If you want to use a computational library on a high-performance computing center where you have no root access to install new software you can use header-only template libraries such as MTL4, Eigen3, ...
I don't want to deal with virtualenv for a local Python installation, I just want to install a few packages locally without dealing with the PYTHONPATH environment ...
How do I configure PETSc to run long double precision or some other precision that is greater than default?
I'm installing PETSc for complex numbers with C99 standard. I'd like to have it installed using a higher precision than default (double, I presume) since that will most likely make the LU ...