port 2P step 1: vendor CPython 2.7.18 as the mtpython static library

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>
2026-09-23 08:27:35 +09:00
parent a9b31dec67
commit 5fad769ee8
1018 changed files with 652582 additions and 19 deletions
@@ -0,0 +1,172 @@
+
+/* Wrap void* pointers to be passed between C modules */
+
+#include "Python.h"
+
+
+/* Declarations for objects of type PyCObject */
+
+typedef void (*destructor1)(void *);
+typedef void (*destructor2)(void *, void*);
+
+static int cobject_deprecation_warning(void)
+{
+    return PyErr_WarnPy3k("CObject type is not supported in 3.x. "
+        "Please use capsule objects instead.", 1);
+}
+
+
+PyObject *
+PyCObject_FromVoidPtr(void *cobj, void (*destr)(void *))
+{
+    PyCObject *self;
+
+    if (cobject_deprecation_warning()) {
+        return NULL;
+    }
+
+    self = PyObject_NEW(PyCObject, &PyCObject_Type);
+    if (self == NULL)
+        return NULL;
+    self->cobject=cobj;
+    self->destructor=destr;
+    self->desc=NULL;
+
+    return (PyObject *)self;
+}
+
+PyObject *
+PyCObject_FromVoidPtrAndDesc(void *cobj, void *desc,
+                             void (*destr)(void *, void *))
+{
+    PyCObject *self;
+
+    if (cobject_deprecation_warning()) {
+        return NULL;
+    }
+
+    if (!desc) {
+        PyErr_SetString(PyExc_TypeError,
+                        "PyCObject_FromVoidPtrAndDesc called with null"
+                        " description");
+        return NULL;
+    }
+    self = PyObject_NEW(PyCObject, &PyCObject_Type);
+    if (self == NULL)
+        return NULL;
+    self->cobject = cobj;
+    self->destructor = (destructor1)destr;
+    self->desc = desc;
+
+    return (PyObject *)self;
+}
+
+void *
+PyCObject_AsVoidPtr(PyObject *self)
+{
+    if (self) {
+        if (PyCapsule_CheckExact(self)) {
+            const char *name = PyCapsule_GetName(self);
+            return (void *)PyCapsule_GetPointer(self, name);
+        }
+        if (self->ob_type == &PyCObject_Type)
+            return ((PyCObject *)self)->cobject;
+        PyErr_SetString(PyExc_TypeError,
+                        "PyCObject_AsVoidPtr with non-C-object");
+    }
+    if (!PyErr_Occurred())
+        PyErr_SetString(PyExc_TypeError,
+                        "PyCObject_AsVoidPtr called with null pointer");
+    return NULL;
+}
+
+void *
+PyCObject_GetDesc(PyObject *self)
+{
+    if (self) {
+        if (self->ob_type == &PyCObject_Type)
+            return ((PyCObject *)self)->desc;
+        PyErr_SetString(PyExc_TypeError,
+                        "PyCObject_GetDesc with non-C-object");
+    }
+    if (!PyErr_Occurred())
+        PyErr_SetString(PyExc_TypeError,
+                        "PyCObject_GetDesc called with null pointer");
+    return NULL;
+}
+
+void *
+PyCObject_Import(char *module_name, char *name)
+{
+    PyObject *m, *c;
+    void *r = NULL;
+
+    if ((m = PyImport_ImportModule(module_name))) {
+        if ((c = PyObject_GetAttrString(m,name))) {
+            r = PyCObject_AsVoidPtr(c);
+            Py_DECREF(c);
+	}
+        Py_DECREF(m);
+    }
+    return r;
+}
+
+int
+PyCObject_SetVoidPtr(PyObject *self, void *cobj)
+{
+    PyCObject* cself = (PyCObject*)self;
+    if (cself == NULL || !PyCObject_Check(cself) ||
+	cself->destructor != NULL) {
+	PyErr_SetString(PyExc_TypeError, 
+			"Invalid call to PyCObject_SetVoidPtr");
+	return 0;
+    }
+    cself->cobject = cobj;
+    return 1;
+}
+
+static void
+PyCObject_dealloc(PyCObject *self)
+{
+    if (self->destructor) {
+        if(self->desc)
+            ((destructor2)(self->destructor))(self->cobject, self->desc);
+        else
+            (self->destructor)(self->cobject);
+    }
+    PyObject_DEL(self);
+}
+
+
+PyDoc_STRVAR(PyCObject_Type__doc__,
+"C objects to be exported from one extension module to another\n\
+\n\
+C objects are used for communication between extension modules.  They\n\
+provide a way for an extension module to export a C interface to other\n\
+extension modules, so that extension modules can use the Python import\n\
+mechanism to link to one another.");
+
+PyTypeObject PyCObject_Type = {
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "PyCObject",		/*tp_name*/
+    sizeof(PyCObject),		/*tp_basicsize*/
+    0,				/*tp_itemsize*/
+    /* methods */
+    (destructor)PyCObject_dealloc, /*tp_dealloc*/
+    0,				/*tp_print*/
+    0,				/*tp_getattr*/
+    0,				/*tp_setattr*/
+    0,				/*tp_compare*/
+    0,				/*tp_repr*/
+    0,				/*tp_as_number*/
+    0,				/*tp_as_sequence*/
+    0,				/*tp_as_mapping*/
+    0,				/*tp_hash*/
+    0,				/*tp_call*/
+    0,				/*tp_str*/
+    0,				/*tp_getattro*/
+    0,				/*tp_setattro*/
+    0,				/*tp_as_buffer*/
+    0,				/*tp_flags*/
+    PyCObject_Type__doc__	/*tp_doc*/
+};