MacPorts 2.7.0-rc1 now available for testing

[Joshua Root]

Source code and pkgs for MacPorts 2.7.0-rc1 are now
available [1]. Testing of either of these install methods is helpful.

Be prepared to encounter bugs. As always, having a recent backup would
be wise. Please report any bugs that you find [2] (after first searching
Trac [3], of course!)

If no show-stopping bugs are found in the next few days, this will
become the 2.7.0 release.

There are a large number of changes in this release. See the ChangeLog
[4] for a list of most of them. You may like to focus your testing on
the new features in that list, as well as your normal usage.

Changes since beta2 are:
   * Fixed build failure on <= 10.6.
   * Adjusted minimum compiler version for C++17.
   * Using `-j1` for the benefit of ninja when `build.jobs` is 1 (instead
     of no `-j` option), and setting `use_parallel_build no` changes the
     value of `build.jobs` to 1 rather than omitting the `-j` option.
   * Checking some more logs for implicit function declarations.
   * Printing some more possibly helpful log locations when configure
     fails.

Cheers,
Josh

[1] <https://github.com/macports/macports-base/releases/tag/v2.7.0-rc1>
[2] <https://trac.macports.org/newticket>
[3] <https://trac.macports.org/search>
[4] <https://github.com/macports/macports-base/blob/release-2.7/ChangeLog>


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