From b2f94e0a16367f4cb63617935a58d571e3acf278 Mon Sep 17 00:00:00 2001
From: Danny Milosavljevic <dannym@scratchpost.org>
Date: Sun, 15 Mar 2020 20:23:11 +0100
Subject: gnu: rust: Bootstrap rust@1.29.0 by mrustc@0.9.

* gnu/packages/patches/rustc-1.29.0-src.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/rust.scm (rust-1.19): Delete variable.
(rust-1.20): Delete variable.
(rust-1.21): Delete variable.
(rust-1.22): Delete variable.
(rust-1.23): Delete variable.
(rust-1.24): Delete variable.
(rust-1.25): Delete variable.
(rust-1.26): Delete variable.
(rust-1.27): Delete variable.
(rust-1.28): Delete variable.
(rust-1.29): Bootstrap from mrustc.
[source]: Add patch.
(rust-1.30)[inputs]: Remove llvm 3.  Add llvm 6.
(mrustc): Update rustc-version to 1.29.0.
---
 gnu/packages/patches/rustc-1.29.0-src.patch | 86 +++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 gnu/packages/patches/rustc-1.29.0-src.patch

(limited to 'gnu/packages/patches/rustc-1.29.0-src.patch')

diff --git a/gnu/packages/patches/rustc-1.29.0-src.patch b/gnu/packages/patches/rustc-1.29.0-src.patch
new file mode 100644
index 0000000000..feeb7e71cf
--- /dev/null
+++ b/gnu/packages/patches/rustc-1.29.0-src.patch
@@ -0,0 +1,86 @@
+From mrustc 0.9.
+# Add mrustc slice length intrinsics
+--- rustc-1.29.0-src/src/libcore/intrinsics.rs
++++ rustc-1.29.0-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-1.29.0-src/src/libcore/slice/mod.rs
++++ rustc-1.29.0-src/src/libcore/slice/mod.rs
+@@ -413,5 +413,7 @@
+     pub const fn len(&self) -> usize {
+-        unsafe {
+-            Repr { rust: self }.raw.len
+-        }
++        #[cfg(not(rust_compiler="mrustc"))]
++        const fn len_inner<T>(s: &[T]) -> usize { unsafe { Repr { rust: s }.raw.len } };
++        #[cfg(rust_compiler="mrustc")]
++        const fn len_inner<T>(s: &[T]) -> usize { unsafe { ::intrinsics::mrustc_slice_len(s) } }
++        len_inner(self)
+     }
+# Static-link rustc_codegen_llvm because mrustc doesn't have dylib support
+--- rustc-1.29.0-src/src/librustc_driver/Cargo.toml
++++ rustc-1.29.0-src/src/librustc_driver/Cargo.toml
+@@ -39,1 +39,2 @@
+ syntax_pos = { path = "../libsyntax_pos" }
++rustc_codegen_llvm = { path = "../librustc_codegen_llvm" }
+--- rustc-1.29.0-src/src/librustc_driver/lib.rs
++++ rustc-1.29.0-src/src/librustc_driver/lib.rs
+@@ -63,2 +63,3 @@
+ extern crate syntax_pos;
++extern crate rustc_codegen_llvm;
+ 
+@@ -296,3 +296,7 @@
+     }
+ 
++    if backend_name == "llvm" {
++        return rustc_codegen_llvm::__rustc_codegen_backend;
++    }
++
+     let target = session::config::host_triple();
+# No workspace support in minicargo, patch cargo's Cargo.toml
+--- rustc-1.29.0-src/src/tools/cargo/Cargo.toml
++++ rustc-1.29.0-src/src/tools/cargo/Cargo.toml
+@@ -60,5 +60,5 @@
+ # A noop dependency that changes in the Rust repository, it's a bit of a hack.
+ # See the `src/tools/rustc-workspace-hack/README.md` file in `rust-lang/rust`
+ # for more information.
+-rustc-workspace-hack = "1.0.0"
++rustc-workspace-hack = { path = "../rustc-workspace-hack" }
+ 
+# mrustc can't represent a 24 byte version of this enum (no way of storing the
+# tag in padding)
+--- rustc-1.29.0-src/src/librustc/ty/context.rs
++++ rustc-1.29.0-src/src/librustc/ty/context.rs
+@@ -805,5 +805,5 @@
+         // Ensure our type representation does not grow
+-        #[cfg(target_pointer_width = "64")]
+-        assert!(mem::size_of::<ty::TypeVariants>() <= 24);
+-        #[cfg(target_pointer_width = "64")]
+-        assert!(mem::size_of::<ty::TyS>() <= 32);
++        //#[cfg(target_pointer_width = "64")]
++        //assert!(mem::size_of::<ty::TypeVariants>() <= 24);
++        //#[cfg(target_pointer_width = "64")]
++        //assert!(mem::size_of::<ty::TyS>() <= 32);
+
+--- rustc-1.29.0-src/src/stdsimd/stdsimd/arch/detect/os/x86.rs
++++ rustc-1.29.0-src/src/stdsimd/stdsimd/arch/detect/os/x86.rs
+@@ -14,5 +14,11 @@
+ /// Performs run-time feature detection.
+ #[inline]
++#[cfg(not(rust_compiler="mrustc"))]
+ pub fn check_for(x: Feature) -> bool {
+     cache::test(x as u32, detect_features)
+ }
++#[inline]
++#[cfg(rust_compiler="mrustc")]
++pub fn check_for(x: Feature) -> bool {
++    false
++}
-- 
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