Remove return int types from BLAS/LAPACK functions.
The int return types are non-standard, mainly introduced by f2c. This causes conflicts when loading Eigen BLAS in packages like SuiteSparse, which may also have their own blas declarations.
Removed extraneous ftlen
arguments introduced by f2c, which also
cause conflicts due to symbol mismatches compared to standard BLAS.
Edited by Antonio Sánchez