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[Bug-wget] HAVE_CARES on Windows

From: Gisle Vanem
Subject: [Bug-wget] HAVE_CARES on Windows
Date: Sat, 9 Apr 2016 21:58:18 +0200
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

I have tried building latest Wget with '-DHAVE_LIBCARES'
and all resolve attempts failed due to Gnulib's select()
is not compatible with the socket-number(s) returned from
a normal C-ares library on Windows.

This is what I did to fix it:

--- a/host.c 2016-04-09 17:45:44
+++ b/host.c 2016-04-09 21:48:06
@@ -694,6 +694,13 @@
   return al;

+/* Since GnuLib's select() (i.e. rpl_select()) cannot handle socket-numbers
+ * returned from C-ares, we must use the original select() from Winsock.
+ */
+#ifdef WINDOWS
+#undef select
 static void
 wait_ares (ares_channel channel)


So with a command like 'wget --dns-servers= www.vg.no'
all is well.

But it seems strange to me that w/o the '--dns-servers' option
it falls back to good old 'gethostbyname_with_timeout_callback()'
method. Shouldn't the use of C-ares's wait_ares() be default w/o
this option? I must be missing something.


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