build: use llvm@17 in darwin

Signed-off-by: Lloyd-Pottiger <[email protected]>

Author: Lloyd-Pottiger

README.md

@@ -37,7 +37,7 @@ And the following operating systems:
 The following packages are required:
 
 - CMake 3.23.0+
-- Clang 17.0.0+ under Linux or AppleClang 14.0.0+ under MacOS
+- Clang 17.0.0+
 - Rust
 - Python 3.0+
 - Ninja-Build or GNU Make
@@ -123,11 +123,7 @@ xcode-select --install
 
 # Install other dependencies
 brew install ninja cmake [email protected] ccache
-```
-
-If your MacOS is higher or equal to 13.0 (Ventura), it should work out of the box because by default Xcode 14.3 provides Apple clang 14.0.0. But if your MacOS is lower than 13.0, you should install llvm clang manually.
 
-```shell
 brew install llvm@17
 
 # check llvm version
@@ -163,17 +159,17 @@ In MacOS, if you install llvm clang, you need to explicitly specify to use llvm
 
 Add the following lines to your shell environment, e.g. `~/.bash_profile`.
 ```shell
-export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
-export CC="/opt/homebrew/opt/llvm/bin/clang"
-export CXX="/opt/homebrew/opt/llvm/bin/clang++"
+export PATH="$(brew --prefix)/opt/llvm/bin:$PATH"
+export CC="$(brew --prefix)/opt/llvm/bin/clang"
+export CXX="$(brew --prefix)/opt/llvm/bin/clang++"
 ```
 
 Or use `CMAKE_C_COMPILER` and `CMAKE_CXX_COMPILER` to specify the compiler, like this:
 ```shell
 mkdir cmake-build-debug
 cd cmake-build-debug
 
-cmake .. -GNinja -DCMAKE_BUILD_TYPE=DEBUG -DCMAKE_C_COMPILER=/opt/homebrew/opt/llvm/bin/clang -DCMAKE_CXX_COMPILER=/opt/homebrew/opt/llvm/bin/clang++
+cmake .. -GNinja -DCMAKE_BUILD_TYPE=DEBUG -DCMAKE_C_COMPILER="$(brew --prefix)/opt/llvm/bin/clang" -DCMAKE_CXX_COMPILER="$(brew --prefix)/opt/llvm/bin/clang++"
 
 ninja tiflash
 ```

release-darwin/build/build-release.sh

@@ -32,6 +32,11 @@ if [ -d "$install_dir" ]; then rm -rf "${install_dir:?}"/*; else mkdir -p "$inst
 build_dir="$SRCPATH/release-darwin/build-release"
 rm -rf $build_dir && mkdir -p $build_dir && cd $build_dir
 
+# use llvm@17
+export PATH="$(brew --prefix)/opt/llvm@17/bin:$PATH"
+export CC="$(brew --prefix)/opt/llvm@17/bin/clang"
+export CXX="$(brew --prefix)/opt/llvm@17/bin/clang++"
+
 cmake "$SRCPATH" \
       -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE \
       -DUSE_INTERNAL_SSL_LIBRARY=ON \

release-darwin/prepare-environments/prepare-llvm.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# Copyright 2023 PingCAP, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -ueox pipefail
+
+brew install llvm@17