[Dune-devel] CMake with Visual Studio / Windows

[Christoph Grüninger]

Hi,
it's me again, back from Windows. I tried to use Visual Studio 
2013
together with Clang 3.5.0 as the latter gained some Windows
compatibility.

== Tl;dr ==
Clang does not yet support try and throw. Thus I was not able 
to
compile dune-common. Maybe one could patch it out, but yeah, 
you
name it.
So I am still lacking a functioning compiler on Windows. I'll 
retry
with Clang 3.6 and/or Visual Studio 2014. Microsoft 
implemented
already a host of C++11 features and even some C++14 ones.

== Lessons learned ==
I write them down so they won't get lost.
- With -T <toolchain> the user can select a toolchain. So it 
will
   still use Visual Studio as the build system, but use Clang 
or
   the Intel compiler. The <toolchain> is a string that is 
difficult
   to guess and I could not find it in the CMake 
documentation.
   Examples are "LLVM-vs2012" and "Intel C++ Compiler XE 
12.1".
- Clang offers a wrapper that behaves similar to Microsoft's
   compiler cl.exe. The wrapper is called clang-cl.exe. No 
flag is
   needed to use the C++11 mode.
- You have to make sure that the environment is configured to
   locate the Visual Studio headers and such. Otherwise weired
   error occur. You can either open a cmd that has the stuff
   preloaded. You can find it in the Start menu > Programs >
   Visual Studio > Other Visual Studio tool > select the right 
cmd.
   Or you can call Visual Studio's vcvarsall.bat script, that 
does
   the same.
- With cmake --build <path> the build tool can be invoked. 
This
   is more general than "make" as it works for ninja-build and
   Visual Studio as well. With that one can compile in the 
command
   windown without switching to the IDE.

So far
Christoph

P.S.: For German-speaking people it is obvious why Windows 9 
([nein])
will be skipped.