diff --git a/configure.ac b/configure.ac
index 600155c..bbc00e7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.142 2003/08/25 03:27:40 dtucker Exp $
+# $Id: configure.ac,v 1.143 2003/08/26 01:58:16 dtucker Exp $
 
 AC_INIT
 AC_CONFIG_SRCDIR([ssh.c])
@@ -831,6 +831,7 @@
 			AC_CHECK_LIB(dl, dlopen, , )
 			AC_CHECK_LIB(pam, pam_set_item, , AC_MSG_ERROR([*** libpam missing]))
 			AC_CHECK_FUNCS(pam_getenvlist)
+			AC_CHECK_FUNCS(pam_putenv)
 
 			disable_shadow=yes
 			PAM_MSG="yes"
@@ -1946,6 +1947,31 @@
                         fi
 			AC_SEARCH_LIBS(dn_expand, resolv)
 
+			AC_CHECK_LIB(gssapi,gss_init_sec_context,
+				[ AC_DEFINE(GSSAPI)
+				  K5LIBS="-lgssapi $K5LIBS" ],
+				[ AC_CHECK_LIB(gssapi_krb5,gss_init_sec_context,
+					[ AC_DEFINE(GSSAPI)
+				  	  K5LIBS="-lgssapi_krb5 $K5LIBS" ],
+					AC_MSG_WARN([Cannot find any suitable gss-api library - build may fail]),
+					$K5LIBS)
+				],
+				$K5LIBS)
+			
+			AC_CHECK_HEADER(gssapi.h, ,
+				[ unset ac_cv_header_gssapi_h
+				  CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include/gssapi" 
+				  AC_CHECK_HEADERS(gssapi.h, ,
+					AC_MSG_WARN([Cannot find any suitable gss-api header - build may fail])
+				  ) 
+				]
+			)
+
+			oldCPP="$CPPFLAGS"
+			CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include/gssapi"
+			AC_CHECK_HEADER(gssapi_krb5.h, ,
+					[ CPPFLAGS="$oldCPP" ])
+
                         KRB5=yes
                 fi
         ]