[mythtv] Win32 builds with QT4 - query

[Arnon Meshoulam (arnonm)]

Andrei,

Great progress. Thanks for pointing us in the right direction. I have been
trying to find a way to progress this and have been stuck. In the process, I
have got mythtv on Eclipse on Win32, but no solution. I hope this will point
us there. BTW, have you looked at OllyDbg? It might help if you know what
you are looking for.

Arnon




> **
> ------------------------------
>  > This is the error that is reported IMMEDIATELY on startup: ( there is
> > no stacktrace or any information from GDB - any help with this would
> > be appreciated!)
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > Program exited with code 030000000005.
> >
> > (it happens on all .exe's EXCEPT mtd.exe )
>
> The problem happens apparently, in a constructor of some global static
> object, which is supposed to be executed before main(), that's why GDB is
> helpless. The problem might be worse (probably is since this only happens
> on
> Windows), because "on Windows constructors are not executed for global
> static data placed in dlls" (see reference below).
>
> So far, I traced the problem to libmythtv. See attachment - unpack it under
>
> "programs" and build it, it will run fine, dumping the standard
> initialization stuff to console and silently exiting. However, as soon as
> you uncomment line 102 ("ProgramInfo pi;"), this will link the executable
> to
> libmythtv and it will start experiencing the symptoms.
>
> This article: http://www.kdedevelopers.org/node/2889 describes exactly the
>
> same issue and offers a solution, the only problem is how to find out where
>
> to apply this solution to. This one helps understand the issue too:
> http://www.microsoft.com/msj/0297/c/c0297.aspx
>
> Can somebody help figuring out what these global objects are? So far, using
>
> the method from the first article, I found that constructors are called for
>
> SSDPCache in upnp.cpp:23, and an array of QTextCodec's "static const
> QTextCodec *iso8859_codecs[16];" in dvbdescriptors.cpp:11, but neither
> seems
> to be responsible.
> The method in the article is only good for finding objects inheriting from
> something common (QObject, in this case), so the scope of the search was
> very limited.
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