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Date: Thu, 29 Sep 2011 09:48:00 -0000
From: Eli Zaretskii <eliz@gnu.org>
Subject: Re: [RFC] Crash sourcing Python script on Windows
In-reply-to: <CAEwic4ZssZHUpX6QxFq5hjGv6Nrpm5RspMNfmA4Jv6v9cqN0hg@mail.gmail.com>
To: Kai Tietz <ktietz70@googlemail.com>
Cc: brobecker@adacore.com, maillist-gdbpatches@barfooze.de, gdb-patches@sourceware.org
Reply-to: Eli Zaretskii <eliz@gnu.org>
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References: <1317251996-12146-1-git-send-email-brobecker@adacore.com> <09787EF419216C41A903FD14EE5506DD03098D555B@AUSX7MCPC103.AMER.DELL.COM> <4E83D440.6000702@barfooze.de> <20110929040634.GD19246@adacore.com> <83ty7verow.fsf@gnu.org> <CAEwic4ZssZHUpX6QxFq5hjGv6Nrpm5RspMNfmA4Jv6v9cqN0hg@mail.gmail.com>
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> Date: Thu, 29 Sep 2011 10:38:51 +0200
> From: Kai Tietz <ktietz70@googlemail.com>
> Cc: Joel Brobecker <brobecker@adacore.com>, maillist-gdbpatches@barfooze.de, 
> 	gdb-patches@sourceware.org
> 
> The issue here is not the definition of the FILE type itself in this
> case.  The problem is that python (if built with VC) uses different
> runtime-version (msvcr100.dll or lower), but mingw uses by well know
> reasons the msvcrt.dll.  So by loading this python-DLL into a
> mingw-built executable, we have two different runtimes at the same
> time.

Thanks, this makes sense.

What are the reasons that we build GDB against msvcrt.dll?

> By the way, the same issue can lead also for different C-runtime
> functions pretty funny results.

Exactly.  If we have such an incompatibility once python's DLL is
loaded, it can lead to similar crashes elsewhere.  So, unless we can
find a way of linking against msvcrNNN.dll or build our own Python
with MinGW, it sounds like using Python on Windows is unsafe?