Dear Paolo, >> FCFLAGS="-qfree=f90 -C -g -qnosmp" > > options -C -g and no optimization? You have a big cpu grant.
As I already wrote, I have no idea on these parameters, they are copied from various sources to get the compilation working without any errors... Do you refer to cpu-usage when executing make or cpu-usage of the compiled quantum espresso? >> Or is the priority the other way round? > > it is: libraries are loaded in the order they are listed But this would mean, in -L/gpfs/usrurz/lib64 -llapack /gpfs/home/aasfu/espresso-4.3.1/lapack-3.2/lapack.a all (optimized) functions from /gpfs/usrurz/lib64/llapack.a would be overwritten by the functions from espresso/lapack? Or is the implementation, that existing functions are not overwritten/redefined? >> Also I wonder, why BLAS_LIBS is empty > > BLAS (and part of LAPACK) are contained in essl. ON IBM machines > you should use essl as much as you can What does this mean? That an empty BLAS_LIBS is fine? Where/How can I suggest more usage of essl? Thanks a lot, Guntram
