Add macros for checking for long double and defining the size of long double...

Add macros for checking for long double and defining the size of long double on the platform.  Ctypes and Struct module will both need them.

configure.in

@@ -1197,6 +1197,18 @@ if test "$have_long_long" = yes ; then
 AC_CHECK_SIZEOF(long long, 8)
 fi
 
+AC_MSG_CHECKING(for long double support)
+have_long_double=no
+AC_TRY_COMPILE([], [long double x; x = (long double)0;], [
+  AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define this if you have the type long double.]) 
+  have_long_double=yes
+])
+AC_MSG_RESULT($have_long_double)
+if test "$have_long_double" = yes ; then
+AC_CHECK_SIZEOF(long double, 16)
+fi
+
+
 AC_MSG_CHECKING(for _Bool support)
 have_c99_bool=no
 AC_TRY_COMPILE([], [_Bool x; x = (_Bool)0;], [

pyconfig.h.in

@@ -330,6 +330,9 @@
 /* Define to 1 if you have the <linux/netlink.h> header file. */
 #undef HAVE_LINUX_NETLINK_H
 
+/* Define this if you have the type long double. */
+#undef HAVE_LONG_DOUBLE
+
 /* Define this if you have the type long long. */
 #undef HAVE_LONG_LONG
 
@@ -824,6 +827,9 @@
 /* The size of `long', as computed by sizeof. */
 #undef SIZEOF_LONG
 
+/* The size of `long double', as computed by sizeof. */
+#undef SIZEOF_LONG_DOUBLE
+
 /* The size of `long long', as computed by sizeof. */
 #undef SIZEOF_LONG_LONG