if (stdIn[0] != -1) {
 	close(stdIn[0]);