[erlang-questions] Erlang/OTP 18.0-rc2 is available for testing

Loïc Hoguin essen@REDACTED
Wed May 13 14:51:07 CEST 2015

Everything looks fine after running the test suites.

Good job everyone involved!

On 05/13/2015 02:48 PM, Kenneth Lundin wrote:
> Erlang/OTP 18.0-rc2 is available for testing.
> This is the second and last release candidate before the final OTP 18.0
> product release in June 2015.
> Between the 18.0 rc1 and 18.0 rc 2 and the final release there will be
> new updates of
> the master branch with corrections and minor new features.
> Occasionally there might be new tags which we in that
> case will communicate and ask you to test.
> Erlang/OTP 18.0 is a new major release with new features, quite a few
> (characteristics) improvements, as well as a few incompatibilities.
> See the Release Notes and the documentation for more details.
> We would like to ask you to build and test this release candidate and
> send us
> your feedback as soon as possible, so that we can make the necessary
> corrections before OTP 18.0.
> The release contains many changes; thus, some unexpected incompatibilities
> or issues may have slipped through our tests.
> Please try to build and run your current products/applications and let us
> know about any problems.
> *IMPORTANT INFO when building your own code with this OTP release
> *
> Since erlang:now is deprecated your build might stop if you are using
> "warnings as errors".
> To let the build through you can turn of warnings for deprecated functions
> by setting an environment variable like this:
>    export ERL_COMPILER_OPTIONS=nowarn_deprecated_function
> Some highlights of the release are:
>   * dialyzer: The -dialyzer() attribute can be used for suppressing
>     warnings
>     in a module by specifying functions or warning options.
>     It can also be used for requesting warnings in a module.
>   * erts: The time functionality has been extended. This includes a new
>     API for
>     time, as well as "time warp" modes which alters the behavior when
>     system time changes. You are strongly encouraged to use the new API
>     instead of the old API based on erlang:now/0. erlang:now/0 has been
>     deprecated since it will always be a scalability bottleneck.
>     For more information see the Time and Time Correction chapter of the
>     ERTS User's Guide. Here is a link
>     http://www.erlang.org/documentation/doc-7.0-rc2/erts-7.0/doc/html/time_correction.html
>   * erts: Beside the API changes and time warp modes a lot of
>     scalability and performance improvements regarding time management
>     has been made. Examples are:
>       o scheduler specific timer wheels,
>       o scheduler specific BIF timer management,
>       o parallel retrieval of monotonic time and system time on OS:es
>         that support it.
>   * erts: The previously introduced "eager check I/O" feature is now
>     enabled by default.
>   * erts/compiler: enhanced support for maps. Big maps new uses a HAMT
>     (Hash Array Mapped Trie) representation internally which makes them
>     more efficient. There is now also support for variables as map keys.
>   * ssl: Remove default support for SSL-3.0 and added padding check for
>     TLS-1.0 due to the Poodle vulnerability.
>   * ssl: Remove default support for RC4 cipher suites, as they are
>     consider too weak.
>   * stdlib: Allow maps for supervisor flags and child specs
> You can find the Release Notes with more detailed info at
> http://www.erlang.org/download/OTP-18.0-rc2.README
> You find the source code at github.com <http://github.com> in the
> official Erlang repository.
> Git tag OTP-18.0-rc2
> https://github.com/erlang/otp/tree/OTP-18.0-rc2
> You can also read the documentation on-line here:
> (see the Release Notes mentioned above for release notes which
> are not updated in the doc, but the new functionality is)
> http://www.erlang.org/documentation/doc-7.0-rc2/doc/
> We also want to thank those that sent us patches, suggestions and bug
> reports.
> The Erlang/OTP Team at Ericsson
> _______________________________________________
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Loïc Hoguin

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