Re: [Cppqed-support] Eigen

[Raimar S. <rai...@ui...>]

Done.

Best regards
Raimar

On Tuesday, November 19, 2013 03:06:30 PM Andras Vukics wrote:
> Hi Raimar,
> Thanks, that sounds straightforward indeed.
>  Please keep the feature branch, since there is one point left to take care
> of: Eigen::Matrices can adopt previously allocated data through Eigen::Map
> obejcts with the funny ’new’ syntax that you see exemplified in
> GeneralDickeImaginaryEvolution. They will still try to free this chunk of
> memory when they get destructed, so one has to make sure that they readopt
> their original data before running out of scope … (That’s why you see two
> pairs of ’new’ constructs in the script. At least, this is my present
> understanding.) This worked for me in some tests, but now in
> GeneralDickeImaginaryEvolution, when I do it for Eigen::Vector, it causes a
> crash with segmentation fault. (For Eigen::Matrix it’s still fine.)
> Best regards,
> András
> 
> 
> 
> On Tue, Nov 19, 2013 at 2:54 PM, Raimar Sandner
> 
> <rai...@ui...>wrote:
> > Dear András,
> > 
> > wow, that was quick!
> > 
> > #include <Eigen/Core> is definitely right. Eigen3 distributes a
> > FindEigen3.cmake, therefore find_package(Eigen3) will set all the required
> > variables and we only have to call
> > include_directories(Eigen3_INCLUDE_DIRS) in
> > order to have /usr/include/eigen3 in the include path (or whatever the
> > right
> > path is on the specific distribution).
> > 
> > I will update the cmake build system accordingly. Should I then already
> > merge
> > it to Development or leave it in the feature branch for now?
> > 
> > Raimar
> > 
> > On Tuesday, November 19, 2013 02:25:04 PM Andras Vukics wrote:
> > > Dear Raimar,
> > > I have now completed migration to Eigen3, and it seems to work fine. I
> > 
> > have
> > 
> > > pushed the feature branch named Eigen to SourceForge (only core &
> > > scripts
> > > affected).
> > > Could you please fetch the branch and update cmake such that it looks
> > > for
> > > Eigen3 instead of FLENS? If not found, DO_NOT_USE_EIGEN should be set.
> > > Two points to note:
> > > * EIGEN_NO_DEBUG should be set for release mode but the documentation of
> > > Eigen states that it gets set if NDEBUG is set, so in principle we do
> > > not
> > > need to care about this.
> > > * Under ARCH (and Ubuntu also, I think), Eigen3 gets installed under a
> > > directory called eigen3, so that the main include files can be pulled in
> > 
> > as
> > 
> > > #include <eigen3/Eigen/Core>
> > > for example. However, in the documentation they only use
> > > #include <Eigen/Core>
> > > It would be nice to have this latter, especially because this eigen3
> > > directory will not necessarily exist in all distributions. Hence, if
> > 
> > Eigen3
> > 
> > > is found, this eigen3 directory should be put into the include path.
> > > Thanks, with best regards,
> > > András
> > > 
> > > 
> > > Dr. Andras Vukics
> > > Institute for Theoretical Physics
> > > University of Innsbruck
> > 
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