I downloaded the acml 4.4.0 from the website, but when i try to make:
gfortran -m64 driver.f -L/opt/acml4.4.0/gfortran64_mp/lib -lacml
gfortran: driver.f: No such file or directory
Assuming you are executing the command in a folder that does contain driver.f, you might have a path problem. Try using ./driver.f. This is not an acml issue.