[PATCH] cygwin: update child info magic

[Yaakov Selkowitz]

On 2016-02-12 11:18, Corinna Vinschen wrote:
> On Feb 12 10:53, Yaakov Selkowitz wrote:
>> On 2016-02-12 03:33, Corinna Vinschen wrote:
>>> On Feb 11 20:38, Yaakov Selkowitz wrote:
>>>> 	winsup/cygwin/
>>>> 	* child_info.h (CURR_CHILD_INFO_MAGIC): Update.
>>>
>>> This needs an explanation.  CHILD_INFO_MAGIC is still 0x30ea98f6U
>>> for me.
>>
>> Hmmm, in that case it's either one of the patches I just sent or it's gcc-5.
>> How would either of those affect this?
>
> Off the top of my head, I don't know.  Usually only a change to
> child_info.h should affect CHILD_INFO_MAGIC.  Unless the preprocessed
> output of gcc differs for some reason.

It turns out it does.  Anything that is substituted by preprocessor is 
placed on its own line with gcc-5, e.g. with NULL and _SYMSTR:

@@ -47340,7 +47636,11 @@
    char filler[4];
    child_info_fork ();
    void __attribute__((__stdcall__)) __attribute__ ((regparm (1))) 
handle_fork ();
-  bool abort (const char *fmt = __null, ...);
+  bool abort (const char *fmt =
+                               __null
+                                   , ...);
    void alloc_stack ();
  };

@@ -47422,6 +47722,14 @@

  extern "C" {
  extern child_info *child_proc_info;
-extern child_info_spawn *spawn_info asm ("_" "child_proc_info");
-extern child_info_fork *fork_info asm ("_" "child_proc_info");
+extern child_info_spawn *spawn_info asm (
+                                        "_"
+                                        "child_proc_info");
+extern child_info_fork *fork_info asm (
+                                      "_"
+                                      "child_proc_info");
  }

-- 
Yaakov