Declare h_errno if no declaration provided (HP-UX).

ChangeLog

@@ -1,3 +1,8 @@
+2009-06-12  Micah Cowan  <micah@cowan.name>
+
+	* configure.ac: Check for h_errno declaration. Idea thanks to
+	Maciej W. Rozycki.
+
 2009-03-03  Steven Schubiger  <stsc@member.fsf.org>
 
 	* src/ftp.c, src/http.c, src/main.c, src/recur.h,

configure.ac

@@ -163,6 +163,8 @@ AC_CHECK_HEADERS(unistd.h sys/time.h)
 AC_CHECK_HEADERS(termios.h sys/ioctl.h sys/select.h utime.h sys/utime.h)
 AC_CHECK_HEADERS(stdint.h inttypes.h pwd.h wchar.h)
 
+AC_CHECK_DECLS(h_errno,,,[#include <netdb.h>])
+
 dnl
 dnl Check sizes of integer types.  These are used to find n-bit
 dnl integral types on older systems that fail to provide intN_t and

src/ChangeLog

@@ -1,3 +1,8 @@
+2009-06-12  Micah Cowan  <micah@cowan.name>
+
+	* host.c: Declare h_errno if no declaration is provided. Idea
+	thanks to Maciej W. Rozycki.
+
 2009-06-11  Xin Zou  <zouxin2008@gmail.com>	
 	
 	* http.c (gethttp): Fix some memory leaks.

src/host.c

@@ -58,6 +58,11 @@ as that of the covered work.  */
 # define NO_ADDRESS NO_DATA
 #endif
 
+#if !HAVE_DECL_H_ERRNO
+extern int h_errno;
+#endif
+
+
 /* Lists of IP addresses that result from running DNS queries.  See
    lookup_host for details.  */