detect NetBSD's res_ninit.


(christos)

$NetBSD: patch-configure,v 1.1 2014/12/05 16:00:23 christos Exp $
Search also for __res_ninit on NetBSD because of namespace protection

--- configure.orig	2014-12-05 10:53:31.000000000 -0500
+++ configure	2014-12-05 10:54:50.000000000 -0500
@@ -12969,6 +12969,64 @@
 
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing __res_ninit" >&5
+$as_echo_n "checking for library containing __res_ninit... " >&6; }
+if ${ac_cv_search___res_ninit+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char __res_ninit ();
+int
+main ()
+{
+return __res_ninit ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' resolv; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search___res_ninit=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search___res_ninit+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search___res_ninit+:} false; then :
+
+else
+  ac_cv_search___res_ninit=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search___res_ninit" >&5
+$as_echo "$ac_cv_search___res_ninit" >&6; }
+ac_res=$ac_cv_search___res_ninit
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+$as_echo "#define HAVE_RES_NINIT 1" >>confdefs.h
+
+fi
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for idn_free in -lidn" >&5
 $as_echo_n "checking for idn_free in -lidn... " >&6; }
 if ${ac_cv_lib_idn_idn_free+:} false; then :

$NetBSD: patch-configure.ac,v 1.1 2014/12/05 16:00:23 christos Exp $
Search also for __res_ninit on NetBSD because of namespace protection

--- configure.ac.orig	2014-12-05 10:53:36.000000000 -0500
+++ configure.ac	2014-12-05 10:53:51.000000000 -0500
@@ -126,6 +126,9 @@
 AC_SEARCH_LIBS(res_ninit, resolv,
 	AC_DEFINE(HAVE_RES_NINIT, 1,
 	[Define to 1 if you have the `res_ninit()' function.]))
+AC_SEARCH_LIBS(__res_ninit, resolv,
+	AC_DEFINE(HAVE_RES_NINIT, 1,
+	[Define to 1 if you have the `res_ninit()' function.]))
 AC_CHECK_LIB(idn, idn_free)
 AC_CHECK_LIB(rt, nanosleep)
 AC_SEARCH_LIBS(inet_addr, nsl)