Link mtpython into port_logic and copy 40250's ScriptLib launcher across:
PythonLauncher, PythonUtils and PythonMarshal, plus the 12 forwarding headers
that make its `#include <Python-2.7/*>` lines compile unchanged. symtable.h
forward-declares mod_ty rather than including Python-ast.h, whose one-word
macros (Delete, Module, Set, Print) collide with EterLib/Pool.h — the same
clash 40250 sidestepped by commenting out PySymtable_Build.
Two `// PORT:` edits: `unsigned char(val)` is an MSVC extension (PythonUtils.cpp,
twice), and PyObject_AsCharBuffer wants a Py_ssize_t* (TraceFunc).
port_python_launcher_test drives the launcher in the order UserInterface.cpp
does (:241-434): Create(), __DEBUG__/__COMMAND_LINE__, TRUE/FALSE, a CRLF script
through RunMemoryTextFile, a .pyc through RunCompiledFile, then RunFile reading
system.py out of the real pack. It stops at `ImportError: No module named app`,
i.e. the first C++ module RunMainScript registers — that is the 2V0 slice, and
the stdlib behind it is step 3. The host flags (Py_NoSiteFlag and friends) sit
in the test for now; step 3 moves them into the platform layer.
port-map statuses are set only for what the test actually executes: 10 of 12
launcher functions and 4 of 11 marshal ones (the small-.pyc path delegates to
CPython's own reader, so the ported r_object stays unreached). PythonUtils
compiles but nothing calls it until the binding modules arrive, so it stays TODO.
Windows has no mtpython yet, so port_logic drops ScriptLib and the shims there.
Tests: macOS ctest 27/27 incl. port.python_launcher; port_logic (with ScriptLib)
also compiles for android arm64 (NDK API 24) and ios arm64.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The embedded 40250 script layer needs its own interpreter on five platforms.
2.7 is end-of-life, so nothing can be fetched from the target SDKs and the
source is vendored (official 2.7.18 tarball, trimmed to 25MB; Lib/ stays for
step 3's python27.zip).
cpython-2.7.18/CMakeLists.txt builds one `mtpython` static library from exactly
the 133 objects the reference libpython2.7.a contains, off by default behind
-DMTGODOT_EMBED_PYTHON=ON. The source list and the built-in module table
(config/config.c, 39 entries) are shared; pyconfig.h is a probe result and is
not, so each platform keeps its own under config/<platform>/, regenerated by
tools/py_embed/gen_pyconfig.sh and checked against the shared table.
Three vendor patches, documented in docs/THIRD-PARTY.md: configure/configure.ac
learn arm64 on macOS, and posixmodule.c undefines the process-control calls it
hard-defines past pyconfig.h when building for iOS.
macOS (ctest python.embed: every builtin imports, codecs and pickle work off the
vendored Lib/), Android arm64 and iOS arm64 build. Linux needs a Linux host and
Windows needs a MinGW-vs-MSVC decision; both are noted for step 4.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
