ANN: gcc-python-plugin 0.17

[David Malcolm]

gcc-python-plugin is a plugin for GCC 4.6 onwards which embeds the
CPython interpreter within GCC, allowing you to write new compiler
warnings in Python, generate code visualizations, etc.

This release adds support for gcc 9 (along with continued support for
gcc 4.6, 4.7, 4.8, 4.9, 5, 6, 7, and 8).

Unfortunately, the reference-count checker no longer works for gcc 7
onwards, so it is disabled when embedded in those builds of gcc.

Additionally, this release contains the following improvements:

* the plugin can now be built in a separate build directory from the
  source directory (thanks to Tom de Vries)

* gcc-with-cpychecker gained a --cpychecker-verbose option

Tarball releases are available at:
  https://github.com/davidmalcolm/gcc-python-plugin/releases

Prebuilt-documentation can be seen at:
  http://gcc-python-plugin.readthedocs.org/en/latest/index.html

The plugin is Free Software, licensed under the GPLv3 or later.

Enjoy!
Dave Malcolm