[Asterisk-code-review] configure: fix detection of re-entrant resolver functions (asterisk[18])

[Fabrice Fontaine]

Attention is currently required from: Bernd Kuhls.

Hello Bernd Kuhls,

I'd like you to do a code review.
Please visit

    https://gerrit.asterisk.org/c/asterisk/+/19964

to review the following change.


Change subject: configure: fix detection of re-entrant resolver functions
......................................................................

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 at 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 at gmail.com>
Change-Id: I79296f19e28ec764bbd1e991bf11c416d0b10563
---
M configure.ac
1 file changed, 26 insertions(+), 1 deletion(-)



  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/64/19964/1

diff --git a/configure.ac b/configure.ac
index 5aca252..3231450 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1494,7 +1494,11 @@
 			#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)

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Gerrit-Project: asterisk
Gerrit-Branch: 18
Gerrit-Change-Id: I79296f19e28ec764bbd1e991bf11c416d0b10563
Gerrit-Change-Number: 19964
Gerrit-PatchSet: 1
Gerrit-Owner: Fabrice Fontaine <fontaine.fabrice at gmail.com>
Gerrit-Reviewer: Bernd Kuhls <bernd.kuhls at t-online.de>
Gerrit-Attention: Bernd Kuhls <bernd.kuhls at t-online.de>
Gerrit-MessageType: newchange
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