From a9f730b8534238b176453cc06648e702b4007c29 Mon Sep 17 00:00:00 2001
From: meihanc <jcccx.cmh@gmail.com>
Date: Wed, 14 Jan 2026 22:58:08 +0800
Subject: [PATCH] [bugfix]Intermittent CI failure in the triton runtime jit
 (#5733)

### What this PR does / why we need it?
fix bug : https://github.com/vllm-project/vllm-ascend/issues/5634
Intermittent CI failure due to a compilation error in the triton
operator
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?

- vLLM version: v0.13.0
- vLLM main:
https://github.com/vllm-project/vllm/commit/2f4e6548efec402b913ffddc8726230d9311948d

---------

Signed-off-by: Meihan-chen <jcccx.cmh@gmail.com>
---
 .github/workflows/_e2e_nightly_single_node_models.yaml | 3 +++
 .github/workflows/_e2e_test.yaml                       | 9 +++++++++
 .github/workflows/_unit_test.yaml                      | 3 +++
 tests/e2e/nightly/multi_node/scripts/run.sh            | 4 ++++
 4 files changed, 19 insertions(+)

diff --git a/.github/workflows/_e2e_nightly_single_node_models.yaml b/.github/workflows/_e2e_nightly_single_node_models.yaml
index 6cb1a371..3ba102d8 100644
--- a/.github/workflows/_e2e_nightly_single_node_models.yaml
+++ b/.github/workflows/_e2e_nightly_single_node_models.yaml
@@ -107,6 +107,9 @@ jobs:
       - name: Install Ascend toolkit & triton_ascend
         shell: bash -l {0}
         run: |
+          apt-get -y install clang-15
+          update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
+          update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20          
           BISHENG_NAME="Ascend-BiSheng-toolkit_aarch64_20260105.run"
           BISHENG_URL="https://vllm-ascend.obs.cn-north-4.myhuaweicloud.com/vllm-ascend/${BISHENG_NAME}"
           wget -O "${BISHENG_NAME}" "${BISHENG_URL}" && chmod a+x "${BISHENG_NAME}" && "./${BISHENG_NAME}" --install && rm "${BISHENG_NAME}"
diff --git a/.github/workflows/_e2e_test.yaml b/.github/workflows/_e2e_test.yaml
index cfbcf6e6..3e69f58e 100644
--- a/.github/workflows/_e2e_test.yaml
+++ b/.github/workflows/_e2e_test.yaml
@@ -71,6 +71,9 @@ jobs:
       - name: Install Ascend toolkit & triton_ascend
         shell: bash -l {0}
         run: |
+          apt-get -y install clang-15
+          update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
+          update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20
           BISHENG_NAME="Ascend-BiSheng-toolkit_aarch64_20260105.run"
           BISHENG_URL="https://vllm-ascend.obs.cn-north-4.myhuaweicloud.com/vllm-ascend/${BISHENG_NAME}"
           wget -O "${BISHENG_NAME}" "${BISHENG_URL}" && chmod a+x "${BISHENG_NAME}" && "./${BISHENG_NAME}" --install && rm "${BISHENG_NAME}"
@@ -194,6 +197,9 @@ jobs:
       - name: Install Ascend toolkit & triton_ascend
         shell: bash -l {0}
         run: |
+          apt-get -y install clang-15
+          update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
+          update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20
           BISHENG_NAME="Ascend-BiSheng-toolkit_aarch64_20260105.run"
           BISHENG_URL="https://vllm-ascend.obs.cn-north-4.myhuaweicloud.com/vllm-ascend/${BISHENG_NAME}"
           wget -O "${BISHENG_NAME}" "${BISHENG_URL}" && chmod a+x "${BISHENG_NAME}" && "./${BISHENG_NAME}" --install && rm "${BISHENG_NAME}"
@@ -296,6 +302,9 @@ jobs:
       - name: Install Ascend toolkit & triton_ascend
         shell: bash -l {0}
         run: |
+          apt-get -y install clang-15
+          update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
+          update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20
           BISHENG_NAME="Ascend-BiSheng-toolkit_aarch64_20260105.run"
           BISHENG_URL="https://vllm-ascend.obs.cn-north-4.myhuaweicloud.com/vllm-ascend/${BISHENG_NAME}"
           wget -O "${BISHENG_NAME}" "${BISHENG_URL}" && chmod a+x "${BISHENG_NAME}" && "./${BISHENG_NAME}" --install && rm "${BISHENG_NAME}"
diff --git a/.github/workflows/_unit_test.yaml b/.github/workflows/_unit_test.yaml
index 8ac9dcb6..54762a18 100644
--- a/.github/workflows/_unit_test.yaml
+++ b/.github/workflows/_unit_test.yaml
@@ -62,6 +62,9 @@ jobs:
       - name: Install Ascend toolkit & triton_ascend
         shell: bash -l {0}
         run: |
+          apt-get -y install clang-15
+          update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
+          update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20
           BISHENG_NAME="Ascend-BiSheng-toolkit_aarch64_20260105.run"
           BISHENG_URL="https://vllm-ascend.obs.cn-north-4.myhuaweicloud.com/vllm-ascend/${BISHENG_NAME}"
           wget -O "${BISHENG_NAME}" "${BISHENG_URL}" && chmod a+x "${BISHENG_NAME}" && "./${BISHENG_NAME}" --install && rm "${BISHENG_NAME}"
diff --git a/tests/e2e/nightly/multi_node/scripts/run.sh b/tests/e2e/nightly/multi_node/scripts/run.sh
index 2b536db9..229dc2a3 100644
--- a/tests/e2e/nightly/multi_node/scripts/run.sh
+++ b/tests/e2e/nightly/multi_node/scripts/run.sh
@@ -127,6 +127,10 @@ install_extra_components() {
 
 install_triton_ascend() {
     echo "====> Installing triton_ascend"
+    apt-get install -y clang-15
+    update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
+    update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20
+    clang -v
 
     BISHENG_NAME="Ascend-BiSheng-toolkit_aarch64_20260105.run"
     BISHENG_URL="https://vllm-ascend.obs.cn-north-4.myhuaweicloud.com/vllm-ascend/${BISHENG_NAME}"