Please show us the results of the following two commands: $ which -a alternatives
$ ls -glo $( which -a alternatives ) Please note that /usr/sbin/alternatives must be executed in an elevated shell. The folder containing it is not normally included in the path for a non-elevated shell. It is considered to be a command used by the administrator rather than the user. The easiest way to do this is to right click on the "Cygwin Terminal" icon on the desktop or a shortcut to it in the start menu and click on Run as administrator. Then execute $ /usr/sbin/alternatives --verbose --auto python If you see this message "failed to replace /var/lib/alternatives/python with /var/lib/alternatives/python.new: Permission denied", you are not running in an elevated shell. If you see this message "link points to no alternative -- setting mode to manual", please run this command $ /usr/sbin/alternatives --test --auto python which will show which link is missing, as there will be a blank line after the link name instead of a priority. This may not be a serious problem, but I am investigating why it occurs. BTW, this is the output on my system: $ /usr/sbin/alternatives --display python python - status is manual. link currently points to /usr/bin/python3.9.exe /usr/bin/python2.7 - priority 27 /usr/bin/python3.8 - priority 38 /usr/bin/python3.6 - priority 36 /usr/bin/python3.7 - priority 37 /usr/bin/python3.9 - priority 39 Current `best' version is /usr/bin/python3.9. With this setup, using "python" runs "version 3.9", "python2" runs "version 2.7", "python3.x" runs the corresponding "version 3.x". "python3" gives "-bash: python3: command not found". HTH Doug (alternatives maintainer) On Sun, May 15, 2022 at 2:44 PM Brian Inglis <brian.ing...@systematicsw.ab.ca> wrote: > > 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. This is the expected display when you have only python3.9 installed. - Doug > > 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.ing...@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... > > -- > Problem reports: https://cygwin.com/problems.html > FAQ: https://cygwin.com/faq/ > Documentation: https://cygwin.com/docs.html > Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple -- Doug Henderson, Calgary, Alberta, Canada - from gmail.com -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
