commit ca3d65ff69d5187cb4d6b7f81d414427c7007e22
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon Jun 19 13:15:11 2017 +0200

    resolv: Make __res_vinit hidden
    
    And remove unnecessary separate declarations.

diff --git a/include/resolv.h b/include/resolv.h
index e8f477cd86b7be11..37e4047ac40c6ae1 100644
--- a/include/resolv.h
+++ b/include/resolv.h
@@ -23,7 +23,7 @@ extern __thread struct __res_state *__resp attribute_tls_model_ie;
 # define _res (*__resp)
 
 /* Now define the internal interfaces.  */
-extern int __res_vinit (res_state, int);
+extern int __res_vinit (res_state, int) attribute_hidden;
 extern int __res_maybe_init (res_state, int);
 extern void _sethtent (int);
 extern struct hostent *_gethtent (void);
diff --git a/resolv/res_init.c b/resolv/res_init.c
index 23676e994dd58be7..57223b470af9ba4d 100644
--- a/resolv/res_init.c
+++ b/resolv/res_init.c
@@ -110,8 +110,6 @@ unsigned long long int __res_initstamp attribute_hidden;
  */
 int
 res_ninit(res_state statp) {
-	extern int __res_vinit(res_state, int);
-
 	return (__res_vinit(statp, 0));
 }
 libc_hidden_def (__res_ninit)
diff --git a/resolv/res_libc.c b/resolv/res_libc.c
index c52574f895d4f19d..3ef885762e890a40 100644
--- a/resolv/res_libc.c
+++ b/resolv/res_libc.c
@@ -41,8 +41,6 @@ __libc_lock_define_initialized (static, lock);
 
 int
 res_init(void) {
-	extern int __res_vinit(res_state, int);
-
 	/*
 	 * These three fields used to be statically initialized.  This made
 	 * it hard to use this code in a shared library.  It is necessary,