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

Jesper Louis Andersen <>
Wed May 13 15:06:13 CEST 2015


And edited to add, I know the version given by sha ce96ab6 compiled
(OTP-18.0-rc1-503-gce96ab6).


On Wed, May 13, 2015 at 3:04 PM, Jesper Louis Andersen <
> wrote:

> I'll just attach this here, but on my machine the BEAM emulator segfaults
> under the build if passed the --enable-dirty-schedulers option:
>
> git checkout -b t OTP-18.0-rc2
> git clean -dfxq
> ./otp_build autoconf
> ./configure --enable-dirty-schedulers --prefix=/usr/local/stow/$(git
> describe)
> make -j 10
>
> I had expected this to complete and give my an 'erl' with dirty schedulers
> enabled, but once it gets into 'erlc' compiling it's first binary, the
> command segfaults. Not passing --enable-dirty-schedulers works.
>
> Is this confirmable by anyone else, just to rule out my machine from the
> loop?
>
>
> On Wed, May 13, 2015 at 1:48 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:
>>       - scheduler specific timer wheels,
>>       - scheduler specific BIF timer management,
>>       - 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 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
>>
>> _______________________________________________
>> erlang-questions mailing list
>> 
>> http://erlang.org/mailman/listinfo/erlang-questions
>>
>>
>
>
> --
> J.
>



-- 
J.
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