Hello IPMC and Apache DataSketches Community,

1. This is a call for vote to release Apache DataSketches-cpp version:
2.0.0-incubating-rc2

    NOTE 1: The C++ code provides a header-only library. Compilation
is needed only to build unit tests. A Python extension is also
included in this repository as a set of thin wrappers. That does
produce a compiled artifact, but is not built by default.

    NOTE 2: Compiling the C++ unit tests requires CMake 3.12 or newer.

    NOTE 3: During the release process, we discovered one unit test
file (sampling/test/var_opt_union_test.cpp) missing a copyright
header.


  A. Results from the PPMC vote:

     - 1 (+1 binding) vote, 2 (+1 non-binding) votes

     - The vote thread can be found at the Permalink:
       
https://lists.apache.org/thread.html/rf34f3bc1ca54d5fcec3fa88a18ef7005312f54bf7e7e9671ffdadbee%40%3Cdev.datasketches.apache.org%3E

  B. Testing/actions/votes performed by the voters in the PPMC Stage 1:

    - Alexander Saydakov (+1 non-binding)
      Checked:
      - gpg signature
      - shasum
      - cmake, make, make test
      - python wrapper build: had to specify python3 explicitly and sudo install
      - tried using CPC sketch in python environment

    - Lee Rhodes (+1 non-binding)
      Checked:
      - gpg signature
      - shasum
      - cmake, make, make test
      - Confirmed Licenses in LICENSE file are still relevant.
      - NOTICE and DISCLAIMER-WIP look good.
      - minor formatting problems in README.md:
        The file has some tabs, which should be replaced by 4-spaces.
        Line 25 needs 4 leading spaces not 2; this messes up the rendering of
        that section.

    - Furkan Kamachi (+1 binding)
      I checked:
      - Incubating in name
      - DISCLAIMER-WIP exists
      - LICENSE and NOTICE are fine
      - Checked PGP signatures
      - Checked Checksums
      - cmake, make, make test for cpp
      - python wrapper build (tried with python3)

2. Source repository:
    - https://github.com/apache/incubator-datasketches-cpp

    Git Tag for this release:
    - 
https://github.com/apache/incubator-datasketches-cpp/tree/2.0.0-incubating-rc2
on branch 2.0.x-incubating

    Git HashId for this release starts with: c51298d

3. The Release Candidate / Dist (Zip Repository):
    - 
https://dist.apache.org/repos/dist/dev/incubator/datasketches/cpp/2.0.0-incubating-rc2/

    The public signing key can be found in the KEYS file:
    - https://dist.apache.org/repos/dist/dev/incubator/datasketches/KEYS

    The artifacts have been signed with --keyid-format SHORT : 38F334CC

4. C++ Test Guide:
    - 
https://github.com/apache/incubator-datasketches-cpp/blob/2.0.0-incubating-rc2/README.md
5. Python Build & Test Guide:
    - 
https://github.com/apache/incubator-datasketches-cpp/blob/2.0.0-incubating-rc2/python/README.md
    - Most python unit tests are written in a tutorial style that can
be followed as example usage:
https://github.com/apache/incubator-datasketches-cpp/tree/2.0.0-incubating-rc2/python/tests
    - Only python 3 is supported

6. This is the second stage vote:
   - This voting process will remain open for at least 72 hours and
until at least 3 (+1) IPMC votes or a majority of (+1) are acquired.

Please vote accordingly:

[ ] +1 approve
[ ] +0 no opinion
[ ] -1 disapprove with the reason
Thanks,
Jon malkinjmal...@apache.org <http://jmalkinapache.org>

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