From 9a23c29b00820f21a347bb8e423fc292ad714b13 Mon Sep 17 00:00:00 2001
From: rahul shrivastava <rahul.shrivastava@cerebras.net>
Date: Wed, 18 Dec 2024 06:20:07 -0800
Subject: [PATCH] Downgrade clang

Signed-off-by: rahul shrivastava <rahul.shrivastava@cerebras.net>
---
 .github/workflows/ci.yml      | 11 +++++++++++
 build_tools/ci/build_posix.sh |  2 +-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 63ef01cdeb519..9b0700f71407e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,6 +27,17 @@ jobs:
     env:
       CACHE_DIR: ${{ github.workspace }}/.container-cache
     steps:
+      - name: Install Clang 17.0.6
+        run: |
+          sudo yum update -y
+          sudo yum install -y wget
+          wget https://apt.llvm.org/llvm.sh
+          sudo hmod +x llvm.sh
+          ./llvm.sh 17
+          sudo yum install -y clang-17 lldb-17 lld-17 clang-tools-extra-17
+          echo "Clang version installed:"
+      - name: Verify Clang installation
+        run: clang --version
       - name: Configure local git mirrors
         run: |
           # Our stock runners have access to certain local git caches. If these
diff --git a/build_tools/ci/build_posix.sh b/build_tools/ci/build_posix.sh
index 36e9057c973f8..ea3e570c8b7e1 100755
--- a/build_tools/ci/build_posix.sh
+++ b/build_tools/ci/build_posix.sh
@@ -50,7 +50,7 @@ cmake -S "$repo_root/externals/llvm-project/llvm" -B "$build_dir" \
   -DLLVM_EXTERNAL_TORCH_MLIR_SOURCE_DIR="$repo_root" \
   -DLLVM_TARGETS_TO_BUILD=host \
   -DMLIR_ENABLE_BINDINGS_PYTHON=ON \
-  -DTORCH_MLIR_ENABLE_LTC=OFF \
+  -DTORCH_MLIR_ENABLE_LTC=ON \
   -DTORCH_MLIR_ENABLE_PYTORCH_EXTENSIONS=ON
 echo "::endgroup::"