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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Compilation problems with latest MSVC
Date: Sun, 31 Dec 2006 06:24:27 +0200
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> Date: Sun, 31 Dec 2006 00:13:18 +0000
> From: Jason Rumney <jasonr@gnu.org>
> Cc: drobinow@gmail.com, emacs-devel@gnu.org
> >
> I suspect that the single threaded library is required for Emacs, as
> the multithreaded library will be allocating heap memory for each
> thread behind your back to avoid problems with global variables, so
> there will always be a conflict between Emacs's and the C library's
> malloc routines.

Alas, there's no single-threaded library that comes with VS 2005: they
removed it.  The docs says "use the multithreaded library instead".
So it sounds like all later versions of MSVC will have this problem.