[Help-gsl] Interpolation type with no re-compiling

[Mohammad Akhlaghi]

Hello,

In the interpolation section, the GSL manual says: "The interpolation 
types are interchangeable, allowing different methods to be used without 
recompiling":

https://www.gnu.org/software/gsl/doc/html/interp.html#d-interpolation-functions

But in the interpolation section, I couldn't find any environment 
variables to set the interpolation type without the need to recompile.

From the description, I was expecting it to be similar to environment 
variables that allow setting a random number generator and seed without 
compiling:

https://www.gnu.org/software/gsl/doc/html/rng.html#random-number-environment-variables

If I have missed it, could you please point me to the part of the manual 
that discusses how we can change the interpolation type without 
re-compiling?

Thank you very much,
Mohammad