Thank You, Now I have the big picture ;-)
Wojtek
----- Original Message -----
From: Serge Lages
To: OpenSceneGraph Users
Sent: Thursday, December 13, 2007 4:35 PM
Subject: Re: [osg-users] [SPAM] Re: Latest SVN: problems with
PluginswithoutManifests
Hi Wojtek,
On Dec 13, 2007 4:11 PM, Wojciech Lewandowski <[EMAIL PROTECTED]> wrote:
Roger,
I totally agree with you that manifests should probably stay in plugins. I
made my research out of curiosity.
I may add that indeed this mechanism looks like you described. Its
interesting though that problem does disappear only if the executable loaded
MSVCRT DLLs. If they were not loaded by exe but instead loaded later in DLL
loading cascade - problem still remained. That was the case with our original
app. Exe was built with static linking. It was loading our aditional DLL
modules dynamically (through LoadLibrary). These module were using the same
shared MSVCRT DLL libs and OSG libs as OSG Plugins. So when these modules
loaded, proper MSVCRT DLLs were loaded as well. But even after loading these
modules attempts to read some media with osgDB plugins produced error messages.
On a side note, I have problems in understanding why removing manifest from
plugins could save users time if main libs were still built with manifests
embeded and thus we sitll got the dependecy. Of course its feasible to build
some application using former version of OSG and former MSVCRT and later update
OSG plugins only. But who would do this ? It seems highly rare and unprobable
in practice. But heck, what do I know ? People do so many strange things with
computers these days ;-)
Removing manifest helps when you want to redistribute an OSG application
without asking to the users to install the MS redistributable package. Removing
it from the plugins and not the core dlls is done because the plugins are
distributed into a separated folder, if you don't remove the manifests, you
have to put in each folders where dlls are located a copy of the CRT dlls,
without manifests, you only need to put the CRT dlls into the executable
folder.
Of course it's not a common usage, that's why now the manifests are build by
default. :)
But I suspect that such Plugins in some way would still depend on MSVCRT
lib which was used to build them. If they would work that would be great, but
if they would crash no one would be able to find that the reason that was
incompatibilty in runtime libs (back to the DLL hell ;-).
Regards,
Wojtek
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