From 733190413f6aeffdedf48b85bf43bcfd1038d54b Mon Sep 17 00:00:00 2001
From: Marcel Raad <Marcel.Raad@teamviewer.com>
Date: Thu, 26 Oct 2017 20:52:22 +0200
Subject: [PATCH] resolvers: only include anything if needed

This avoids warnings about unused stuff.

Closes https://github.com/curl/curl/pull/2023
---
 lib/asyn-ares.c | 16 ++++++++--------
 lib/hostasyn.c  | 10 +++++-----
 lib/hostip4.c   |  9 +++++----
 lib/hostip6.c   | 10 +++++-----
 lib/hostsyn.c   | 10 +++++-----
 5 files changed, 28 insertions(+), 27 deletions(-)

diff --git a/lib/asyn-ares.c b/lib/asyn-ares.c
index 27523041e..dd7dc4028 100644
--- a/lib/asyn-ares.c
+++ b/lib/asyn-ares.c
@@ -22,6 +22,14 @@
 
 #include "curl_setup.h"
 
+/***********************************************************************
+ * Only for ares-enabled builds
+ * And only for functions that fulfill the asynch resolver backend API
+ * as defined in asyn.h, nothing else belongs in this file!
+ **********************************************************************/
+
+#ifdef CURLRES_ARES
+
 #ifdef HAVE_LIMITS_H
 #include <limits.h>
 #endif
@@ -48,14 +56,6 @@
 #define in_addr_t unsigned long
 #endif
 
-/***********************************************************************
- * Only for ares-enabled builds
- * And only for functions that fulfill the asynch resolver backend API
- * as defined in asyn.h, nothing else belongs in this file!
- **********************************************************************/
-
-#ifdef CURLRES_ARES
-
 #include "urldata.h"
 #include "sendf.h"
 #include "hostip.h"
diff --git a/lib/hostasyn.c b/lib/hostasyn.c
index 28bdf7a48..7b6e8568a 100644
--- a/lib/hostasyn.c
+++ b/lib/hostasyn.c
@@ -22,6 +22,11 @@
 
 #include "curl_setup.h"
 
+/***********************************************************************
+ * Only for builds using asynchronous name resolves
+ **********************************************************************/
+#ifdef CURLRES_ASYNCH
+
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif
@@ -51,11 +56,6 @@
 /* The last #include file should be: */
 #include "memdebug.h"
 
-/***********************************************************************
- * Only for builds using asynchronous name resolves
- **********************************************************************/
-#ifdef CURLRES_ASYNCH
-
 /*
  * Curl_addrinfo_callback() gets called by ares, gethostbyname_thread()
  * or getaddrinfo_thread() when we got the name resolved (or not!).
diff --git a/lib/hostip4.c b/lib/hostip4.c
index 6a7c6e576..9d6f115ae 100644
--- a/lib/hostip4.c
+++ b/lib/hostip4.c
@@ -22,6 +22,11 @@
 
 #include "curl_setup.h"
 
+/***********************************************************************
+ * Only for plain IPv4 builds
+ **********************************************************************/
+#ifdef CURLRES_IPV4 /* plain IPv4 code coming up */
+
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif
@@ -53,10 +58,6 @@
 #include "curl_memory.h"
 #include "memdebug.h"
 
-/***********************************************************************
- * Only for plain IPv4 builds
- **********************************************************************/
-#ifdef CURLRES_IPV4 /* plain IPv4 code coming up */
 /*
  * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
  * been set and returns TRUE if they are OK.
diff --git a/lib/hostip6.c b/lib/hostip6.c
index edeebec9e..7c9988f41 100644
--- a/lib/hostip6.c
+++ b/lib/hostip6.c
@@ -22,6 +22,11 @@
 
 #include "curl_setup.h"
 
+/***********************************************************************
+ * Only for IPv6-enabled builds
+ **********************************************************************/
+#ifdef CURLRES_IPV6
+
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif
@@ -54,11 +59,6 @@
 #include "curl_memory.h"
 #include "memdebug.h"
 
-/***********************************************************************
- * Only for IPv6-enabled builds
- **********************************************************************/
-#ifdef CURLRES_IPV6
-
 #if defined(CURLDEBUG) && defined(HAVE_GETNAMEINFO)
 /* These are strictly for memory tracing and are using the same style as the
  * family otherwise present in memdebug.c. I put these ones here since they
diff --git a/lib/hostsyn.c b/lib/hostsyn.c
index 1a95263c6..3de6746f5 100644
--- a/lib/hostsyn.c
+++ b/lib/hostsyn.c
@@ -22,6 +22,11 @@
 
 #include "curl_setup.h"
 
+/***********************************************************************
+ * Only for builds using synchronous name resolves
+ **********************************************************************/
+#ifdef CURLRES_SYNCH
+
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif
@@ -51,11 +56,6 @@
 /* The last #include file should be: */
 #include "memdebug.h"
 
-/***********************************************************************
- * Only for builds using synchronous name resolves
- **********************************************************************/
-#ifdef CURLRES_SYNCH
-
 /*
  * Function provided by the resolver backend to set DNS servers to use.
  */