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

diff --git a/configure b/configure
index e155e245616e2c42845f640704337ab2da667216..2d32e1ce6d3e3aad63ed3c9cdb24e4c0b568434d 100755 (executable)
--- a/configure
+++ b/configure
@@ -19270,7 +19270,11 @@ 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 a4c4ce2dc6fd139c8f7f9187faf19a340d618d4b..45d058947e5fe4f53de788b4eadebbf6ce1e0d3f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1485,7 +1485,11 @@ 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)