I thought it was the Cygwin GCC.

How do I check?


________________________________
From: Eliot Moss <moss@cs.umass.edu>
Sent: Tuesday, February 7, 2023 9:54:33 AM
To: Yeo Kai Wei <yeokaiwei@hotmail.com>; gs-cygwin.com@gluelogic.com <gs-cygwin.com@gluelogic.com>
Cc: cygwin@cygwin.com <cygwin@cygwin.com>
Subject: Re: [FEEDBACK] Issue with fd_set, FD_ZERO, FD_SET, FD_SETSIZE : Cygwin

On 2/7/2023 11:34 AM, Yeo Kai Wei wrote:
>
> On 7/2/2023 7:27 am, Eliot Moss wrote:
>> On 2/7/2023 10:03 AM, Yeo Kai Wei via Cygwin wrote:
>>>
>>> On 7/2/2023 4:59 am, gs-cygwin.com@gluelogic.com wrote:
>>>> On Tue, Feb 07, 2023 at 04:33:53AM +0800, Yeo Kai Wei wrote:
>>
>>> I updated Cygwin to 3.4.5-1.x86_64.
>>>
>>> $ uname -a
>>> CYGWIN_NT-10.0-19045 DESKTOP-P3E71RB 3.4.5-1.x86_64 2023-01-19 19:09 UTC x86_64 Cygwin
>>>
>>>
>>> However, the same problem occurs.
>>>
>>> Cygwn-devel doesn't seem to work.
>>>
>>> $ gcc -o selectStdIn selectStdIn.c
>>> selectStdIn.c:9:10: fatal error: sys/select.h: No such file or directory
>>>   #include <sys/select.h>
>>>            ^~~~~~~~~~~~~~
>>> compilation terminated.
>>
>> Well, on my system cygcheck -f /usr/include/sys/select.h clearly says
>> that the file came from cygwin-devel-3.4.3-1.  Maybe you misspelled
>> cygwin-devel ?  You do have to select the package explicitly, too.
>>
>> EM
>
>
> Hi Eliot,
>
> I just reinstalled Cygwin but I'm unsure of what I missed.
>
> I did "cygcheck -f /usr/include/sys/select.h" and it seems to tell me that I do have
> cygwin-devel-3.4.5-1
>
> Did I miss a step?

What gcc are you running?  Maybe not cygwin's?

EM