bug#27579: intptr_t and uintptr_t

[Matt Wette]

I found the issue.   I called the symbol intptr_t in foreign.c and intptr in 
foreign.scm

Now both use intptr_t and uintptr_t, with patch below.

Matt

--- libguile/foreign.c-orig     2017-07-04 15:57:55.000000000 -0700
+++ libguile/foreign.c  2017-07-04 16:02:45.000000000 -0700
@@ -56,6 +56,8 @@
 SCM_SYMBOL (sym_size_t, "size_t");
 SCM_SYMBOL (sym_ssize_t, "ssize_t");
 SCM_SYMBOL (sym_ptrdiff_t, "ptrdiff_t");
+SCM_SYMBOL (sym_intptr_t, "intptr_t");
+SCM_SYMBOL (sym_uintptr_t, "uintptr_t");
 
 /* that's for pointers, you know. */
 SCM_SYMBOL (sym_asterisk, "*");
@@ -1248,6 +1250,26 @@
 #endif
              );
 
+  scm_define (sym_intptr_t,
+#if SCM_SIZEOF_INTPTR_T == 8
+             scm_from_uint8 (SCM_FOREIGN_TYPE_INT64)
+#elif SCM_SIZEOF_INTPTR_T == 4
+             scm_from_uint8 (SCM_FOREIGN_TYPE_INT32)
+#else
+# error unsupported sizeof (scm_t_intptr)
+#endif
+             );
+
+  scm_define (sym_uintptr_t,
+#if SCM_SIZEOF_UINTPTR_T == 8
+             scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64)
+#elif SCM_SIZEOF_UINTPTR_T == 4
+             scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32)
+#else
+# error unsupported sizeof (scm_t_uintptr)
+#endif
+             );
+
   null_pointer = scm_cell (scm_tc7_pointer, 0);
   scm_define (sym_null, null_pointer);
 }
--- module/system/foreign.scm-orig      2017-07-04 16:06:15.000000000 -0700
+++ module/system/foreign.scm   2017-07-04 16:44:27.000000000 -0700
@@ -30,6 +30,7 @@
             uint16 int16
             uint32 int32
             uint64 int64
+            intptr_t uintptr_t
 
             sizeof alignof