pub unsafe extern "C" fn dlagv2_(
a: *mut c_double,
lda: *mut c_int,
b: *mut c_double,
ldb: *mut c_int,
alphar: *mut c_double,
alphai: *mut c_double,
Rf_beta: *mut c_double,
csl: *mut c_double,
snl: *mut c_double,
csr: *mut c_double,
snr: *mut c_double,
)