[Qt-interest] redistribute QT application for Windows

[Malyushytsky, Alex]

>> Also, if you put those DLLs in your app's folder, and Microsoft issues a
security update for the system-wide DLLs through Windows Update, your
app will stay buggy since it's using your bundled DLLs and not the
system global, updated DLLs.

Your application may stop working after such updates.
This is a reason a lot of applications are deployed with such dlls in application folder.
In fact Microsoft office on my computer has MSVCR71.DLL for one of the addons it provides.

What to do is a personal choice.
But you can deploy C runtime libraries or any other libraries from the redistributable package independently with your application without breaking any license.

That was my point.

Regards,
   Alex



-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Nikos Chantziaras
Sent: Wednesday, April 21, 2010 2:59 PM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] redistribute QT application for Windows

On 04/21/2010 02:23 PM, Serge wrote:
> Hello,
>
> i need to redistribute QT application, built in Visual Studio 2005.
> can i add to the folder with application VC runtime libraries:
> msvcr80.dll
> msvcp80.dll
> will i break some license agreement, providing these 2 libraries
> together with my program?
>
> Or i need to provide redistributable package vcredist_x86.exe from
> microsoft instead to avoid problems with license?
>
> Thank you!

That might be duplicating what the user already has on his system.
Also, if you put those DLLs in your app's folder, and Microsoft issues a
security update for the system-wide DLLs through Windows Update, your
app will stay buggy since it's using your bundled DLLs and not the
system global, updated DLLs.

Silently installing vcredist_x86.exe (it should have such a "silent"
option) is the best way.  It will only install the DLLs if they're not
already there, or if they're old and outdated, and it will not replace
them if they're newer.
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