pub unsafe extern fn dbdsvdx_(uplo: *const c_char,
jobz: *const c_char,
range: *const c_char,
n: *const lapack_int,
d: *const c_double,
e: *const c_double,
vl: *const c_double,
vu: *const c_double,
il: *const lapack_int,
iu: *const lapack_int,
ns: *mut lapack_int,
s: *mut c_double,
z: *mut c_double,
ldz: *const lapack_int,
work: *mut c_double,
iwork: *mut lapack_int,
info: *mut lapack_int)