From ca1c2a0bac6e3ceab5c232ab800a1085db346144 Mon Sep 17 00:00:00 2001
From: Ben Lindstrom <mouring@eviladmin.org>
Date: Sat, 14 Oct 2000 21:33:19 +0000
Subject: [PATCH] Add support for GNU rx library for those lacking regexp
 support

---
 ChangeLog    | 1 +
 INSTALL      | 7 +++++++
 TODO         | 2 --
 acconfig.h   | 3 +++
 compat.c     | 6 +++++-
 configure.in | 1 +
 6 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index c7099dc27..bbd97b950 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,5 @@
 20001014
+ - (bal) Add support for GNU rx library for those lacking regexp support 
  - (djm) Don't accept PAM_PROMPT_ECHO_ON messages during initial auth
  - (djm) Revert SSH2 serverloop hack, will find a better way.
  - (djm) Add workaround for Linux 2.4's gratuitious errno change. Patch
diff --git a/INSTALL b/INSTALL
index 4824ada63..b201eccd5 100644
--- a/INSTALL
+++ b/INSTALL
@@ -40,6 +40,13 @@ ftp://ftp.gnu.org/gnu/make/
 OpenSSH has only been tested with GNU make. It may work with other
 'make' programs, but you are on your own.
 
+GNU rx:
+ftp:://ftp.gnu.org/gnu/rx/
+
+Most platforms do not required this.  However older 4.3 BSD do not
+have a posix regex library. 
+
+
 2. Building / Installation
 --------------------------
 
diff --git a/TODO b/TODO
index 93d8998b2..d32c5d5b0 100644
--- a/TODO
+++ b/TODO
@@ -9,6 +9,4 @@
 
 - Cleanup configure.in
 
-- utmp/wtmp logging does not work on NeXT
-
 - Complete Tru64 SIA support
diff --git a/acconfig.h b/acconfig.h
index a17cba825..3bf61ec92 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -52,6 +52,9 @@
 /* Define if you are on Cygwin */
 #undef HAVE_CYGWIN
 
+/* Define if you lack native POSIX regex and you are using GNU rx library */
+#undef HAVE_LIBRX
+
 /* Define if you are on NeXT */
 #undef HAVE_NEXT
 
diff --git a/compat.c b/compat.c
index 19dc76d96..71d12010c 100644
--- a/compat.c
+++ b/compat.c
@@ -29,7 +29,11 @@ RCSID("$OpenBSD: compat.c,v 1.24 2000/10/10 20:20:45 markus Exp $");
 #include "packet.h"
 #include "xmalloc.h"
 #include "compat.h"
-#include <regex.h>
+#ifdef HAVE_LIBRX
+#  include <rxposix.h>
+#else /* Use native regex libraries */
+#  include <regex.h>
+#endif /* HAVE_LIBRX */
 
 int compat13 = 0;
 int compat20 = 0;
diff --git a/configure.in b/configure.in
index 7ff324bb0..a6bed7508 100644
--- a/configure.in
+++ b/configure.in
@@ -256,6 +256,7 @@ AC_ARG_WITH(libs,
 # Checks for libraries.
 AC_CHECK_LIB(z, deflate, ,AC_MSG_ERROR([*** zlib missing - please install first ***]))
 AC_CHECK_LIB(util, login, AC_DEFINE(HAVE_LIBUTIL_LOGIN) LIBS="$LIBS -lutil")
+AC_CHECK_LIB(rx, regcomp, AC_DEFINE(HAVE_LIBRX) LIBS="$LIBS -lrx")
 
 if test -z "$no_libsocket" ; then
 	AC_CHECK_LIB(nsl, yp_match, , )