Build fails due to std crate in kernel binding while std/lib.rs specifies #![no_std] attribute


#1

I am trying to build a minimal kernel driver in Rust. I am using rust.ko as the starting point. The project doesn’t get compiled out of the box with rustc 1.20.0-nightly (bf0a9e0b4 2017-07-10). Instead of the forked version of bindgen (which doesn’t get compiled), I used the original one which generates a kernel binding that uses std crate everywhere. A snippet looks like:

pub struct __IncompleteArrayField<T>(::std::marker::PhantomData<T>);
impl <T> __IncompleteArrayField<T> {
    #[inline]
    pub fn new() -> Self {
        __IncompleteArrayField(::std::marker::PhantomData)
    }
    #[inline]
    pub unsafe fn as_ptr(&self) -> *const T { ::std::mem::transmute(self) }
    #[inline]
    pub unsafe fn as_mut_ptr(&mut self) -> *mut T {
        ::std::mem::transmute(self)
    }
    #[inline]
    pub unsafe fn as_slice(&self, len: usize) -> &[T] {
        ::std::slice::from_raw_parts(self.as_ptr(), len)
    }
    #[inline]
    pub unsafe fn as_mut_slice(&mut self, len: usize) -> &mut [T] {
        ::std::slice::from_raw_parts_mut(self.as_mut_ptr(), len)
    }
}

While compiling, I get the following errors (a lot of similar ones because of use of std crate).

error[E0433]: failed to resolve. Could not find `marker` in `std`
 --> std/src/os/kernel.rs:5:38
  |
5 | pub struct __IncompleteArrayField<T>(::std::marker::PhantomData<T>);
  |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Could not find `marker` in `std`

I wonder how the original project was even compiled. Any idea how can I get around the issue?