From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Wed, 8 Mar 2023 18:26:51 +0000 (+0100)
Subject: configure: fix detection of re-entrant resolver functions
X-Git-Tag: 18.18.0-rc1~36
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a6c146c4e62b18f901a5fb80b11eb8a28e1891a;p=thirdparty%2Fasterisk.git

configure: fix detection of re-entrant resolver functions

uClibc does not provide res_nsearch:
asterisk-16.0.0/main/dns.c:506: undefined reference to `res_nsearch'

Patch coded by Yann E. MORIN:
http://lists.busybox.net/pipermail/buildroot/2018-October/232630.html

ASTERISK-21795 #close

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[Retrieved from:
https: //git.buildroot.net/buildroot/tree/package/asterisk/0005-configure-fix-detection-of-re-entrant-resolver-funct.patch]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Change-Id: I79296f19e28ec764bbd1e991bf11c416d0b10563
(cherry picked from commit a10b4f5d2c85a7f6c1fbe5e942fec1eea60cff47)
---

diff --git a/configure b/configure
index 62c340a78b..34598191f0 100755
--- a/configure
+++ b/configure
@@ -19663,7 +19663,11 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 int
 main ()
 {
-int foo = res_ninit(NULL);
+
+				int foo;
+				foo = res_ninit(NULL);
+				foo = res_nsearch(NULL, NULL, 0, 0, NULL, 0);
+
   ;
   return 0;
 }
diff --git a/configure.ac b/configure.ac
index 5aca25269b..3231450d3a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1494,7 +1494,11 @@ AC_LINK_IFELSE(
 			#include <arpa/nameser.h>
 			#endif
 			#include <resolv.h>],
-			[int foo = res_ninit(NULL);])],
+			[
+				int foo;
+				foo = res_ninit(NULL);
+				foo = res_nsearch(NULL, NULL, 0, 0, NULL, 0);
+			])],
 	AC_MSG_RESULT(yes)
 	AC_DEFINE([HAVE_RES_NINIT], 1, [Define to 1 if your system has the re-entrant resolver functions.])
 	AC_SEARCH_LIBS(res_9_ndestroy, resolv)