Re: [Lmod-users] changes to tcl 'break' statement in lmod 8 series

[Robert M. <mc...@ta...>]

Well yes and no.  There is no change in how break is or has been handled
since forever. The change in supporting break is in Lmod 8.6+

The change is that by default Lmod now includes the TCL interpreter as part
of the Lmod executable instead of executing a system call (/usr/bin/tclsh
....).  You can configure Lmod to not include the tcl interpreter library
as part of Lmod.  That should give you the old behavior.
Use --with-fastTCLInterp=no to configure Lmod without the tcl integration.

I would be interested in seeing how Lmod 8.6+ works with your modules even
if you don't deploy it to users.


Best,
Robert.


On Mon, Mar 21, 2022 at 2:20 PM Shrader, David Lee via Lmod-users <
lmo...@li...> wrote:

> Hello,
>
>
> We're are potentially going from Lmod 7.8.16 to 8.4.10, and we have
> noticed that our tcl modulefiles that call "break" after a "puts stderr
> ..." message now generate something like the following error:
>
>
> Lmod has detected the following error:  Unable to load module because of
> error when evaluating modulefile: foo3
>      /modulefiles/foo3/1.0: [string "LmodMsgRaw([===[already set..."]:4:
> unexpected symbol near '}'
>
> We have used this method of "puts stderr...; break" to exit out of a
> particular modulefile when an error occurs, such as a missing directory.
>
> In looking over the readthedocs tcl function page, it looks like the
> "break" function has seen some attention, but we are looking at 8.4.10, not
> 8.6+. Did something change for the "break" command in 8.0 to 8.5 such that
> it won't work as we have been using it in 7.x?
>
>
> Thank you very much for any and all help!
>
> David
>
>
> --
> David Shrader
> HPC-ENV High Performance Computing Systems
> Los Alamos National Lab
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-- 
Robert McLay, Ph.D.
Manager of Software Tools, HPC
mc...@ta...