[Dune] A couple of CMake questions

[Oliver Sander]

Hi,
thanks for these answers.  Can they be added to Dominics cmake faq?
Thanks!
Oliver

Am 02.07.2015 um 12:03 schrieb Christoph Grüninger:
> Hi Robert,
> I answer on the mailing list, as my answers might be of wider interest.
> 
> 
>> 1) config.h.cmake sollte beim generieren anders benannt werden, weil es
>> einen Konflikt mit in-source builds gibt. Dabei wird das config.h.cmake
>> überschrieben. Das sollte man ändern.
> 
> Are there people using in-source builds? Ok, then have a look at
> feature/config.h.cmake-insource
> 
>> 2) Was ist das Äquivalent zu configure --help, also eine Funktion die
>> mir sagt, was es alles für Optionen gibt, nämlich alle parameter die mit
>> der cmake Funktion optional eingebaut wurden.
> 
> There is nothing comparable to configure --help. The closest you can get is:
> - use ccmake, it is a gui and shows you all configure options. You can
> edit them there and re-run cmake.
> - pass -LH to cmake, then it will print all variables after configuration.
> 
> 
>> 3) Wenn ich --disable-documentation angebe wird z.B. trotzdem Latex
>> angeworfen und einige Sachen generiert. Ich habe die variable USE_LATEX
>> optinal gemacht, damit ich das wenigstens abschalten kann ohne die CMake
>> files zu ändern.
> 
> I think disabling the documentation was never supported with CMake. I
> think it is never build unless you call make doc.
> Anyway, since yesterday CMake tells me that my LaTeX is broken. I have
> to investigate this.
> You should open a flyspray task about disabling the documentation.
> 
>> 4) Was ist die vorgesehene Verwendung von dunecontrol? --with-blablabla
>> oder CMAKE_FLAGS="-Dblablabla" ? Wie baue ich eine neue Option ein?
> 
> That depends on who you ask. I always tell people to change their whole
> opts file to the CMAKE_FLAGS=-Dblabla style. The other one is a
> compatibily offer that will vanish after Dune 2.4.
> Have a look at dune-common/lib/dunecommonam2cmake.lib and similar files
> in other modules. This is the place where translation can be added.
> 
>> 5) Wenn ich DuneEnableAllPackages verwende, dann sollten alle flags für
>> alle targets automatisch gesetzt sein, richtig?
> 
> Yes. Quoting the documentation:
>   Adds all flags and all libraries to all executables that are
>   subsequently added in the directory from where this function
>   is called and from all its subdirectories (recursively).
> Please have a look into the documentation to see how to use it properly.
> Did you have any problems with this macro?
> 
> Bye
> Christoph
> 
> 
> 
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