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/Include/unicodeobject.h

@@ -1,10 +1,9 @@
 #ifndef Py_UNICODEOBJECT_H
 #define Py_UNICODEOBJECT_H
-
-#include <stdarg.h>
+COSMOPOLITAN_C_START_
+/* clang-format off */
 
 /*
-
 Unicode implementation based on original code by Fredrik Lundh,
 modified by Marc-Andre Lemburg (mal@lemburg.com) according to the
 Unicode Integration Proposal. (See
@@ -55,8 +54,6 @@ Copyright (c) Corporation for National Research Initiatives.
  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  * -------------------------------------------------------------------- */
 
-#include <ctype.h>
-
 /* === Internal API ======================================================= */
 
 /* --- Internal Unicode Format -------------------------------------------- */
@@ -103,14 +100,6 @@ typedef wchar_t Py_UNICODE;
 # endif
 #endif
 
-#ifdef HAVE_WCHAR_H
-/* Work around a cosmetic bug in BSDI 4.x wchar.h; thanks to Thomas Wouters */
-# ifdef _HAVE_BSDI
-#  include <time.h>
-# endif
-#  include <wchar.h>
-#endif
-
 /* Py_UCS4 and Py_UCS2 are typedefs for the respective
    unicode representations. */
 typedef uint32_t Py_UCS4;
@@ -186,10 +175,6 @@ typedef uint8_t Py_UCS1;
 
 #endif /* Py_LIMITED_API */
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* --- Unicode Type ------------------------------------------------------- */
 
 #ifndef Py_LIMITED_API
@@ -2336,7 +2321,5 @@ PyAPI_FUNC(void) _PyUnicode_ClearStaticStrings(void);
 PyAPI_FUNC(int) _PyUnicode_EQ(PyObject *, PyObject *);
 #endif /* !Py_LIMITED_API */
 
-#ifdef __cplusplus
-}
-#endif
+COSMOPOLITAN_C_END_
 #endif /* !Py_UNICODEOBJECT_H */