From: Guus Sliepen <guus@tinc-vpn.org>
Date: Fri, 25 Apr 2014 15:12:07 +0000 (+0200)
Subject: Add an autoconf check for res_init().
X-Git-Tag: release-1.0.24~14
X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=commitdiff_plain;h=745a5d0d3eae05f8aa94b7948ee4c796accbb09c

Add an autoconf check for res_init().
---

diff --git a/configure.ac b/configure.ac
index 1a5113fc..000c7cf6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -158,7 +158,7 @@ dnl Checks for header files.
 dnl We do this in multiple stages, because unlike Linux all the other operating systems really suck and don't include their own dependencies.
 
 AC_HEADER_STDC
-AC_CHECK_HEADERS([stdbool.h syslog.h sys/file.h sys/ioctl.h sys/mman.h sys/param.h sys/resource.h sys/socket.h sys/time.h time.h sys/uio.h sys/wait.h netdb.h arpa/inet.h dirent.h])
+AC_CHECK_HEADERS([stdbool.h syslog.h sys/file.h sys/ioctl.h sys/mman.h sys/param.h sys/resource.h sys/socket.h sys/time.h time.h sys/uio.h sys/wait.h netdb.h arpa/inet.h dirent.h resolv.h])
 AC_CHECK_HEADERS([net/if.h net/if_types.h linux/if_tun.h net/if_tun.h net/tun/if_tun.h net/if_tap.h net/tap/if_tap.h net/ethernet.h net/if_arp.h netinet/in_systm.h netinet/in.h netinet/in6.h netpacket/packet.h],
   [], [], [#include "src/have.h"]
 )
@@ -202,6 +202,11 @@ AC_CHECK_DECLS([freeaddrinfo, gai_strerror, getaddrinfo, getnameinfo],
   [], [], [#include "src/have.h"]
 )
 
+AC_CHECK_DECLS([res_init], [], [], [
+  #include <netinet/in.h>
+  #include <resolv.h>
+])
+
 AC_CACHE_SAVE
 
 dnl These are defined in files in m4/
diff --git a/src/net.c b/src/net.c
index 392aa7ac..fd79fdc7 100644
--- a/src/net.c
+++ b/src/net.c
@@ -40,7 +40,10 @@
 #include "route.h"
 #include "subnet.h"
 #include "xalloc.h"
-#include "resolv.h"
+
+#ifdef HAVE_RESOLV_H
+#include <resolv.h>
+#endif
 
 bool do_purge = false;
 volatile bool running = false;
@@ -495,7 +498,9 @@ int main_loop(void) {
 			avl_node_t *node;
 			logger(LOG_INFO, "Flushing event queue");
 			expire_events();
+#ifdef HAVE_DECL_RES_INIT
 			res_init();
+#endif
 			for(node = connection_tree->head; node; node = node->next) {
 				connection_t *c = node->data;
 				if(c->status.active)