Add an autoconf check for res_init().

diff --git a/configure.ac b/configure.ac
index 1a5113f..000c7cf 100644 (file)
--- 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 392aa7a..fd79fdc 100644 (file)
--- 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)