PR driver/69779: fix bogus cleanup code used by libgccjit affecting s390x

gcc/ChangeLog:
	PR driver/69779
	* gcc.c (driver::finalize): Fix cleanup of "specs".

From-SVN: r233385

gcc/ChangeLog

 2016-02-12  David Malcolm  <dmalcolm@redhat.com>
 
+	PR driver/69779
+	* gcc.c (driver::finalize): Fix cleanup of "specs".
+
+2016-02-12  David Malcolm  <dmalcolm@redhat.com>
+
 	PR driver/69265
 	PR driver/69453
 	* gcc.c (driver::driver): Initialize m_option_suggestions.

gcc/gcc.c

@@ -9954,8 +9954,20 @@ driver::finalize ()
   multilib_os_dir = 0;
   multiarch_dir = 0;
 
-  XDELETEVEC (specs);
-  specs = 0;
+  /* Free any specs dynamically-allocated by set_spec.
+     These will be at the head of the list, before the
+     statically-allocated ones.  */
+  if (specs)
+    {
+      while (specs != static_specs)
+	{
+	  spec_list *next = specs->next;
+	  free (const_cast <char *> (specs->name));
+	  XDELETE (specs);
+	  specs = next;
+	}
+      specs = 0;
+    }
   for (unsigned i = 0; i < ARRAY_SIZE (static_specs); i++)
     {
       spec_list *sl = &static_specs[i];