pub unsafe extern fn dgesdd_(jobz: *const c_char,
m: *const lapack_int,
n: *const lapack_int,
a: *mut c_double,
lda: *const lapack_int,
s: *mut c_double,
u: *mut c_double,
ldu: *const lapack_int,
vt: *mut c_double,
ldvt: *const lapack_int,
work: *mut c_double,
lwork: *const lapack_int,
iwork: *mut lapack_int,
info: *mut lapack_int)