Platform issue on AIX, gcc error when build about ccs-pykerberos

[stevenpackardblp]

The following patches should allow the module to build on AIX and work well at run time. I can submit them in a pull request if they'd be accepted.

--- a/src/kerberospw.c
+++ b/src/kerberospw.c
@@ -131,24 +131,33 @@
     }
     if (result_code) {
         char *message = NULL;
-        bytes = asprintf(
-            &message, "%.*s: %.*s",
-            (int) result_code_string.length,
-            (char *) result_code_string.data,
-            (int) result_string.length,
-            (char *) result_string.data
-        );
-        if (bytes == -1)
-        {
-            PyErr_NoMemory();
+        int msgSz =
+            (int) result_code_string.length +
+            (int) result_string.length + 2 + 1; // as per format string + null term
+        message = (char *)malloc(msgSz);
+        if (message) {
+            int rc = snprintf(
+                message, msgSz, "%.*s: %.*s",
+                (int) result_code_string.length,
+                (char *) result_code_string.data,
+                (int) result_string.length,
+                (char *) result_string.data
+            );
+            if (rc > 0 && rc <= msgSz) {
+                PyErr_SetObject(
+                    PwdChangeException_class,
+                    Py_BuildValue("((s:i))", message, result_code)
+                );
+            }
+            else
+            {
+                PyErr_NoMemory();
+            }
+            free(message);
         }
         else
         {
-            PyErr_SetObject(
-                PwdChangeException_class,
-                Py_BuildValue("((s:i))", message, result_code)
-            );
-            free(message);
+            PyErr_NoMemory();
         }
         goto end;
     }

--- a/src/kerberosgss.c
+++ b/src/kerberosgss.c
@@ -34,6 +34,14 @@
 extern PyObject *GssException_class;
 extern PyObject *KrbException_class;

+#if defined(__xlC__) || defined(_AIX) || (defined(__SVR4) && defined(__sun))
+void *
+mempcpy (void *dest, const void *src, size_t len)
+{
+    return memcpy (dest, src, len) + len;
+}
+#endif
+
 char* server_principal_details(const char* service, const char* hostname)
 {
     char match[1024];