[WIP] rustc_llvm: use rust-bindgen to generate FFI bindings

src/bootstrap/compile.rs

@@ -153,6 +153,8 @@ pub fn std_cargo(build: &Build,
         features.push_str(" force_alloc_system");
     }
 
+    features.push_str(" rustc_llvm/rebuild_bindings");
+
     if compiler.stage != 0 && build.config.sanitizers {
         // This variable is used by the sanitizer runtime crates, e.g.
         // rustc_lsan, to build the sanitizer runtime from C code

src/librustc_llvm/Cargo.toml

@@ -10,12 +10,10 @@ path = "lib.rs"
 crate-type = ["dylib"]
 
 [features]
-static-libstdcpp = []
-
-[dependencies]
-bitflags = "1.0"
-rustc_cratesio_shim = { path = "../librustc_cratesio_shim" }
+rebuild-bindings = ["bindgen"]
 
 [build-dependencies]
-build_helper = { path = "../build_helper" }
+# https://github.com/rust-lang-nursery/rust-bindgen/pull/1162.
+bindgen = { git = "https://github.com/rust-lang-nursery/rust-bindgen.git", rev = "75f9e1c", optional = true }
 cc = "1.0.1"
+build_helper = { path = "../build_helper" }

src/librustc_llvm/archive_ro.rs

@@ -93,6 +93,7 @@ impl<'a> Iterator for Iter<'a> {
         if ptr.is_null() {
             ::last_error().map(Err)
         } else {
+            let ptr = ptr as *mut _;
             Some(Ok(Child {
                 ptr,
                 _data: marker::PhantomData,