Description:

This is a plugin for GCC, which links against libpython, and
(I hope) allows you to invoke arbitrary Python scripts from
inside the compiler. The aim is to allow you to write GCC
plugins in Python.

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

It's still at the "experimental proof-of-concept stage";
expect crashes and tracebacks (I'm new to insides of GCC,
and I may have misunderstood things).

It's already possible to use this to add additional compiler
errors/warnings, e.g. domain-specific checks, or static
analysis. One of my goals for this is to "teach" GCC about
the common mistakes people make when writing extensions for
CPython, but it could be used e.g. to teach GCC about GTK's
reference-counting semantics, or about locking in the Linux
kernel, or about signal-safety in APIs.