Function zgemm_

pub unsafe extern "C" fn zgemm_(
    transa: *const f77_char,
    transb: *const f77_char,
    m: *const f77_int,
    n: *const f77_int,
    k: *const f77_int,
    alpha: *const dcomplex,
    a: *const dcomplex,
    lda: *const f77_int,
    b: *const dcomplex,
    ldb: *const f77_int,
    beta: *const dcomplex,
    c: *mut dcomplex,
    ldc: *const f77_int,
)