Use clang-14 for build, update instruction

3 files changed, 12 insertions, 28 deletions

diff --git a/.github/actions/prepare_vm/action.yaml b/.github/actions/prepare_vm/action.yaml
index ea63bae71b0..73648611f7b 100644
--- a/.github/actions/prepare_vm/action.yaml
+++ b/.github/actions/prepare_vm/action.yaml
@@ -16,19 +16,15 @@ runs:
       run: |
         wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc | sudo apt-key add -
         echo "deb https://apt.kitware.com/ubuntu/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null
-    - name: Add cmake, llvm apt repositories for Ubuntu < 22.04
-      shell: bash
-      if: steps.init.outputs.distro_name == 'Ubuntu' && steps.init.outputs.distro_release == '18.04'
-      run: |
         wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-        echo "deb https://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-12 main" | sudo tee /etc/apt/sources.list.d/llvm.list >/dev/null
+        echo "deb https://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-14 main" | sudo tee /etc/apt/sources.list.d/llvm.list >/dev/null
     - name: Install YDB Build dependencies
       shell: bash
       run: |
         sudo apt-get update
         sudo apt-get -y install --no-install-recommends \
           python-is-python3 git cmake python3-pip ninja-build antlr3 m4 \
-          clang-12 lld-12 llvm-12 libidn11-dev libaio1 libaio-dev parallel s3cmd
+          clang-14 lld-14 llvm-14 libidn11-dev libaio1 libaio-dev parallel s3cmd
         sudo pip3 install conan==1.59 pytest==7.1.3 pytest-timeout pytest-xdist==3.3.1 setproctitle==1.3.2 grpcio grpcio-tools PyHamcrest tornado xmltodict pyarrow
     - name: install ccache
       shell: bash
diff --git a/BUILD.md b/BUILD.md
index a5510d35b30..0bbf9af6c59 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -6,8 +6,8 @@
  Below is a list of packages that need to be installed before building YDB. 'How to Build' section contains step by step instructions to obtain these packages.
 
  - cmake 3.22+
- - clang-12
- - lld-12
+ - clang-14
+ - lld-14
  - git 2.20+
  - python3.8
  - pip3
@@ -28,28 +28,16 @@
 
 ## (optional) Add CMake and LLVM APT repositories (for Ubuntu 18.04 and 20.04)
 
-## Ubuntu 18.04
+## Ubuntu 18.04 and Ubuntu 20.04
 
-For Ubuntu 18.04, you have to add CMake and LLVM APT repositories:
+For Ubuntu 18.04 and Ubuntu 20.04, you have to add CMake and LLVM APT repositories:
 
 ```bash
 wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc | sudo apt-key add -
 echo "deb http://apt.kitware.com/ubuntu/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null
 
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-12 main" | sudo tee /etc/apt/sources.list.d/llvm.list >/dev/null
-
-sudo apt-get update
-
-```
-
-## Ubuntu 20.04
-
-For Ubuntu 20.04, you have to add CMake APT repository:
-
-```bash
-wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc | sudo apt-key add -
-echo "deb http://apt.kitware.com/ubuntu/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null
+echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-14 main" | sudo tee /etc/apt/sources.list.d/llvm.list >/dev/null
 
 sudo apt-get update
 
@@ -59,7 +47,7 @@ sudo apt-get update
 ## Install dependencies
 
 ```bash
-sudo apt-get -y install git cmake python3-pip ninja-build antlr3 m4 clang-12 lld-12 libidn11-dev libaio1 libaio-dev llvm-12
+sudo apt-get -y install git cmake python3-pip ninja-build antlr3 m4 clang-14 lld-14 libidn11-dev libaio1 libaio-dev llvm-14
 sudo pip3 install conan==1.59
 
 ```
diff --git a/clang.toolchain b/clang.toolchain
index 5097ea571c7..b8ce37232d7 100644
--- a/clang.toolchain
+++ b/clang.toolchain
@@ -1,8 +1,8 @@
-set(CMAKE_C_COMPILER clang-12)
-set(CMAKE_CXX_COMPILER clang++-12)
+set(CMAKE_C_COMPILER clang-14)
+set(CMAKE_CXX_COMPILER clang++-14)
 set(CMAKE_EXE_LINKER_FLAGS "-fuse-ld=lld -rdynamic")
 set(CMAKE_SHARED_LINKER_FLAGS "-fuse-ld=lld")
 set(CMAKE_C_STANDARD_LIBRARIES "-lc -lm")
 set(CMAKE_CXX_STANDARD_LIBRARIES "-lc -lm")
-set(ENV{CC} clang-12)
-set(ENV{CXX} clang++-12)
+set(ENV{CC} clang-14)
+set(ENV{CXX} clang++-14)