https://gitlab.freedesktop.org/realmd/adcli/-/commit/e841ba7513f3f8b6393183d2dea9adcbf7ba2e44
https://bugs.gentoo.org/820224

From: Sumit Bose <sbose@redhat.com>
Date: Wed, 28 Jul 2021 12:55:16 +0200
Subject: [PATCH] configure: check for ns_get16 and ns_get32 as well

With newer versions of glibc res_query() might ba already available in
glibc with ns_get16() and ns_get32() still requires libresolv.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1984891
--- a/configure.ac
+++ b/configure.ac
@@ -98,13 +98,15 @@ AC_SUBST(LDAP_CFLAGS)
 # -------------------------------------------------------------------
 # resolv
 
-AC_MSG_CHECKING(for which library has res_query)
+AC_MSG_CHECKING([for which library has res_query, ns_get16 and ns_get32])
 for lib in "" "-lresolv"; do
 	saved_LIBS="$LIBS"
 	LIBS="$LIBS $lib"
 	AC_LINK_IFELSE([
 		AC_LANG_PROGRAM([#include <resolv.h>],
-		                [res_query (0, 0, 0, 0, 0)])
+		                [res_query (0, 0, 0, 0, 0);
+		                 ns_get32 (NULL);
+		                 ns_get16 (NULL);])
 	],
 	[ AC_MSG_RESULT(${lib:-libc}); have_res_query="yes"; break; ],
 	[ LIBS="$saved_LIBS" ])
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