Add check for hstrerror

configure.in

@@ -984,6 +984,8 @@ if test "$ol_enable_dnssrv" != no -a "$ol_link_dnssrv" = no ; then
 	AC_MSG_ERROR([DNSSRV requires res_query()])
 fi
 
+AC_CHECK_FUNCS( hstrerror )
+
 dnl ----------------------------------------------------------------
 dnl PF_INET6 support requires getaddrinfo and INET6_ADDRSTRLEN
 dnl PF_LOCAL may use getaddrinfo in available

include/portable.h.in

@@ -185,6 +185,9 @@
 /* Define if you have the gettimeofday function.  */
 #undef HAVE_GETTIMEOFDAY
 
+/* Define if you have the hstrerror function.  */
+#undef HAVE_HSTRERROR
+
 /* Define if you have the inet_ntop function.  */
 #undef HAVE_INET_NTOP
 
@@ -674,6 +677,12 @@
 /* define if you have winsock2 */
 #undef HAVE_WINSOCK2
 
+/* define if sys_errlist is not declared in stdio.h or errno.h */
+#undef DECL_SYS_ERRLIST
+
+/* define if you actually have sys_errlist in your libs */
+#undef HAVE_SYS_ERRLIST
+
 /* define if strerror_r returns char* instead of int */
 #undef HAVE_NONPOSIX_STRERROR_R