Bug report

Bug description:

When building CPython with libmpdec, enabling the EXTRA_FUNCTIONALITY option fails to compile:

./Modules/_decimal/_decimal.c:6996:12: error: too few arguments to function '_decimal_Context__apply'
  6996 |     return _decimal_Context__apply(context, x);
      |            ^~~~~~~~~~~~~~~~~~~~~~~

Steps to reproduce

1. Install libmpdec.
2. CFLAGS="-DEXTRA_FUNCTIONALITY" ./configure --with-pydebug
3. make -j

Proposed fix

The wrapper should call the implementation function directly: _decimal_Context__apply_impl(context, cls, x).
If acceptable, I plan to open a PR for this.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-152870: Fix compile error with decimal when EXTRA_FUNCTIONALITY enabled #152871
• [3.15] gh-152870: Fix compile error with decimal when EXTRA_FUNCTIONALITY enabled (GH-152871) #152937