[ET Trac] #2811: Formaline Optionally use non-system Perl

[Roland Haas]

#2811: Formaline Optionally use non-system Perl

 Reporter: Yosef Zlochower
   Status: open
Milestone: 
  Version: 
     Type: proposal
 Priority: minor
Component: Cactus

Comment (by Roland Haas):

Cactus' build system uses the `make` \(and thus shell\) variable `$PERL` for the location of the configured Perl interpreter. This cannot quite be used in the `#!` line since that line does not do variable expansion. 

We also cannot use any options of `env` other than the ones in POSIX: [https://pubs.opengroup.org/onlinepubs/9699919799/utilities/env.html](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/env.html) so `-S` is not possible \(though it does seems to be supported on Linux and macOS\). Otherwise using something like `env -S ${PERL} -w` would be great.

Instead the Cactus make files run perl scripts as `$PERL foo.pl` and the scripts should use `use warnings;` instead of the `-w` switch.

Is that something that you could give a try? I am not sure what other scripts in Formaline exist that are directly called and not already via `$PERL`.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2811/formaline-optionally-use-non-system-perl
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