[Qgis-user] QGIS 3.18.0 and QGIS 3.14.4 (LTR) packages released and OSGeo4W reboot

[Jürgen E. Fischer]

Hi Bo,

On Wed, 24. Feb 2021 at 10:52:32 +0100, Bo Victor Thomsen wrote:
> Den 23-02-2021 kl. 17:36 skrev Jürgen E. Fischer:
> > The new installer also doesn't require administrator privileges anymore.

> Jürgen, That is super duper good news !!
> 
> How did you manage this ? Will the osgeo4w installer not place any dll's in
> the windows\system32 directory anymore ?

The administrator rights were mainly necessary to install the MS runtimes - and
earlier we used a number of them, for a lot of packages didn't keep track
of which required which, therefore didn't surely know which one could be left
out.  The older ones and the newer one don't have to be installed, but
inbetween there where some in between did.

Now everything is built with one compiler (except GRASS) and requires only one
runtime, which doesn't require installation - just dropping the DLLs in is
enough.

But conflicting DLLs in system32 might still be an issue.  The installer only
addresses a few common ones like openssl and opencl - and if you need those,
you'll not get around running the installer elevated.

QGIS itself is less vulnerable to such issues as it uses
AddDllDirectory/SetDefaultDllDirectories to avoid system32's otherwise
prominent role.

Thinking of it, we might need to add that to crssync too - it inherited a lot
of indirect dependencies when GDAL/OGR became a core provider.


Jürgen

-- 
Jürgen E. Fischer           norBIT GmbH             Tel. +49-4931-918175-31
Dipl.-Inf. (FH)             Rheinstraße 13          Fax. +49-4931-918175-50
Software Engineer           D-26506 Norden            https://www.norbit.de
QGIS release manager (PSC)  Germany                    IRC: jef on FreeNode
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