Is sparse BLAS not included in BLAS?

Question

I have a working LAPACK implementation and that, as far as I read, contains BLAS.

I want to use SPARSE BLAS and as far as I understand this website, SPARSE BLAS is

Answer 1

It seems that g++ does not find the required header files. So you need to add

-I path_to_header_files/ 

to the command line arguments. I.e, the directory where you copied blas_sparse.h to your working directory.