From bed2aeff6eae4396094c4c9336b3e77397b16dc3 Mon Sep 17 00:00:00 2001
From: Tom Yu <tlyu@mit.edu>
Date: Wed, 15 Sep 2004 20:02:31 +0000
Subject: [PATCH] 	* configure.in: Check for h_errno declaration in
 netdb.h

	* port-sockets.h: Explicitly declare h_errno if it's missing.

ticket: 1044

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@16758 dc483132-0cff-0310-8789-dd5450dbe970
---
 src/include/ChangeLog      |  6 ++++++
 src/include/configure.in   | 13 +++++++++++++
 src/include/port-sockets.h |  4 ++++
 3 files changed, 23 insertions(+)

diff --git a/src/include/ChangeLog b/src/include/ChangeLog
index fce9d1a63..f87b1864c 100644
--- a/src/include/ChangeLog
+++ b/src/include/ChangeLog
@@ -1,3 +1,9 @@
+2004-09-15  Tom Yu  <tlyu@mit.edu>
+
+	* configure.in: Check for h_errno declaration in netdb.h.
+
+	* port-sockets.h: Explicitly declare h_errno if it's missing.
+
 2004-09-10  Tom Yu  <tlyu@mit.edu>
 
 	* port-sockets.h: Remove _XOPEN_SOURCE_EXTENDED hack for netdb.h,
diff --git a/src/include/configure.in b/src/include/configure.in
index b50c7e4ba..277f206ac 100644
--- a/src/include/configure.in
+++ b/src/include/configure.in
@@ -242,6 +242,19 @@ if test $krb5_cv_has_struct_lifconf = yes; then
 fi
 dnl
 dnl
+AC_MSG_CHECKING([for h_errno in netdb.h])
+AC_CACHE_VAL(krb5_cv_header_netdb_h_h_errno,
+[AC_TRY_COMPILE(
+	[#include <netdb.h>],
+	[int x = h_errno;], krb5_cv_header_netdb_h_h_errno=yes,
+	krb5_cv_header_netdb_h_h_errno=no)])
+AC_MSG_RESULT($krb5_cv_header_netdb_h_h_errno)
+if test $krb5_cv_header_netdb_h_h_errno = yes; then
+    AC_DEFINE([HAVE_NETDB_H_H_ERRNO], 1,
+	[Define if netdb.h declares h_errno])
+fi
+dnl
+dnl
 KRB5_AC_NEED_BIND_8_COMPAT
 dnl
 dnl
diff --git a/src/include/port-sockets.h b/src/include/port-sockets.h
index 3154c6179..5a8562dfc 100644
--- a/src/include/port-sockets.h
+++ b/src/include/port-sockets.h
@@ -77,6 +77,10 @@ typedef WSABUF sg_buf;
 #include <arpa/inet.h>		/* For inet_ntoa */
 #include <netdb.h>
 
+#ifndef HAVE_NETDB_H_H_ERRNO
+extern int h_errno;		/* In case it's missing, e.g., HP-UX 10.20. */
+#endif
+
 #include <sys/param.h>		/* For MAXHOSTNAMELEN */
 #include <sys/socket.h>		/* For SOCK_*, AF_*, etc */
 #include <sys/time.h>		/* For struct timeval */
-- 
2.26.2