From e9d447ac2ab3bf7369cd19917e2d01bca6f61f02 Mon Sep 17 00:00:00 2001
From: Andy Lee <andylizf@outlook.com>
Date: Mon, 1 Sep 2025 13:53:15 -0700
Subject: [PATCH] fix: Use OpenBLAS for ARM64 Linux builds instead of Intel MKL

---
 .github/workflows/build-reusable.yml | 42 +++++++++++++++++-----------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/.github/workflows/build-reusable.yml b/.github/workflows/build-reusable.yml
index 72b18dc..b022bc5 100644
--- a/.github/workflows/build-reusable.yml
+++ b/.github/workflows/build-reusable.yml
@@ -125,28 +125,36 @@ jobs:
           echo "OS: $(uname -a)"
           echo "CPU info: $(lscpu | head -5)"
 
-          # Install Intel MKL for DiskANN (supports both x86_64 and aarch64)
-          wget -q https://registrationcenter-download.intel.com/akdlm/IRC_NAS/79153e0f-74d7-45af-b8c2-258941adf58a/intel-onemkl-2025.0.0.940.sh
-          sudo sh intel-onemkl-2025.0.0.940.sh -a --components intel.oneapi.lin.mkl.devel --action install --eula accept -s
-          source /opt/intel/oneapi/setvars.sh
-          echo "MKLROOT=/opt/intel/oneapi/mkl/latest" >> $GITHUB_ENV
-
-          # Debug: Check MKL installation
-          echo "🔍 MKL Installation Check:"
-          ls -la /opt/intel/oneapi/mkl/latest/ || echo "MKL directory not found"
-          ls -la /opt/intel/oneapi/mkl/latest/lib/ || echo "MKL lib directory not found"
-
-          # Set library paths based on architecture
+          # Install math library based on architecture
           ARCH=$(uname -m)
-          echo "🔍 Setting library paths for architecture: $ARCH"
+          echo "🔍 Setting up math library for architecture: $ARCH"
+
           if [[ "$ARCH" == "x86_64" ]]; then
+            # Install Intel MKL for DiskANN on x86_64
+            echo "📦 Installing Intel MKL for x86_64..."
+            wget -q https://registrationcenter-download.intel.com/akdlm/IRC_NAS/79153e0f-74d7-45af-b8c2-258941adf58a/intel-onemkl-2025.0.0.940.sh
+            sudo sh intel-onemkl-2025.0.0.940.sh -a --components intel.oneapi.lin.mkl.devel --action install --eula accept -s
+            source /opt/intel/oneapi/setvars.sh
+            echo "MKLROOT=/opt/intel/oneapi/mkl/latest" >> $GITHUB_ENV
             echo "LD_LIBRARY_PATH=/opt/intel/oneapi/compiler/latest/linux/compiler/lib/intel64_lin" >> $GITHUB_ENV
             echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/intel/oneapi/mkl/latest/lib/intel64" >> $GITHUB_ENV
-            echo "✅ Set x86_64 library paths"
+            echo "✅ Intel MKL installed for x86_64"
+
+            # Debug: Check MKL installation
+            echo "🔍 MKL Installation Check:"
+            ls -la /opt/intel/oneapi/mkl/latest/ || echo "MKL directory not found"
+            ls -la /opt/intel/oneapi/mkl/latest/lib/ || echo "MKL lib directory not found"
+
           elif [[ "$ARCH" == "aarch64" ]]; then
-            echo "LD_LIBRARY_PATH=/opt/intel/oneapi/compiler/latest/linux/compiler/lib" >> $GITHUB_ENV
-            echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/intel/oneapi/mkl/latest/lib" >> $GITHUB_ENV
-            echo "✅ Set ARM64 library paths"
+            # Use OpenBLAS for ARM64 (MKL installer not compatible with ARM64)
+            echo "📦 Installing OpenBLAS for ARM64..."
+            sudo apt-get install -y libopenblas-dev liblapack-dev
+            echo "✅ OpenBLAS installed for ARM64"
+
+            # Debug: Check OpenBLAS installation
+            echo "🔍 OpenBLAS Installation Check:"
+            dpkg -l | grep openblas || echo "OpenBLAS package not found"
+            ls -la /usr/lib/aarch64-linux-gnu/openblas/ || echo "OpenBLAS directory not found"
           fi
 
           # Debug: Show final library paths