Add protbuf installation

Author: rgsl888prabhu

ci/build_wheel_libcuopt.sh

@@ -17,6 +17,9 @@ fi
 # Install Boost and TBB
 bash ci/utils/install_boost_tbb.sh
 
+# Install Protobuf
+bash ci/utils/install_protobuf.sh
+
 export SKBUILD_CMAKE_ARGS="-DCUOPT_BUILD_WHEELS=ON;-DDISABLE_DEPRECATION_WARNING=ON"
 
 # For pull requests we are enabling assert mode.

ci/utils/install_protobuf.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+set -euo pipefail
+
+# Install Protobuf development libraries
+if [ -f /etc/os-release ]; then
+    . /etc/os-release
+    if [[ "$ID" == "rocky" ]]; then
+        echo "Detected Rocky Linux. Installing Protobuf via dnf..."
+        dnf install -y protobuf-devel protobuf-compiler
+    elif [[ "$ID" == "ubuntu" ]]; then
+        echo "Detected Ubuntu. Installing Protobuf via apt..."
+        apt-get update
+        apt-get install -y libprotobuf-dev protobuf-compiler
+    else
+        echo "Unknown OS: $ID. Please install Protobuf development libraries manually."
+        exit 1
+    fi
+else
+    echo "/etc/os-release not found. Cannot determine OS. Please install Protobuf development libraries manually."
+    exit 1
+fi