Merge pull request #101 from ishitatsuyuki/sigill-fix

Fix SIGILL on nightly rustc (+ Introduces fallback crate as an interim workaround for backward compatibility)

Author: erlepereira

x11-dl/Cargo.toml

@@ -15,6 +15,7 @@ workspace = ".."
 [dependencies]
 lazy_static = "1"
 libc = "0.2"
+maybe-uninit = "2.0.0"
 
 [build-dependencies]
 pkg-config = "0.3.8"

x11-dl/src/lib.rs

@@ -10,6 +10,7 @@
 extern crate lazy_static;
 
 extern crate libc;
+extern crate maybe_uninit;
 
 #[macro_use]
 mod link;

x11-dl/src/link.rs

@@ -55,12 +55,11 @@ macro_rules! x11_link {
         unsafe {
           let libdir = $crate::link::config::libdir::$pkg_name;
           let lib = try!($crate::link::DynamicLibrary::open_multi(libdir, &[$($lib_name),*]));
-          let mut this: ::std::mem::ManuallyDrop<$struct_name>
-              = ::std::mem::uninitialized();
-          let this_ptr = &mut this as *mut _ as *mut $struct_name;
+          let mut this = ::maybe_uninit::MaybeUninit::<$struct_name>::uninit();
+          let this_ptr = this.as_mut_ptr();
           ::std::ptr::write(&mut (*this_ptr).lib, lib);
           try!(Self::init(this_ptr));
-          Ok(::std::mem::ManuallyDrop::into_inner(this))
+          Ok(this.assume_init())
         }
       }
     }