pub unsafe extern fn ctbcon_(norm: *const c_char,
uplo: *const c_char,
diag: *const c_char,
n: *const lapack_int,
kd: *const lapack_int,
ab: *const lapack_complex_float,
ldab: *const lapack_int,
rcond: *mut c_float,
work: *mut lapack_complex_float,
rwork: *mut c_float,
info: *mut lapack_int)