Re: Erlang OTP 23.0 Released

Александр Ульев aleksandr.uljev@REDACTED
Wed May 13 11:12:04 CEST 2020

Congratulations everyone!
среда, 13 мая 2020г., 13:48 +05:00 от Henrik Nord X  henrik.x.nord@REDACTED :

>OTP 23
>Erlang/OTP 23 is a new major release with new features, improvements as
>well as a few incompatibilities.
>Potential Incompatibilities
>    SSL:
>        Support for SSL 3.0 is completely removed.
>        TLS 1.3 is added to the list of default supported versions.
>    erl_interface: Removed the deprecated parts of erl_interface
>(erl_interface.h and essentially all C functions with prefix erl_).
>    The deprecated erlang:get_stacktrace/0 BIF now returns an empty
>list instead of a stacktrace. erlang:get_stacktrace/0 is scheduled for
>removal in OTP 24.
>Improvements and new features
>    ssh:
>        OpenSSH 6.5 introduced a new file representation of keys called
>openssh-key-v1. This is now supported with the exception of handling
>encrypted keys.
>        Algorithm configuration could now be done in a .config file.
>This is useful for example to enable an algorithm that is disabled by
>default without need to change the code.
>    SSL:
>        Support for the middlebox compatibility mode makes the TLS 1.3
>handshake look more like a TLS 1.2 handshake and increases the chance
>of successfully establishing TLS 1.3 connections through legacy
>        Add support for key exchange with Edward curves and PSS-RSA
>padding in signature verification
>    The possibility to run Erlang distribution without relying on EPMD
>has been extended. To achieve this a couple of new options to the inet
>distribution has been added.
>        -dist_listen false Setup the distribution channel, but do not
>listen for incoming connection.
>        -erl_epmd_port Port Configure a default port that the built-in
>EPMD client should return.
>    A first EXPERIMENTAL socket backend to
>    gen_tcp and inet has been implemented. gen_udp and gen_sctp will
>    Putting {inet_backend, socket} as first option to listen() or
>connect() makes it easy to try this for existing code
>    A new module erpc in kernel which implements an enhanced subset of
>the operations provided by the rpc module. Enhanced in the sense that
>it makes it possible to distinguish between returned value, raised
>exceptions and other errors. erpc also has better performance and
>scalability than the original rpc implementation. This by utilizing the
>newly introduced spawn_request() BIF. Also the rpc module benefits from
>these improvements by utilizing erpc when possible.
>    Scalability and performance Improvements plus new functionality
>regarding distributed spawn operations.
>    In binary matching, the size of the segment to be matched is now
>allowed to be a guard expression (EEP-52)
>    When matching with maps the keys can now be guard expressions (EEP-
>    ssh: support for TCP/IP port forwarding, a.k.a tunnelling a.k.a as
>tcp-forward/direct-tcp is implemented. In the OpenSSH client, this
>corresponds to the options -L and -R.
>    Allow underscores in numeric literals to improve readability.
>Examples: 123_456_789, 16#1234_ABCD.
>    New functions in the shell for displaying documentation for Erlang
>modules, functions and types. The
>    functions are:
>        h/1,2,3 -- Print the documentation for a Module:Function/Arity.
>        ht/1,2,3 -- Print the type documentation for a
>        The embedded documentation is created as docchunks (EEP 48)
>when building the Erlang/OTP documentation.
>    kernel: The module pg with a new implementation of distributed
>named process groups is introduced. The old module pg2 is deprecated
>and scheduled for removal in OTP 24.
>    Our tool chain for building the Windows packages is upgraded with
>new C++ compiler, Java compiler, OpenSSL libraries and wxWidgets
>versions. We are now using WSL (the Linux Subsystem for Windows when
>building) which makes it easier to handle the build environment.
>For more details see
>Pre built versions for Windows can be fetched here:
>Online documentation can be browsed here:
>The Erlang/OTP source can also be found at GitHub on the official
>Erlang repository,
>As always:
>Than you all for your contributions.
>Erlang/OTP Team 
>Ericsson AB
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