rust: 1.45.2 -> 1.46.0

This adds the rust toolchain 1.46.0:

https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1460-2020-08-27

Because rustc-1.46.0 enables static PIE by default for
`x86_64-unknown-linux-musl` this release will suffer from:

https://github.com/NixOS/nixpkgs/issues/94228

So this commit doesn't remove the 1.45.2 release.

This commit also specifies the right LLVM packages to use for each
rust release.

(cherry picked from commit b837bd4305144d04bdbb796507aa57691976336d)

5 files changed, 66 insertions, 9 deletions

diff --git a/nixpkgs/pkgs/development/compilers/rust/1_44.nix b/nixpkgs/pkgs/development/compilers/rust/1_44.nix
index 9fc268d152b1..fca6a677ddab 100644
--- a/nixpkgs/pkgs/development/compilers/rust/1_44.nix
+++ b/nixpkgs/pkgs/development/compilers/rust/1_44.nix
@@ -11,7 +11,7 @@
 , buildPackages
 , newScope, callPackage
 , CoreFoundation, Security
-, llvmPackages_5
+, llvmPackages
 , pkgsBuildTarget, pkgsBuildBuild
 } @ args:
 
diff --git a/nixpkgs/pkgs/development/compilers/rust/1_45.nix b/nixpkgs/pkgs/development/compilers/rust/1_45.nix
index 1a634d3f51ed..41c380174aef 100644
--- a/nixpkgs/pkgs/development/compilers/rust/1_45.nix
+++ b/nixpkgs/pkgs/development/compilers/rust/1_45.nix
@@ -11,7 +11,7 @@
 , buildPackages
 , newScope, callPackage
 , CoreFoundation, Security
-, llvmPackages_5
+, llvmPackages
 , pkgsBuildTarget, pkgsBuildBuild
 } @ args:
 
diff --git a/nixpkgs/pkgs/development/compilers/rust/1_46.nix b/nixpkgs/pkgs/development/compilers/rust/1_46.nix
new file mode 100644
index 000000000000..04954a043bf8
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/rust/1_46.nix
@@ -0,0 +1,44 @@
+# New rust versions should first go to staging.
+# Things to check after updating:
+# 1. Rustc should produce rust binaries on x86_64-linux, aarch64-linux and x86_64-darwin:
+#    i.e. nix-shell -p fd or @GrahamcOfBorg build fd on github
+#    This testing can be also done by other volunteers as part of the pull
+#    request review, in case platforms cannot be covered.
+# 2. The LLVM version used for building should match with rust upstream.
+#    Check the version number in the src/llvm-project git submodule in:
+#    https://github.com/rust-lang/rust/blob/<version-tag>/.gitmodules
+# 3. Firefox and Thunderbird should still build on x86_64-linux.
+
+{ stdenv, lib
+, buildPackages
+, newScope, callPackage
+, CoreFoundation, Security
+, llvmPackages
+, pkgsBuildTarget, pkgsBuildBuild
+} @ args:
+
+import ./default.nix {
+  rustcVersion = "1.46.0";
+  rustcSha256 = "0a17jby2pd050s24cy4dfc0gzvgcl585v3vvyfilniyvjrqknsid";
+
+  # Note: the version MUST be one version prior to the version we're
+  # building
+  bootstrapVersion = "1.45.2";
+
+  # fetch hashes by running `print-hashes.sh 1.45.2`
+  bootstrapHashes = {
+    i686-unknown-linux-gnu = "5b2050dde23152750de89f7e59acaab6bf088d0beb5854c69c9a545fd254b936";
+    x86_64-unknown-linux-gnu = "860feed955726a4d96ffe40758a110053326b9ae11c9e1ee059e9c6222f25643";
+    arm-unknown-linux-gnueabihf = "ddb5f59bbdef84e0b7c83049461e003ed031dd881a4622365c3d475102535c60";
+    armv7-unknown-linux-gnueabihf = "7a556581f87602705f9c89b04cce621cfbba9050b6fbe478166e91d164567531";
+    aarch64-unknown-linux-gnu = "151fad66442d28a4e4786753d1afb559c4a3d359081c64769273a31c2f0f4d30";
+    x86_64-apple-darwin = "6e8067624ede10aa23081d62e0086c6f42f7228cc0d00fb5ff24d4dac65249d6";
+  };
+
+  selectRustPackage = pkgs: pkgs.rust_1_46;
+
+  rustcPatches = [
+  ];
+}
+
+(builtins.removeAttrs args [ "fetchpatch" ])
diff --git a/nixpkgs/pkgs/development/compilers/rust/default.nix b/nixpkgs/pkgs/development/compilers/rust/default.nix
index d08b63dd643f..9545b851815f 100644
--- a/nixpkgs/pkgs/development/compilers/rust/default.nix
+++ b/nixpkgs/pkgs/development/compilers/rust/default.nix
@@ -10,7 +10,7 @@
 , buildPackages
 , newScope, callPackage
 , CoreFoundation, Security
-, llvmPackages_5
+, llvmPackages
 , pkgsBuildTarget, pkgsBuildBuild
 }: rec {
   toRustTarget = platform: with platform.parsed; let
@@ -80,10 +80,10 @@
         # Use boot package set to break cycle
         rustPlatform = bootRustPlatform;
       } // lib.optionalAttrs (stdenv.cc.isClang && stdenv.hostPlatform == stdenv.buildPlatform) {
-        stdenv = llvmPackages_5.stdenv;
-        pkgsBuildBuild = pkgsBuildBuild // { targetPackages.stdenv = llvmPackages_5.stdenv; };
-        pkgsBuildHost = pkgsBuildBuild // { targetPackages.stdenv = llvmPackages_5.stdenv; };
-        pkgsBuildTarget = pkgsBuildTarget // { targetPackages.stdenv = llvmPackages_5.stdenv; };
+        stdenv = llvmPackages.stdenv;
+        pkgsBuildBuild = pkgsBuildBuild // { targetPackages.stdenv = llvmPackages.stdenv; };
+        pkgsBuildHost = pkgsBuildBuild // { targetPackages.stdenv = llvmPackages.stdenv; };
+        pkgsBuildTarget = pkgsBuildTarget // { targetPackages.stdenv = llvmPackages.stdenv; };
       });
       rustfmt = self.callPackage ./rustfmt.nix { inherit Security; };
       cargo = self.callPackage ./cargo.nix {
diff --git a/nixpkgs/pkgs/top-level/all-packages.nix b/nixpkgs/pkgs/top-level/all-packages.nix
index 710ee83ab107..387916ab7756 100644
--- a/nixpkgs/pkgs/top-level/all-packages.nix
+++ b/nixpkgs/pkgs/top-level/all-packages.nix
@@ -9163,15 +9163,28 @@ in
 
   rust_1_44 = callPackage ../development/compilers/rust/1_44.nix {
     inherit (darwin.apple_sdk.frameworks) CoreFoundation Security;
+    llvmPackages = llvmPackages_9;
   };
+  # Because rustc-1.46.0 enables static PIE by default for
+  # `x86_64-unknown-linux-musl` this release will suffer from:
+  #
+  # https://github.com/NixOS/nixpkgs/issues/94228
+  #
+  # So this commit doesn't remove the 1.45.2 release.
   rust_1_45 = callPackage ../development/compilers/rust/1_45.nix {
     inherit (darwin.apple_sdk.frameworks) CoreFoundation Security;
+    llvmPackages = llvmPackages_10;
+  };
+  rust_1_46 = callPackage ../development/compilers/rust/1_46.nix {
+    inherit (darwin.apple_sdk.frameworks) CoreFoundation Security;
+    llvmPackages = llvmPackages_10;
   };
-  rust = rust_1_45;
+  rust = rust_1_46;
 
   rustPackages_1_44 = rust_1_44.packages.stable;
   rustPackages_1_45 = rust_1_45.packages.stable;
-  rustPackages = rustPackages_1_45;
+  rustPackages_1_46 = rust_1_46.packages.stable;
+  rustPackages = rustPackages_1_46;
 
   inherit (rustPackages) cargo clippy rustc rustPlatform;
   inherit (rust) makeRustPlatform;