bpo-26836: Add ifdefs for all MFD_HUGE* constants (GH-13666)

https://bugs.python.org/issue26836

Modules/posixmodule.c

@@ -14046,19 +14046,47 @@ all_ins(PyObject *m)
     if (PyModule_AddIntMacro(m, MFD_ALLOW_SEALING)) return -1;
 #ifdef MFD_HUGETLB
     if (PyModule_AddIntMacro(m, MFD_HUGETLB)) return -1;
+#endif
+#ifdef MFD_HUGE_SHIFT
     if (PyModule_AddIntMacro(m, MFD_HUGE_SHIFT)) return -1;
+#endif
+#ifdef MFD_HUGE_MASK
     if (PyModule_AddIntMacro(m, MFD_HUGE_MASK)) return -1;
+#endif
+#ifdef MFD_HUGE_64KB
     if (PyModule_AddIntMacro(m, MFD_HUGE_64KB)) return -1;
+#endif
+#ifdef MFD_HUGE_512KB
     if (PyModule_AddIntMacro(m, MFD_HUGE_512KB)) return -1;
+#endif
+#ifdef MFD_HUGE_1MB
     if (PyModule_AddIntMacro(m, MFD_HUGE_1MB)) return -1;
+#endif
+#ifdef MFD_HUGE_2MB
     if (PyModule_AddIntMacro(m, MFD_HUGE_2MB)) return -1;
+#endif
+#ifdef MFD_HUGE_8MB
     if (PyModule_AddIntMacro(m, MFD_HUGE_8MB)) return -1;
+#endif
+#ifdef MFD_HUGE_16MB
     if (PyModule_AddIntMacro(m, MFD_HUGE_16MB)) return -1;
+#endif
+#ifdef MFD_HUGE_32MB
     if (PyModule_AddIntMacro(m, MFD_HUGE_32MB)) return -1;
+#endif
+#ifdef MFD_HUGE_256MB
     if (PyModule_AddIntMacro(m, MFD_HUGE_256MB)) return -1;
+#endif
+#ifdef MFD_HUGE_512MB
     if (PyModule_AddIntMacro(m, MFD_HUGE_512MB)) return -1;
+#endif
+#ifdef MFD_HUGE_1GB
     if (PyModule_AddIntMacro(m, MFD_HUGE_1GB)) return -1;
+#endif
+#ifdef MFD_HUGE_2GB
     if (PyModule_AddIntMacro(m, MFD_HUGE_2GB)) return -1;
+#endif
+#ifdef MFD_HUGE_16GB
     if (PyModule_AddIntMacro(m, MFD_HUGE_16GB)) return -1;
 #endif
 #endif