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Subject:	Re: GCC-6.4 sys/select.h build failures with std=c++14
To:	cygwin AT cygwin DOT com
References:	<CAHBhQykTn7Y2rPVtAQSaVu+1J8ytSDAAcT-Su5e_oABEVNmtrA AT mail DOT gmail DOT com>
From:	Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Message-ID:	<5cacbf9c-26d0-da8b-0aa8-ad5ec50bea2d@gmail.com>
Date:	Tue, 26 Sep 2017 07:32:47 +0200
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On 26/09/2017 03:41, Ian Fette wrote:
> I tried compiling a very simple program with curl using -std=c++14 under
> 64-bit cygwin with gcc 6.4.0. When compiling with just g++ main.cpp -lcurl
> everything is fine, however if I try to use c++14 as the dialect (g++
> main.cpp -lcurl -std=c++14) familiar problems creep up
> 
> In file included from /usr/include/curl/curl.h:2547:0,
>                   from main.cpp:10:
> /usr/include/curl/multi.h:155:40: error: ‘fd_set’ has not been declared
>                                          fd_set *read_fd_set,
>                                          ^~~~~~
> /usr/include/curl/multi.h:156:40: error: ‘fd_set’ has not been declared
>                                          fd_set *write_fd_set,
>                                          ^~~~~~
> /usr/include/curl/multi.h:157:40: error: ‘fd_set’ has not been declared
>                                          fd_set *exc_fd_set,
>                                          ^~~~~~
> 
> 
> This is resolved by manually including <sys/select.h> before including
> <curl/curl.h>
> 

this seems more an issue of curl header as from
http://pubs.opengroup.org/onlinepubs/009696899/basedefs/sys/select.h.html

"The <sys/select.h> header shall define the fd_set type as a structure."

so if they are using it, they should have a proper include

Marco


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