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-rw-r--r--gnu/packages/patches/rust-1.19-mrustc.patch28
1 files changed, 28 insertions, 0 deletions
diff --git a/gnu/packages/patches/rust-1.19-mrustc.patch b/gnu/packages/patches/rust-1.19-mrustc.patch
new file mode 100644
index 0000000000..261162172e
--- /dev/null
+++ b/gnu/packages/patches/rust-1.19-mrustc.patch
@@ -0,0 +1,28 @@
+See https://github.com/thepowersgang/mrustc/archive/v0.8.0.tar.gz
+
+--- rustc-1.19.0-src-orig/src/libcore/intrinsics.rs
++++ rustc-1.19.0-src/src/libcore/intrinsics.rs
+@@ -678,5 +678,9 @@
+ pub fn min_align_of_val<T: ?Sized>(_: &T) -> usize;
+
++ /// Obtain the length of a slice pointer
++ #[cfg(rust_compiler="mrustc")]
++ pub fn mrustc_slice_len<T>(pointer: *const [T]) -> usize;
++
+ /// Gets a static string slice containing the name of a type.
+ pub fn type_name<T: ?Sized>() -> &'static str;
+
+--- rustc-1.19.0-src-orig/src/libcore/slice/mod.rs
++++ rustc-1.19.0-src/src/libcore/slice/mod.rs
+@@ -413,6 +413,8 @@
+ #[inline]
+ fn len(&self) -> usize {
+- unsafe {
+- mem::transmute::<&[T], Repr<T>>(self).len
+- }
++ #[cfg(not(rust_compiler="mrustc"))]
++ let rv = unsafe { mem::transmute::<&[T], Repr<T>>(self).len };
++ #[cfg(rust_compiler="mrustc")]
++ let rv = unsafe { ::intrinsics::mrustc_slice_len(self) };
++ rv
+ }