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Date: Tue, 7 Feb 2023 11:56:39 +0800
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Subject: Re: [FEEDBACK] Issue with fd_set, FD_ZERO, FD_SET, FD_SETSIZE : Cygwin
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From: Yeo Kai Wei via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Yeo Kai Wei <yeokaiwei AT hotmail DOT com>
Errors-To: cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com
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On 7/2/2023 9:54 am, Eliot Moss wrote:
> 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 DOT com AT gluelogic DOT 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

Hi Eliot,

I used "cygcheck -cd" to show all the packages I have.

I can see "cygwin-devel         3.4.5-1".


$ cygcheck -cd
Cygwin Package Information
Package              Version
_autorebase          001091-1
alternatives         1.3.30c-10
base-cygwin          3.8-2
base-files           4.3-3
bash                 4.4.12-3
bzip2                1.0.8-1
ca-certificates      2022.2.54-3
coreutils            9.0-1
crypto-policies      20190218-1
cygutils             1.4.17-1
cygwin               3.4.5-1
cygwin-devel         3.4.5-1
dash                 0.5.12-1
diffutils            3.9-1
editrights           1.03-1
file                 5.44-1
findutils            4.9.0-1
gawk                 5.2.1-2
getent               2.18.90-5
grep                 3.8-2
groff                1.22.4-1
gzip                 1.12-1
hostname             3.13-1
info                 7.0.2-1
ipc-utils            1.0-2
less                 590-1
libargp              20110921-3
libattr1             2.5.1-1.20.g0981a7bfe487
libblkid1            2.33.1-2
libbz2_1             1.0.8-1
libfdisk1            2.33.1-2
libffi6              3.2.1-2
libgcc1              11.3.0-1
libgdbm6             1.18.1-1
libgmp10             6.2.1-2
libiconv2            1.17-1
libintl8             0.21.1-2
liblz4_1             1.9.4-1
liblzma5             5.4.1-1
libmpfr6             4.2.0-1
libncursesw10        6.3-1.20220416
libp11-kit0          0.23.20-1
libpcre2_8_0         10.42-1
libpipeline1         1.5.6-1
libpopt-common       1.18-1
libpopt0             1.18-1
libreadline7         8.2-2
libsigsegv2          2.10-2
libsmartcols1        2.33.1-2
libssl1.1            1.1.1s-1
libstdc++6           11.3.0-1
libtasn1_6           4.14-1
libuuid1             2.33.1-2
libzstd1             1.5.2-1
login                1.13-1
man-db               2.11.2-1
mintty               3.6.3-1
ncurses              6.3-1.20220416
openssl              1.1.1s-1
p11-kit              0.23.20-1
p11-kit-trust        0.23.20-1
rebase               4.6.2-2
run                  1.3.4-2
sed                  4.9-1
tar                  1.34-1
terminfo             6.3-1.20220416
terminfo-extra       6.3-1.20220416
tzcode               2022g-1
tzdata               2022g-1
util-linux           2.33.1-2
vim-minimal          8.2.4372-1
which                2.20-2
xz                   5.4.1-1
zlib0                1.2.13-1
zstd                 1.5.2-1


Additionally, what packages do I need to download for the following?


$ gcc -o basicFork basicFork.c
basicFork.c: In function 'main':
basicFork.c:14:9: error: 'SIGCHILD' undeclared (first use in this 
function); did
  you mean 'SIGILL'?
   signal(SIGCHILD, SIG_IGN);
          ^~~~~~~~
          SIGILL
basicFork.c:14:9: note: each undeclared identifier is reported only once 
for eac
h function it appears in
basicFork.c:19:14: warning: implicit declaration of function 'fork' 
[-Wimplicit-
function-declaration]
   pid_t pid = fork();



Thank you.


Kind Regards,

YEO Kai Wei




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