[erlang-questions] R20 escript does not accept "-smp disable"

[Dmytro Lytovchenko]

Non-SMP runtime has been disabled in OTP 20 and will be removed in OTP 21
(summer 2018).
Observe here
https://groups.google.com/forum/#!topic/erlang-programming/e8BgIzWxoLo

2018-02-07 0:33 GMT+01:00 Mark Geib <mark.geib.44@REDACTED>:

> Did the escript command line args change in R20.? I could not find any
> reference with a quick search.
>
> I recently upgraded Erlang on my mac, via homebrew to R20. The first time
> I went to test an application using cuttlefish I received this error.
>
> Argument '-smp disable' not supported. Use "+S 1" instead.
> Usage: erl [-version] [-sname NAME | -name NAME] [-noshell] [-noinput]
> [-env VAR VALUE] [-compile file ...] [-smp [auto|enable]] [-make] [-man
> [manopts] MANPAGE] [-x] [-emu_args] [-start_epmd BOOLEAN] [-args_file
> FILENAME] [+A THREADS] [+a SIZE] [+B[c|d|i]] [+c [BOOLEAN]] [+C MODE] [+h
> HEAP_SIZE_OPTION] [+K BOOLEAN] [+l] [+M<SUBSWITCH> <ARGUMENT>] [+P
> MAX_PROCS] [+Q MAX_PORTS] [+R COMPAT_REL] [+r] [+rg READER_GROUPS_LIMIT]
> [+s SCHEDULER_OPTION] [+S NO_SCHEDULERS:NO_SCHEDULERS_ONLINE] [+SP
> PERCENTAGE_SCHEDULERS:PERCENTAGE_SCHEDULERS_ONLINE] [+T LEVEL] [+V] [+v]
> [+W<i|w|e>] [+z MISC_OPTION] [args …]
>
> I wrote a trivial escript of my own and sure enough, with R19 it works
> fine, with R20 the above error.
>
> Here is the escript I am using for testing.
>
> #!/usr/local/Cellar/erlang@REDACTED/19.3.6.4//bin/escript
>
> %%! -smp disable -sname demo -setcookie cookie
>
> -define(ME, filename:basename(escript:script_name())).
> -include_lib("kernel/include/file.hrl").
>
> main(Args) ->
>     io:format("Args:~s~n~n",
>               [Args]),
>     halt(0).
>
> Cuttlefish uses {escript_emu_args, "%%! -escript main cuttlefish_escript
> -smp disable +A 0\n”}. in it’s the rebar.config.
>
> Thanks,
> Mark.
>
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>
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