scons v4.3.0-1 outputs nothing on cygwin v2. 3.1

[Brian Inglis]

On 2022-05-15 11:10, Martin Ortuno wrote:
> Here the information you requested:
> $ ls -glo /usr/bin/python
> lrwxrwxrwx 1 13 Jun  3  2015 /usr/bin/python -> python2.7.exe
> $ alternatives --display python
> python - status is auto.
> link currently points to /usr/bin/python3.9
> /usr/bin/python3.9 - priority 39
> Current `best' version is /usr/bin/python3.9.

That makes no sense, your system is messed up:

"link currently points to /usr/bin/python3.9"

implies "/usr/bin/python -> python3.9"

but you have "/usr/bin/python -> python2.7.exe"!

To try to fix that, please try running:

	$ alternatives --verbose --auto python

and please report the output and where the links now go.


> El vie., 13 de mayo de 2022 5:47 p. m., Brian Inglis <
> Brian.Inglis@systematicsw.ab.ca> escribió:
> 
>> On 2022-05-13 16:16, Martin Ortuno wrote:
>>> El vie., 13 de mayo de 2022 5:12 p. m., William Deegan escribió:
>>>> On Fri, May 13, 2022 at 1:41 PM Martin Ortuno wrote:
>>>>> El vie., 13 de mayo de 2022 3:30 p. m., Martin Ortuno escribió:
>>>>>> El vie., 13 de mayo de 2022 11:51 a. m., William Deegan escribió:
>>   >>>>> On Fri, May 13, 2022 at 8:46 AM Martin Ortuno wrote:>>>>>> On one
>> project we are using cygwin v2.3.1 for 32 bits as a
>>   >>>>>> building environment... We are integrating a library that
>>   >>>>>> is built scons, I tried to run scons v4.3.0-1 but when I
>>   >>>>>> prompt scons on the command line.
>>   >>>>>> Scons -v outputs nothing...
>>   >>>>>> I would appreciate your support in this matters...
>>
>>>>>>> Are you sure you're running scons from cygwin?
>>>>>>> Which version of python do you have installed?
>>
>>>>>> On the cygwin envuronment i have both python 2.7.10 and python 3.4.3,
>>>>>> the one which is by default is python 2...
>>>>>> Pretty sure that's the reason why is not working, i think we need
>> python
>>>>>> 3.9 for scons...
>>>>>> The problem now is that i cannot install successfully python 3.9. I
>>>>>> tried with the setup-x86, just updating python3... However after that
>>>>>> python3 stops working...
>>>>>> I'd appreciate any advice or support...
>>
>>>>> Actually i tried to open python3.9 from windows directly  and then the
>>>>> application crashes saying:
>>>>> "The procedure entry point __locale_ctype_ptr could not be located in
>> the
>>>>> dynamic link library
>>>>> C:\Path\toCygwin\bin\libpython3.9.dll"
>>
>>>> vi `which scons`
>>>> and see which python it's trying to use.
>>>> (from within your cygwin shell)
>>>> Very surprised you get no output.
>>
>>   > I am prompting which scons:
>>   > Output:
>>   > /bin/scons/
>>
>> That output makes no sense!
>> Please paste actual commands and outputs from terminal.
>>
>> Might be more useful running:
>>
>>          $ ls -glo /usr/bin/python
>>          lrwxrwxrwx 1 24 Feb 17  2021 /usr/bin/python ->
>> /etc/alternatives/python
>>          $ alternatives --display python
>>          python - status is auto.
>>           link currently points to /usr/bin/python3.9
>>          /usr/bin/python2.7 - priority 27
>>          /usr/bin/python3.8 - priority 38
>>          /usr/bin/python3.7 - priority 37
>>          /usr/bin/python3.6 - priority 36
>>          /usr/bin/python3.9 - priority 39
>>          Current `best' version is /usr/bin/python3.9.
>>          $ cygcheck -c scons
>>          Cygwin Package Information
>>          Package              Version        Status
>>          scons                ...            OK
>>          $ head -n1 /usr/bin/scons
>>          #!/usr/bin/python...