[Dune-devel] Dune with Visual Studio 2019 (16.2 Preview 2)

[Jö Fahlke]

Am So, 16. Jun 2019, 23:23:15 +0200 schrieb Christoph Grüninger:
> Dear fellow Dune developers,
> from time to time I yield to temptation checking how far I can trust
> Micrsoft's marketing regarding their talking about ongoing efforts to
> improve Visual C++ compiler [0]. They claim to support C++14, a fair
> share of C++17, and quite some C++20 [1]. Impressive.
> 
> == Summary ==
> * I can see a lot of improvements. The compiler is better, they
> integrated Git, CMake and Ninja into Visual Studio, and the installation
> is less bloated compared to older versions.
> * dune-common (libdunecommon) compiles fine
> * dune-grid fails with an internal compiler error while compiling
> onedgrid.cc for libdunegrid. I reported the issue.
> * tests for dune-common: all SIMD test fail, and the MPI tests due to
> min/max problem. Roughly 80% compile and run fine.

I'd be interested in some details about the SIMD tests if you still have them
(such as error messages).  Mostly to see whether they do something overly
non-conforming, or whether it is an implementation quirk we could easily cater
too.  (But I don't promise to commit much time to this...)

Regards,
Jö.

> * tests for dune-geometry: quadrature rules fail to compile
> * tests for dune-istl: two thirds pass, AMG tests fail with seg faults
> * tests for dune-localfunctions: only a third passed, three timeouts and
> 20 tests did not compile
> * without libdunegrid I did not try application modules like PDELab or DuMuX
> 
> So visible improvements compared to my last try two years ago [2].
> 
> But still, cmd is utter crap, the process is very slow (on bare metal
> building Dune on Windows feels like the computer is broken, within a
> virtual machine it is even worse) and the output is difficult to understand.
> 
> == Installation ==
> It is easy to install. I used VirtualBox, officially downloaded the
> latest Windows 10, used it with some old license key I usually have no
> use for, installed Visual Studio. It took me two evenings but most of
> the time it was a background task downloading and installing.
> I used the Community edition of Visual Studio 2019, version 16.2 preview
> 2. It can be used for personal use or to develop open source software.
> CMake, Git and Ninja are installed right away, when selecting the CMake
> feature.
> 
> == Building and using Dune ==
> The CMake integration did not work, I was not able to teach the Dune
> modules where to find dune-common. So I switched to the developer
> console, which is a cmd with the Visual Studio stuff preloaded. So Git
> and the Compile can be used right away.
> To allow for some ancient C++ stuff like "and" and "not" (instead of &&,
> !), you have to pass /permissive-. To get the latest C++ version without
> considering compatibility to older Visual C++ version, /std:c++latest
> must be added. I had some linker issue, by passing /EHsc I could move
> on. Further, Dune's C++ version detection failed, so I did that manually.
> Then I had to pass the dune-common_DIR. All together I called
> dune-geometry with these CMake arguments:
> 
> -DCMAKE_CXX_FLAGS="/permissive- /std:c++latest /EHsc"
> -DDISABLE_CXX_VERSION_CHECK=true -DCXX_MAX_SUPPORTED_STANDARD=17
> -Ddune-common_DIR=C:\Dune\dune-common\build-cmake
> -T "Visual Studio 16 2019"
> 
> I don't know which build tool I ended up, devenv or MSBuild. I built
> Dune with
>   cmake --build .
> and
>   cmake --build . --target build_tests
> I executed the tests with
>   ctest -j4 -C Debug
> 
> Bye
> Christoph
> 
> [0]
> https://docs.microsoft.com/en-us/cpp/overview/visual-cpp-language-conformance?view=vs-2019
> [1]
> https://docs.microsoft.com/en-us/cpp/overview/cpp-conformance-improvements?view=vs-2019
> [2]
> https://lists.dune-project.org/pipermail/dune-devel/2017-November/002301.html
> 
> -- 
> Nous vivons une époque où les pizzas arrivent plus vite que la police.
> [Claude Chabrol]
> 
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-- 
Jorrit (Jö) Fahlke, Institute for Computational und Applied Mathematics,
University of Münster, Orleans-Ring 10, D-48149 Münster
Tel: +49 251 83 35146 Fax: +49 251 83 32729

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