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 +1,58 @@
+
+/* Support for dynamic loading of extension modules */
+
+#include "dl.h"
+#include <errno.h>
+
+#include "Python.h"
+#include "importdl.h"
+
+#if defined(__hp9000s300)
+#define FUNCNAME_PATTERN "_init%.200s"
+#else
+#define FUNCNAME_PATTERN "init%.200s"
+#endif
+
+const struct filedescr _PyImport_DynLoadFiletab[] = {
+    {SHLIB_EXT, "rb", C_EXTENSION},
+    {"module"SHLIB_EXT, "rb", C_EXTENSION},
+    {0, 0}
+};
+
+dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
+                                    const char *pathname, FILE *fp)
+{
+    dl_funcptr p;
+    shl_t lib;
+    int flags;
+    char funcname[258];
+
+    flags = BIND_FIRST | BIND_DEFERRED;
+    if (Py_VerboseFlag) {
+        flags = BIND_FIRST | BIND_IMMEDIATE |
+            BIND_NONFATAL | BIND_VERBOSE;
+        printf("shl_load %s\n",pathname);
+    }
+    lib = shl_load(pathname, flags, 0);
+    /* XXX Chuck Blake once wrote that 0 should be BIND_NOSTART? */
+    if (lib == NULL) {
+        char buf[256];
+        if (Py_VerboseFlag)
+            perror(pathname);
+        PyOS_snprintf(buf, sizeof(buf), "Failed to load %.200s",
+                      pathname);
+        PyErr_SetString(PyExc_ImportError, buf);
+        return NULL;
+    }
+    PyOS_snprintf(funcname, sizeof(funcname), FUNCNAME_PATTERN, shortname);
+    if (Py_VerboseFlag)
+        printf("shl_findsym %s\n", funcname);
+    if (shl_findsym(&lib, funcname, TYPE_UNDEFINED, (void *) &p) == -1) {
+        shl_unload(lib);
+        p = NULL;
+    }
+    if (p == NULL && Py_VerboseFlag)
+        perror(funcname);
+
+    return p;
+}