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>
This commit is contained in:
shenlei
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/* Readline interface for tokenizer.c and [raw_]input() in bltinmodule.c.
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By default, or when stdin is not a tty device, we have a super
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simple my_readline function using fgets.
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Optionally, we can use the GNU readline library.
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my_readline() has a different return value from GNU readline():
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- NULL if an interrupt occurred or if an error occurred
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- a malloc'ed empty string if EOF was read
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- a malloc'ed string ending in \n normally
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*/
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#include "Python.h"
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#ifdef MS_WINDOWS
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#define WIN32_LEAN_AND_MEAN
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#include "windows.h"
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#endif /* MS_WINDOWS */
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#ifdef __VMS
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extern char* vms__StdioReadline(FILE *sys_stdin, FILE *sys_stdout, char *prompt);
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#endif
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PyThreadState* _PyOS_ReadlineTState;
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#ifdef WITH_THREAD
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#include "pythread.h"
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static PyThread_type_lock _PyOS_ReadlineLock = NULL;
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#endif
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int (*PyOS_InputHook)(void) = NULL;
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#ifdef RISCOS
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int Py_RISCOSWimpFlag;
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#endif
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/* This function restarts a fgets() after an EINTR error occurred
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except if PyOS_InterruptOccurred() returns true. */
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static int
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my_fgets(char *buf, int len, FILE *fp)
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{
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char *p;
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#ifdef MS_WINDOWS
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int i;
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#endif
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while (1) {
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if (PyOS_InputHook != NULL)
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(void)(PyOS_InputHook)();
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errno = 0;
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clearerr(fp);
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p = fgets(buf, len, fp);
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if (p != NULL)
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return 0; /* No error */
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#ifdef MS_WINDOWS
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/* Ctrl-C anywhere on the line or Ctrl-Z if the only character
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on a line will set ERROR_OPERATION_ABORTED. Under normal
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circumstances Ctrl-C will also have caused the SIGINT handler
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to fire. This signal fires in another thread and is not
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guaranteed to have occurred before this point in the code.
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Therefore: check in a small loop to see if the trigger has
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fired, in which case assume this is a Ctrl-C event. If it
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hasn't fired within 10ms assume that this is a Ctrl-Z on its
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own or that the signal isn't going to fire for some other
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reason and drop through to check for EOF.
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*/
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if (GetLastError()==ERROR_OPERATION_ABORTED) {
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for (i = 0; i < 10; i++) {
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if (PyOS_InterruptOccurred())
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return 1;
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Sleep(1);
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}
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}
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#endif /* MS_WINDOWS */
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if (feof(fp)) {
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clearerr(fp);
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return -1; /* EOF */
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}
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#ifdef EINTR
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if (errno == EINTR) {
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int s;
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#ifdef WITH_THREAD
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PyEval_RestoreThread(_PyOS_ReadlineTState);
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#endif
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s = PyErr_CheckSignals();
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#ifdef WITH_THREAD
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PyEval_SaveThread();
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#endif
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if (s < 0)
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return 1;
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/* try again */
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continue;
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}
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#endif
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if (PyOS_InterruptOccurred()) {
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return 1; /* Interrupt */
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}
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return -2; /* Error */
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}
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/* NOTREACHED */
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}
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/* Readline implementation using fgets() */
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char *
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PyOS_StdioReadline(FILE *sys_stdin, FILE *sys_stdout, char *prompt)
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{
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size_t n;
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char *p, *pr;
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n = 100;
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if ((p = (char *)PyMem_MALLOC(n)) == NULL)
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return NULL;
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fflush(sys_stdout);
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#ifndef RISCOS
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if (prompt)
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fprintf(stderr, "%s", prompt);
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#else
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if (prompt) {
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if(Py_RISCOSWimpFlag)
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fprintf(stderr, "\x0cr%s\x0c", prompt);
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else
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fprintf(stderr, "%s", prompt);
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}
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#endif
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fflush(stderr);
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switch (my_fgets(p, (int)n, sys_stdin)) {
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case 0: /* Normal case */
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break;
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case 1: /* Interrupt */
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PyMem_FREE(p);
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return NULL;
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case -1: /* EOF */
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case -2: /* Error */
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default: /* Shouldn't happen */
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*p = '\0';
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break;
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}
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n = strlen(p);
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while (n > 0 && p[n-1] != '\n') {
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size_t incr = n+2;
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if (incr > INT_MAX) {
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PyMem_FREE(p);
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PyErr_SetString(PyExc_OverflowError, "input line too long");
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return NULL;
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}
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pr = (char *)PyMem_REALLOC(p, n + incr);
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if (pr == NULL) {
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PyMem_FREE(p);
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PyErr_NoMemory();
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return NULL;
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}
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p = pr;
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if (my_fgets(p+n, (int)incr, sys_stdin) != 0)
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break;
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n += strlen(p+n);
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}
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pr = (char *)PyMem_REALLOC(p, n+1);
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if (pr == NULL) {
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PyMem_FREE(p);
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PyErr_NoMemory();
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return NULL;
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}
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return pr;
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}
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/* By initializing this function pointer, systems embedding Python can
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override the readline function.
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Note: Python expects in return a buffer allocated with PyMem_Malloc. */
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char *(*PyOS_ReadlineFunctionPointer)(FILE *, FILE *, char *);
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/* Interface used by tokenizer.c and bltinmodule.c */
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char *
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PyOS_Readline(FILE *sys_stdin, FILE *sys_stdout, char *prompt)
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{
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char *rv;
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if (_PyOS_ReadlineTState == PyThreadState_GET()) {
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PyErr_SetString(PyExc_RuntimeError,
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"can't re-enter readline");
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return NULL;
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}
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if (PyOS_ReadlineFunctionPointer == NULL) {
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#ifdef __VMS
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PyOS_ReadlineFunctionPointer = vms__StdioReadline;
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#else
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PyOS_ReadlineFunctionPointer = PyOS_StdioReadline;
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#endif
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}
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#ifdef WITH_THREAD
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if (_PyOS_ReadlineLock == NULL) {
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_PyOS_ReadlineLock = PyThread_allocate_lock();
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}
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#endif
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_PyOS_ReadlineTState = PyThreadState_GET();
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Py_BEGIN_ALLOW_THREADS
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#ifdef WITH_THREAD
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PyThread_acquire_lock(_PyOS_ReadlineLock, 1);
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#endif
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/* This is needed to handle the unlikely case that the
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* interpreter is in interactive mode *and* stdin/out are not
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* a tty. This can happen, for example if python is run like
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* this: python -i < test1.py
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*/
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if (!isatty (fileno (sys_stdin)) || !isatty (fileno (sys_stdout)))
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rv = PyOS_StdioReadline (sys_stdin, sys_stdout, prompt);
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else
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rv = (*PyOS_ReadlineFunctionPointer)(sys_stdin, sys_stdout,
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prompt);
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Py_END_ALLOW_THREADS
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#ifdef WITH_THREAD
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PyThread_release_lock(_PyOS_ReadlineLock);
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#endif
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_PyOS_ReadlineTState = NULL;
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return rv;
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}
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