Function gsl_sys::gsl_bst_alloc

pub unsafe extern "C" fn gsl_bst_alloc(
    T: *const gsl_bst_type, 
    allocator: *const gsl_bst_allocator, 
    compare: gsl_bst_cmp_function, 
    params: *mut c_void
) -> *mut gsl_bst_workspace

This is supported on crate feature v2_6 only.