[QGIS-Developer] Building QGIS with Visual Studio 2019 CE and vcpkg

[i-s-o]

I am very interested in trying out your solution. Could you share the
required steps?

Thx.

On Fri, Jan 29, 2021, 09:25 Uhrig, Stefan <stefan.uhrig at sap.com> wrote:

> TL;DR: It is currently possible to build the QGIS core app with Visual
> Studio 2019 and vcpkg, which makes debugging QGIS dependencies easy.
>
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> Hi all,
>
>
>
> Some time ago I discovered vcpkg (https://github.com/microsoft/vcpkg).
> vcpkg is a package manager that downloads package source code to your local
> machine and builds the package locally. Recently, I discovered that vcpkg
> should be able to provide all dependencies to build at least the QGIS core
> application. Hence, I gave it a try.
>
>
>
> Basically, it worked out of the box. I started with a fresh Windows 10
> installation, installed Visual Studio 2019 Community Edition, Git, vcpkg,
> Python 3 and flex and bison for Windows. I fetched all other dependencies
> via vcpkg. It was not necessary to even touch a single file in the
> repository. I could just open the main CMakeLists.txt file in Visual Studio
> and only had to tweak the CMake cache (the CMake find macros that come with
> QGIS are not aware of vcpkg, so I had to set some paths manually). I had to
> switch off some extensions though as the required dependencies were not
> available via vcpkg (WITH_BINDINGS, WITH_QGIS_PROCESS, WITH_QTWEBKIT). The
> build did not report any errors, I could start the application and it seems
> to work, but I did some light testing only.
>
>
>
> I mainly tried it because I enjoy debugging with Visual Studio more than
> with gdb (or gdb wrapped in some IDE). In my experience, the performance of
> the Visual Studio debugger is better and it is more stable, especially in
> long debug sessions.
>
>
>
> I don’t want to promote official building support of QGIS with vcpkg.
> Providing the dependencies via OSGeo4W is much more reliable. However, if
> you don’t mind the experimental nature of this setup and you want to be
> able to debug into QGIS’ dependencies, you might give it a try. Especially,
> if you want to track the cause of a crash in one of QGIS’ dependencies,
> this setup might be helpful. You have the source code and debug versions of
> the dependencies, so the debugger will jump to the crashing code line and
> you can inspect all the variables of the dependency.
>
>
>
> If someone is interested in trying it, give me a note. I can then assemble
> detailed instructions on how to make it work. It took me a while to figure
> out which packages are needed and how the CMake cache needs to be tweaked.
>
>
>
> Best regards,
>
> Stefan
>
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