pub unsafe extern "C" fn nmmin(
n: c_int,
Bvec: *mut c_double,
X: *mut c_double,
Fmin: *mut c_double,
_fn: optimfn,
fail: *mut c_int,
abstol: c_double,
intol: c_double,
ex: *mut c_void,
alpha: c_double,
bet: c_double,
gamm: c_double,
trace: c_int,
fncount: *mut c_int,
maxit: c_int,
)