pub unsafe extern "C" fn cblas_dgemv(
layout: CBLAS_LAYOUT,
transa: CBLAS_TRANSPOSE,
m: c_int,
n: c_int,
alpha: c_double,
a: *const c_double,
lda: c_int,
x: *const c_double,
incx: c_int,
beta: c_double,
y: *mut c_double,
incy: c_int,
)