[PATCH] Core: guard use of AI_ADDRCONFIG

[Piotr Sikora]

# HG changeset patch
# User Piotr Sikora <piotr at cloudflare.com>
# Date 1375688648 0
#      Mon Aug 05 07:44:08 2013 +0000
# Node ID c9e0a2f54810335ba91b86fdb92ef63571680dae
# Parent  ec8594b9bf11de3599af15de8e73e41bf7a8b42c
Core: guard use of AI_ADDRCONFIG.

AI_ADDRCONFIG is not available on all operating systems (e.g. OpenBSD)
and using it without a guard results in dropped getaddrinfo() support.

Signed-off-by: Piotr Sikora <piotr at cloudflare.com>

diff -r ec8594b9bf11 -r c9e0a2f54810 auto/unix
--- a/auto/unix Mon Aug 05 10:55:59 2013 +0400
+++ b/auto/unix Mon Aug 05 07:44:08 2013 +0000
@@ -791,7 +791,9 @@ ngx_feature_libs=
 ngx_feature_test='struct addrinfo hints, *res;
                   hints.ai_family = AF_UNSPEC;
                   hints.ai_socktype = SOCK_STREAM;
+                  #ifdef AI_ADDRCONFIG
                   hints.ai_flags = AI_ADDRCONFIG;
+                  #endif
                   if (getaddrinfo("localhost", NULL, &hints, &res) != 0)
                       return 1;
                   freeaddrinfo(res)'
diff -r ec8594b9bf11 -r c9e0a2f54810 src/core/ngx_inet.c
--- a/src/core/ngx_inet.c       Mon Aug 05 10:55:59 2013 +0400
+++ b/src/core/ngx_inet.c       Mon Aug 05 07:44:08 2013 +0000
@@ -963,7 +963,9 @@ ngx_inet_resolve_host(ngx_pool_t *pool,
     ngx_memzero(&hints, sizeof(struct addrinfo));
     hints.ai_family = AF_UNSPEC;
     hints.ai_socktype = SOCK_STREAM;
+#ifdef AI_ADDRCONFIG
     hints.ai_flags = AI_ADDRCONFIG;
+#endif

     if (getaddrinfo((char *) host, NULL, &hints, &res) != 0) {
         u->err = "host not found";