Add cudss as a dependency

ci/build_wheel_cuopt.sh

@@ -20,6 +20,9 @@ set -euo pipefail
 
 source rapids-init-pip
 
+# Install cudss
+bash ci/utils/install_cudss.sh
+
 package_dir="python/cuopt"
 export SKBUILD_CMAKE_ARGS="-DCUOPT_BUILD_WHEELS=ON;-DDISABLE_DEPRECATION_WARNINGS=ON";
 

ci/build_wheel_libcuopt.sh

@@ -34,6 +34,24 @@ else
     echo "Building in release mode"
 fi
 
+# Install cudss
+bash ci/utils/install_cudss.sh
+
+# Clean metadata & install cudss
+if command -v dnf &> /dev/null; then
+    dnf clean all
+    # Adding static library just to please CMAKE requirements
+    dnf -y install libcudss0-static-cuda-12 libcudss0-devel-cuda-12 libcudss0-cuda-12
+elif command -v apt-get &> /dev/null; then
+    apt-get update
+    apt-get install -y libcudss-devel
+else
+    echo "Neither dnf nor apt-get found. Cannot install cudss dependencies."
+    exit 1
+fi
+# dnf -y install libcudss0-devel-cuda-12
+
+
 rapids-logger "Generating build requirements"
 
 CUOPT_MPS_PARSER_WHEELHOUSE=$(RAPIDS_PY_WHEEL_NAME="cuopt_mps_parser" rapids-download-wheels-from-github python)
@@ -62,6 +80,7 @@ EXCLUDE_ARGS=(
   --exclude "libraft.so"
   --exclude "libcublas.so.*"
   --exclude "libcublasLt.so.*"
+  --exclude "libcudss.so.*"
   --exclude "libcurand.so.*"
   --exclude "libcusolver.so.*"
   --exclude "libcusparse.so.*"

ci/utils/install_cudss.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -euo pipefail
+
+# Clean metadata & install cudss
+if command -v dnf &> /dev/null; then
+    dnf clean all
+    # Adding static library just to please CMAKE requirements
+    dnf -y install libcudss0-static-cuda-12 libcudss0-devel-cuda-12 libcudss0-cuda-12
+elif command -v apt-get &> /dev/null; then
+    apt-get update
+    apt-get install -y libcudss-devel
+else
+    echo "Neither dnf nor apt-get found. Cannot install cudss dependencies."
+    exit 1
+fi
+
+
+
+
+
+
+
+
+

conda/environments/all_cuda-128_arch-aarch64.yaml

@@ -35,6 +35,7 @@ dependencies:
 - httpx
 - ipython
 - jsonref==1.1.0
+- libcudss-dev
 - libcurand-dev
 - libcusolver-dev
 - libcusparse-dev

conda/environments/all_cuda-128_arch-x86_64.yaml

@@ -35,6 +35,7 @@ dependencies:
 - httpx
 - ipython
 - jsonref==1.1.0
+- libcudss-dev
 - libcurand-dev
 - libcusolver-dev
 - libcusparse-dev

conda/recipes/libcuopt/recipe.yaml

@@ -66,6 +66,7 @@ cache:
       - librmm =${{ dep_minor_version }}
       - rapids-logger =0.1
       - cuda-nvtx-dev
+      - libcudss-dev
       - libcurand-dev
       - libcusparse-dev
       - cuda-cudart-dev
@@ -133,6 +134,7 @@ outputs:
         - rapids-logger =0.1
         - librmm =${{ dep_minor_version }}
         - cuda-cudart-dev
+        - libcudss-dev
         - libcublas
         - libcusparse-dev
       run:
@@ -183,6 +185,7 @@ outputs:
         - gmock ${{ gtest_version }}
         - gtest ${{ gtest_version }}
         - cuda-cudart-dev
+        - libcudss-dev
         - libcublas
         - libcusparse-dev
       run:

cpp/CMakeLists.txt

@@ -250,6 +250,23 @@ list(PREPEND CUOPT_PRIVATE_CUDA_LIBS CUDA::cublasLt)
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/libmps_parser)
 set(CMAKE_LIBRARY_PATH ${CMAKE_CURRENT_BINARY_DIR}/libmps_parser/)
 
+find_package(cudss REQUIRED CONFIG)
+
+# Print all details of the cudss package
+message(STATUS "cudss package details:")
+message(STATUS "  cudss_FOUND: ${cudss_FOUND}")
+message(STATUS "  cudss_VERSION: ${cudss_VERSION}")
+message(STATUS "  cudss_INCLUDE_DIRS: ${cudss_INCLUDE_DIRS}")
+message(STATUS "  cudss_LIBRARY_DIR: ${cudss_LIBRARY_DIR}")
+message(STATUS "  cudss_LIBRARIES: ${cudss_LIBRARIES}")
+message(STATUS "  cudss_DEFINITIONS: ${cudss_DEFINITIONS}")
+message(STATUS "  cudss_COMPILE_OPTIONS: ${cudss_COMPILE_OPTIONS}")
+message(STATUS "  cudss_LINK_OPTIONS: ${cudss_LINK_OPTIONS}")
+
+# Use the specific cudss library version to avoid symlink issues
+set(CUDSS_LIB_FILE "${cudss_LIBRARY_DIR}/libcudss.so.0")
+message(STATUS "Using cudss library: ${CUDSS_LIB_FILE}")
+
 
 target_link_libraries(cuopt
   PUBLIC
@@ -260,6 +277,7 @@ target_link_libraries(cuopt
   CCCL::CCCL
   raft::raft
   cuopt::mps_parser
+  ${CUDSS_LIB_FILE}
   PRIVATE
   ${CUOPT_PRIVATE_CUDA_LIBS}
   )

cpp/src/mip/solver.cu

@@ -33,15 +33,25 @@
 #include <raft/sparse/detail/cusparse_macros.h>
 #include <raft/sparse/detail/cusparse_wrappers.h>
 
+#include <cudss.h>
+
 #include <future>
 #include <memory>
 #include <thread>
 
 namespace cuopt::linear_programming::detail {
 
+void force_link_cudss()
+{
+  cudssHandle_t handle;
+  cudssCreate(&handle);
+  cudssDestroy(handle);
+}
+
 // This serves as both a warm up but also a mandatory initial call to setup cuSparse and cuBLAS
 static void init_handler(const raft::handle_t* handle_ptr)
 {
+  force_link_cudss();
   // Init cuBlas / cuSparse context here to avoid having it during solving time
   RAFT_CUBLAS_TRY(raft::linalg::detail::cublassetpointermode(
     handle_ptr->get_cublas_handle(), CUBLAS_POINTER_MODE_DEVICE, handle_ptr->get_stream()));

dependencies.yaml

@@ -691,13 +691,15 @@ dependencies:
               - libcurand-dev
               - libcusolver-dev
               - libcusparse-dev
+              - libcudss-dev
               - cuda-nvtx-dev
           - matrix:
               cuda: "12.*"
             packages:
               - libcurand-dev
               - libcusolver-dev
               - libcusparse-dev
+              - libcudss-dev
               - cuda-nvtx-dev
               - cuda-nvvm
               - cuda-crt
@@ -714,6 +716,7 @@ dependencies:
               - nvidia-curand-cu12
               - nvidia-cusparse-cu12
               - nvidia-cusolver-cu12
+              - nvidia-cudss-cu12
               - nvidia-nvtx-cu12
           # if use_cuda_wheels=false is provided, do not add dependencies on any CUDA wheels
           # (e.g. for DLFW and pip devcontainers)
@@ -728,6 +731,7 @@ dependencies:
               - nvidia-curand
               - nvidia-cusparse
               - nvidia-cusolver
+              - nvidia-cudss
               - nvidia-nvtx
   develop:
     common:

python/libcuopt/CMakeLists.txt

@@ -69,6 +69,7 @@ set(rpaths
   "$ORIGIN/../../rapids_logger/lib64"
   "$ORIGIN/../../librmm/lib64"
   "$ORIGIN/../../nvidia/cublas/lib"
+  "$ORIGIN/../../nvidia/cu12/lib"
   "$ORIGIN/../../nvidia/curand/lib"
   "$ORIGIN/../../nvidia/cusolver/lib"
   "$ORIGIN/../../nvidia/cusparse/lib"

python/libcuopt/pyproject.toml

@@ -46,6 +46,7 @@ dependencies = [
     "cuopt-mps-parser==25.10.*,>=0.0.0a0",
     "librmm==25.10.*,>=0.0.0a0",
     "nvidia-cublas",
+    "nvidia-cudss",
     "nvidia-curand",
     "nvidia-cusolver",
     "nvidia-cusparse",
@@ -64,6 +65,7 @@ libcuopt = "libcuopt"
 select = [
     "distro-too-large-compressed",
 ]
+
 max_allowed_size_compressed = '775M'
 
 [project.scripts]