Prevent linker from stripping exports on Linux (#33)

zluda/src/lib.rs

@@ -11,6 +11,6 @@ extern crate paste;
 extern crate ptx;
 
 #[allow(warnings)]
-mod cuda;
+pub mod cuda;
 mod cuda_impl;
 pub(crate) mod r#impl;

zluda_lib/src/lib.rs

@@ -1,3 +1,11 @@
 pub extern crate zluda;
 
-pub use zluda::*;
+pub use zluda::cuda::*;
+
+// For some reason, on Linux linker strips out all our re-exports,
+// there's probably a cleaner solution, but for now just exporting
+// the function below stops it from doing so
+#[no_mangle]
+fn _zluda_very_bad_linker_hack() {
+    cuInit(0);
+}