Perform build and magnum tuning

Building o//third_party/python now takes 5 seconds on my PC

This change works towards modifying Python to use runtime dispatching
when appropriate. For example, when loading the magnums in the socket
module, it's a good idea to check if the magnum is zero, because that
means the local system platform doesn't support it.

third_party/python/PC/clinic/winsound.inc

@@ -0,0 +1,109 @@
+/*[clinic input]
+preserve
+[clinic start generated code]*/
+
+PyDoc_STRVAR(winsound_PlaySound__doc__,
+"PlaySound($module, /, sound, flags)\n"
+"--\n"
+"\n"
+"A wrapper around the Windows PlaySound API.\n"
+"\n"
+"  sound\n"
+"    The sound to play; a filename, data, or None.\n"
+"  flags\n"
+"    Flag values, ored together.  See module documentation.");
+
+#define WINSOUND_PLAYSOUND_METHODDEF    \
+    {"PlaySound", (PyCFunction)winsound_PlaySound, METH_FASTCALL, winsound_PlaySound__doc__},
+
+static PyObject *
+winsound_PlaySound_impl(PyObject *module, PyObject *sound, int flags);
+
+static PyObject *
+winsound_PlaySound(PyObject *module, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    static const char * const _keywords[] = {"sound", "flags", NULL};
+    static _PyArg_Parser _parser = {"Oi:PlaySound", _keywords, 0};
+    PyObject *sound;
+    int flags;
+
+    if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
+        &sound, &flags)) {
+        goto exit;
+    }
+    return_value = winsound_PlaySound_impl(module, sound, flags);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(winsound_Beep__doc__,
+"Beep($module, /, frequency, duration)\n"
+"--\n"
+"\n"
+"A wrapper around the Windows Beep API.\n"
+"\n"
+"  frequency\n"
+"    Frequency of the sound in hertz.\n"
+"    Must be in the range 37 through 32,767.\n"
+"  duration\n"
+"    How long the sound should play, in milliseconds.");
+
+#define WINSOUND_BEEP_METHODDEF    \
+    {"Beep", (PyCFunction)winsound_Beep, METH_FASTCALL, winsound_Beep__doc__},
+
+static PyObject *
+winsound_Beep_impl(PyObject *module, int frequency, int duration);
+
+static PyObject *
+winsound_Beep(PyObject *module, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    static const char * const _keywords[] = {"frequency", "duration", NULL};
+    static _PyArg_Parser _parser = {"ii:Beep", _keywords, 0};
+    int frequency;
+    int duration;
+
+    if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
+        &frequency, &duration)) {
+        goto exit;
+    }
+    return_value = winsound_Beep_impl(module, frequency, duration);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(winsound_MessageBeep__doc__,
+"MessageBeep($module, /, type=MB_OK)\n"
+"--\n"
+"\n"
+"Call Windows MessageBeep(x).\n"
+"\n"
+"x defaults to MB_OK.");
+
+#define WINSOUND_MESSAGEBEEP_METHODDEF    \
+    {"MessageBeep", (PyCFunction)winsound_MessageBeep, METH_FASTCALL, winsound_MessageBeep__doc__},
+
+static PyObject *
+winsound_MessageBeep_impl(PyObject *module, int type);
+
+static PyObject *
+winsound_MessageBeep(PyObject *module, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    static const char * const _keywords[] = {"type", NULL};
+    static _PyArg_Parser _parser = {"|i:MessageBeep", _keywords, 0};
+    int type = MB_OK;
+
+    if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
+        &type)) {
+        goto exit;
+    }
+    return_value = winsound_MessageBeep_impl(module, type);
+
+exit:
+    return return_value;
+}
+/*[clinic end generated code: output=bfe16b2b8b490cb1 input=a9049054013a1b77]*/