Re: [Libmesh-users] How to avoid complex numbers?

[Hubert W. <hub...@gm...>]

Just to add on this out of curiosity: Due to the missing instantiation 
of NumericVector<Real> etc.
it will be even not possible to setup some custom `System`-type with 
double-variables, I guess?

Best regards
Hubert


On 8/23/21 3:02 PM, John Peterson wrote:
> On Mon, Aug 23, 2021 at 7:53 AM edgar <edg...@cr...> wrote:
>
>> Hi Hubert!
>>
>> Thanks. It seems that the option which you are sending is for the
>> overall libMesh compilation (correct me if I'm wrong). I am interested
>> in having my libMesh with the ability to process complex numbers, and
>> just compiling a specific program (not the whole libMesh) without
>> complex numbers. Do you know if there is a way for that? Thank you
>> again.
>>
> The decision to use complex numbers is a compile-time one. If your program
> links against a libmesh with complex numbers enabled, then the Number type
> is #defined to be std::complex<double>. Furthermore certain libmesh
> templates, in particular the NumericVector and SparseMatrix classes are
> only instantiated for type Number, so these will all use
> std::complex<double> internally in such builds.
>