1.I had build c-ares and rebuild libcurl, and it worked.
2.i meet something odd.
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i write a cpp , you can build it using:
build:g++ -g -Wall -o get tttt.cpp -lcurl
when i run ./get
it show following :
>./get //enter
www.microsoft.com
 Collapse | Copy
Code<http://www.codeproject.com/Questions/488991/usingplusc-aresplusandpluslibcurl#>

url:www.microsoft.com
multi_socket_cb--------------------------------------------------------------(nil)
---->>>>EPOLLIN(nil)
duration: 748

//-----------> stop at this,and when you input somthing, it continue to run.
//why ? it so wire..., i need to do some ??

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