Re: MS-Windows build using Posix configury

[Dmitry Gutov <dgutov@yandex.ru>]

On 18.05.2013 22:21, Eli Zaretskii wrote:
>> Date: Sat, 18 May 2013 18:28:15 +0400
>> From: Dmitry Gutov <dgutov@yandex.ru>
>> CC: emacs-devel@gnu.org
>>
>>>>> Anyway, can you verify that the function unload_dlls is being called
>>>>> at exit, and that it does unload libgnutls-28.dll?  Setting a
>>>>> breakpoint at the line that calls FreeLibrary should allow you to
>>>>> display the value of loaded_from variable, which is a list showing the
>>>>> library and the handle used to load it.
>>>>
>>>> It does, but 'abort' breakpoint hits earlier.
>>>>
>>>> The sequence is, as gdb sees it, unload libpng14-14.dll, abort from
>>>> deregister_frame_info_bases, unload libpng14-14.dll again (!), then
>>>> unload libgnutls-28.dll.
>>>
>>> Does libpng14-14.dll depend on libintl as well, or depend on
>>> libgcc_s_dw2-1.dll in some other way, per chance?
>>
>> Nope, its only dependencies are zlib1, kernel32 and msvcrt.
>
> OK.  Can you try a session that only loads libgnutls, but doesn't load
> image libraries?  I think "emacs -nw" should achieve that, if you then
> use whatever features that load GnuTLS.  The question is, if libgnutls
> is the only DLL loaded, does Emacs still crash at exit, with and
> without my unloading patch?

I've only tried it with your patch, for now, launching and then quitting 
Gnus in console Emacs, but it still crashes.

It looks to me that libpng gets loaded by Gnus anyway, because a) the 
breakpoint on w32.c:7473 still gets hit, the same amount of times, and 
the car of 'loaded_from' on the first hit is still "libpng14-14.dll", b) 
'M-x list-dynamic-libraries' crashes with (wrong-type-argument 
characterp "J:\\Apps\\System\\MinGW\\bin\\libpng14-14.dll") after Gnus 
has been launched, just like it does in graphical environment.