bump version, fix c++ stdlib bindgen (un)support

Author: Montana Low

xgboost-sys/Cargo.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 libc = "0.2"
 
 [build-dependencies]
-bindgen = "0.68"
+bindgen = "0.69"
 cmake = "0.1"
 
 [features]

xgboost-sys/README.md

@@ -3,4 +3,4 @@
 FFI bindings to [XGBoost](https://xgboost.readthedocs.io/), generated at compile
 time with [bindgen](https://github.com/rust-lang-nursery/rust-bindgen).
 
-Currently uses XGBoost v0.81.
+Currently uses XGBoost v2.0.

xgboost-sys/build.rs

@@ -50,6 +50,7 @@ fn main() {
 
     let bindings = bindgen::Builder::default()
         .header("wrapper.h")
+        .blocklist_item("std::.*")// stdlib is not well supported by bindgen
         .clang_args(&["-x", "c++", "-std=c++11"])
         .clang_arg(format!("-I{}", xgb_root.join("include").display()))
         .clang_arg(format!("-I{}", xgb_root.join("rabit/include").display()))