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duphandle: use ares_dup()

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curl_easy_duphandle() was not properly duping the ares channel. The
ares_dup() function was introduced in c-ares 1.6.0 so by starting to use
this function we also raise the bar and require c-ares >= 1.6.0
(released Dec 9, 2008) for such builds.

Reported by: Ning Dong
Bug: http://curl.haxx.se/mail/lib-2010-08/0318.html
This commit is contained in:
Daniel Stenberg 2010-09-21 16:41:14 +02:00
parent 70a025f3df
commit 19f45eaa79
3 changed files with 5 additions and 3 deletions
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1
m4/curl-confopts.m4
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@ -472,6 +472,7 @@ AC_DEFUN([CURL_CHECK_LIB_ARES], [
ares_channel channel;
ares_cancel(channel); /* added in 1.2.0 */
ares_process_fd(channel, 0, 0); /* added in 1.4.0 */
ares_dup(&channel, channel); /* added in 1.6.0 */
]])
],[
AC_MSG_RESULT([yes])