From cca192e58f9ed7c4b33c1c991f69ff830c58b38f Mon Sep 17 00:00:00 2001
From: Paul Howarth <paul@city-fan.org>
Date: Fri, 16 Apr 2010 15:09:32 +0200
Subject: [PATCH] configure: GSSAPI detection on ancient Linux distros

On some ancient distributions such as RHEL-3, <gssapi/gssapi_krb5.h> needs
to be processed after <gssapi/gssapi.h>, but does not include it itself.
This patch checks for <gssapi/gssapi.h> first and then includes it
in the test for <gssapi/gssapi_krb5.h>, resolving the problem.

Without the patch, <gssapi/gssapi_krb5.h> is "present but cannot be
compiled".
---
 configure.ac | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 2d394e153..5dfa83ef4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1137,10 +1137,17 @@ if test x"$want_gss" = xyes; then
     ],
     [
       dnl not found, check Heimdal or MIT
+      AC_CHECK_HEADERS([gssapi/gssapi.h], [], [not_mit=1])
       AC_CHECK_HEADERS(
-        [gssapi/gssapi.h gssapi/gssapi_generic.h gssapi/gssapi_krb5.h],
+        [gssapi/gssapi_generic.h gssapi/gssapi_krb5.h],
         [],
-        [not_mit=1])
+        [not_mit=1],
+        [
+AC_INCLUDES_DEFAULT
+#ifdef HAVE_GSSAPI_GSSAPI_H
+#include <gssapi/gssapi.h>
+#endif
+        ])
       if test "x$not_mit" = "x1"; then
         dnl MIT not found, check for Heimdal
         AC_CHECK_HEADER(gssapi.h,