this is not so much a question about how to do things but why things are done in a specific way… I have this little code that fits angular distribution and it uses wigner 3j and 6j symbols. Having spent the morning preparing the data I load my fitting code with .L …+. No errors. I then prepare the fit with some commands specific to the code. No problems. Then I tell it to fit, and BANG, my code calls the wigner functions… Root exits with
root.exe: symbol lookup error:TGammaDistribution_cxx.so: undefined symbol: _ZN4ROOT4Math9wigner_3jEiiiiii
destroying this mornings work. I know why, I know how to fix this using gSystem->Load etc but this time I forgot and hence lost the work of this morning. I also know I should have saved the histograms before fitting and all of the good advice we have to give our younger colleagues because root has a habit of crashing one way or the other during a day of work.
But why do I have to have this problem? Why is MathMore excluded from ROOT auto load facilities? Of course I can put this into a .rootlogon.C etc but then I work on another computer and I will forget again etc…
So, to sum it up, why do I have to worry about loading MathMore?
Maybe root could handle a symbol lookup error with more grace?
_Compiler:g++ (GCC) 8.1.1 20180712 (Red Hat 8.1.1-5)