[Development] Problems building 6.11.0 on windows

[Philippe]

Probably not the same reason, but I also had a problem building Qt
6.11.0 on Windows. In my case, this was a linker error when building Qt6MultimediaQuick

I could solve the problem by NOT using -ltcg (link time code
optimization).

I have been using  -ltcg for many years without any problem, but with
the latest MSVC 2022 build and Qt 6.11.0, -ltcg removed too much stuff.

Philippe


On Fri, 3 Apr 2026 04:49:31 +0000
Scott Bloom <scott at towel42.com> wrote:

> Ill re-run the configure, but there was nothing after the warning.
> 
> I finally gave up on building webview and the other web (only built webchannel) but I still got that message.
> 
> Its almost as if the logic is setup to assume there is a problem in the dependencies and it writes out the header even when there are no dependencies missing.
> 
> Scott
> 
> -----Original Message-----
> From: Development <development-bounces at qt-project.org> On Behalf Of Thiago Macieira
> Sent: Thursday, April 2, 2026 19:38
> To: development at qt-project.org
> Subject: Re: [Development] Problems building 6.11.0 on windows
> 
> On Thursday, 2 April 2026 12:42:13 Pacific Daylight Time Scott Bloom wrote:
> > However, configure still reports "WARNING: Qt WebEngine And Qt Pdf 
> > SBOM generation will be skipped due to missing dependencies."
> > 
> > However nothing is listed below.  I have attached the config.summary.
> 
> The summary is too short. Please include the full output of CMake.
> 
> Do you have a legal requirement to generate the SBOM? If not, you can just ignore that warning.
> 
> If you do have a requirement, that message is coming from qtwebengine/ configure.cmake, near the bottom. And you should see it prints a message of what is missing: either Python is missing or (I'm guessing) some module that SBOM requires.
> 
> --
> Thiago Macieira - thiago.macieira (AT) intel.com
>   Principal Engineer - Intel DCG - Platform & Sys. Eng.
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