1From 9b4070944578336506cd0a76de6f733c72d0ca74 Mon Sep 17 00:00:00 2001
2From: "Yann E. MORIN" <yann.morin.1998@free.fr>
3Date: Sat, 13 Oct 2018 11:11:15 +0200
4Subject: [PATCH] configure: fix detection of re-entrant resolver functions
5
6Fixes https://issues.asterisk.org/jira/browse/ASTERISK-21795
7
8uClibc does not provide res_nsearch:
9asterisk-16.0.0/main/dns.c:506: undefined reference to `res_nsearch'
10
11Patch coded by Yann E. MORIN:
12http://lists.busybox.net/pipermail/buildroot/2018-October/232630.html
13
14Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
15---
16 configure.ac | 6 +++++-
17 1 file changed, 5 insertions(+), 1 deletion(-)
18
19diff --git a/configure.ac b/configure.ac
20index dd0c8edd13..ee1ca9ceb6 100644
21--- a/configure.ac
22+++ b/configure.ac
23@@ -1388,7 +1388,11 @@ AC_LINK_IFELSE(
24 			#include <arpa/nameser.h>
25 			#endif
26 			#include <resolv.h>],
27-			[int foo = res_ninit(NULL);])],
28+			[
29+				int foo;
30+				foo = res_ninit(NULL);
31+				foo = res_nsearch(NULL, NULL, 0, 0, NULL, 0);
32+			])],
33 	AC_MSG_RESULT(yes)
34 	AC_DEFINE([HAVE_RES_NINIT], 1, [Define to 1 if your system has the re-entrant resolver functions.])
35 	AC_SEARCH_LIBS(res_9_ndestroy, resolv)
36--
372.19.1
38
39