rustc: Support aarch64

pkgs/development/compilers/rust/bootstrap.nix

@@ -9,6 +9,7 @@ let
   hashes = {
     i686-unknown-linux-gnu = "abe592e06616cdc2fcca56ddbe482050dd49a1fada35e2af031c64fe6eb14668";
     x86_64-unknown-linux-gnu = "ca1cf3aed73ff03d065a7d3e57ecca92228d35dc36d9274a6597441319f18eb8";
+    aarch64-unknown-linux-gnu = "eaab3df489d4d8f976c4327d812b9870730eed6d0bbd52712767083d02be7472";
     i686-apple-darwin = "b3c2470f8f132d285e6c989681e251592b67071bc9d93cac8a2e6b66f7bdfcb5";
     x86_64-apple-darwin = "fa1fb8896d5e327cbe6deeb50e6e9a3346de629f2e6bcbd8c10f19f3e2ed67d5";
   };
@@ -18,6 +19,8 @@ let
     then "i686-unknown-linux-gnu"
     else if stdenv.system == "x86_64-linux"
     then "x86_64-unknown-linux-gnu"
+    else if stdenv.system == "aarch64-linux"
+    then "aarch64-unknown-linux-gnu"
     else if stdenv.system == "i686-darwin"
     then "i686-apple-darwin"
     else if stdenv.system == "x86_64-darwin"

pkgs/development/compilers/rust/default.nix

@@ -23,7 +23,9 @@ rec {
 
     patches = [
       ./patches/0001-Disable-fragile-tests-libstd-net-tcp-on-Darwin-Linux.patch
-    ] ++ stdenv.lib.optional stdenv.needsPax ./patches/grsec.patch;
+    ] ++ stdenv.lib.optional stdenv.needsPax ./patches/grsec.patch
+      # https://github.com/rust-lang/rust/issues/45410
+      ++ stdenv.lib.optional stdenv.isAarch64 ./patches/aarch64-disable-test_loading_cosine.patch;
 
   };
 

pkgs/development/compilers/rust/patches/aarch64-disable-test_loading_cosine.patch

@@ -0,0 +1,12 @@
+diff --git a/src/librustc_back/dynamic_lib.rs b/src/librustc_back/dynamic_lib.rs
+index 1b42fa0..92256dc 100644
+--- a/src/librustc_back/dynamic_lib.rs
++++ b/src/librustc_back/dynamic_lib.rs
+@@ -80,6 +80,7 @@ mod tests {
+     use std::mem;
+ 
+     #[test]
++    #[ignore]
+     fn test_loading_cosine() {
+         if cfg!(windows) {
+             return

pkgs/development/compilers/rust/print-hashes.sh

@@ -10,6 +10,7 @@ set -euo pipefail
 PLATFORMS=(
   i686-unknown-linux-gnu
   x86_64-unknown-linux-gnu
+  aarch64-unknown-linux-gnu
   i686-apple-darwin
   x86_64-apple-darwin
 )

pkgs/development/compilers/rust/rustc.nix

@@ -34,6 +34,9 @@ stdenv.mkDerivation {
 
   __darwinAllowLocalNetworking = true;
 
+  # The build will fail at the very end on AArch64 without this.
+  dontUpdateAutotoolsGnuConfigScripts = if stdenv.isAarch64 then true else null;
+
   NIX_LDFLAGS = optionalString stdenv.isDarwin "-rpath ${llvmShared}/lib";
 
   # Enable nightly features in stable compiles (used for