pub unsafe extern fn dhseqr_(job: *const c_char,
compz: *const c_char,
n: *const lapack_int,
ilo: *const lapack_int,
ihi: *const lapack_int,
h: *mut c_double,
ldh: *const lapack_int,
wr: *mut c_double,
wi: *mut c_double,
z: *mut c_double,
ldz: *const lapack_int,
work: *mut c_double,
lwork: *const lapack_int,
info: *mut lapack_int)