Using LLVM under tags/swift-5.1.3-RELEASE and Rust under tags/1.40.0

Author: pruthvikar

build.sh

@@ -16,12 +16,12 @@ fi
 
 cd "$WORKING_DIR"
 if [ ! -d "$WORKING_DIR/llvm-project" ]; then
-    git clone https://github.com/apple/llvm-project.git -b "$LLVM_BRANCH"
+    git clone https://github.com/apple/llvm-project.git
 fi
 cd "$WORKING_DIR/llvm-project"
 git reset --hard
 git clean -f
-git checkout "origin/$LLVM_BRANCH"
+git checkout "$LLVM_BRANCH"
 cd ..
 
 mkdir -p llvm-build
@@ -37,7 +37,7 @@ fi
 cd rust
 git reset --hard
 git clean -f
-git checkout "$RUST_COMMIT"
+git checkout "$RUST_BRANCH"
 cd ..
 mkdir -p rust-build
 cd rust-build

config.sh

@@ -1,18 +1,18 @@
-# 1. Select the best branch from https://github.com/apple/llvm-project
-
+# 1. Select the best branch, tag or commit hash from https://github.com/apple/llvm-project
+# The recommended approach is to use the tagged release that matches the Swift version
+# returned by the command below (at this time running Xcode Version 11.3.1 (11C504))
 # $ xcrun -sdk iphoneos swiftc --version
-# Apple Swift version 5.1 (swiftlang-1100.0.270.13 clang-1100.0.33.7)
-# Target: x86_64-apple-darwin19.0.0
+# Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15)
+# Target: x86_64-apple-darwin19.3.0
+
+LLVM_BRANCH="tags/swift-5.1.3-RELEASE"
+
+# 2. Select the best branch, tag or commit hash from https://github.com/rust-lang/rust
+# The stable 1.40.0 version of Rust seems to work
 
-# There is a branch called "apple/stable/20190619" which is equivalent to the "stable"
-# Branch under https://github.com/apple/swift-llvm under which looks promising.
-# At this time (running Xcode 11.3) it's a couple of months newer than the 5.1 branch
-LLVM_BRANCH="apple/stable/20190619"
+RUST_BRANCH="tags/1.40.0"
 
-# 2. Pick/install a working Rust nightly (ideally one where RLS and clippy built)
-# 3. Note its date
-RUST_NIGHTLY="2019-12-16"
+# 3. Select a name for the toolchain you want to install as. The toolchain will be installed
+# under $HOME/.rust-ios-arm64/toolchain-$RUST_TOOLCHAIN
 
-# 4. Get its commit - this is what we will check out to build the iOS version
-# rustc --version | cut -d '(' -f2 | cut -d ' ' -f1
-RUST_COMMIT="a605441e0"
+RUST_TOOLCHAIN="1.40.0"

install.sh

@@ -3,7 +3,7 @@ set -euxo
 source config.sh
 
 WORKING_DIR="$(pwd)/build"
-DEST_TOOLCHAIN="$HOME/.rust-ios-arm64/toolchain-$RUST_NIGHTLY"
+DEST_TOOLCHAIN="$HOME/.rust-ios-arm64/toolchain-$RUST_TOOLCHAIN"
 
 mkdir -p "$DEST_TOOLCHAIN"
 cp -r "$WORKING_DIR/rust-build/build/x86_64-apple-darwin/stage2"/* "$DEST_TOOLCHAIN"