Fix libomp ABI bug

.github/workflows/build.yaml

@@ -53,7 +53,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/conda-cpp-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-cpp-build.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -69,7 +69,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -84,7 +84,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@release/26.08
     secrets:
       CONDA_RAPIDSAI_NIGHTLY_TOKEN: ${{ secrets.CONDA_RAPIDSAI_NIGHTLY_TOKEN }}
       CONDA_RAPIDSAI_TOKEN: ${{ secrets.CONDA_RAPIDSAI_TOKEN }}
@@ -101,7 +101,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -119,7 +119,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@release/26.08
     secrets:
       CONDA_RAPIDSAI_WHEELS_NIGHTLY_TOKEN: ${{ secrets.CONDA_RAPIDSAI_WHEELS_NIGHTLY_TOKEN }}
       RAPIDSAI_PYPI_TOKEN: ${{ secrets.RAPIDSAI_PYPI_TOKEN }}
@@ -140,7 +140,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -157,7 +157,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@release/26.08
     secrets:
       CONDA_RAPIDSAI_WHEELS_NIGHTLY_TOKEN: ${{ secrets.CONDA_RAPIDSAI_WHEELS_NIGHTLY_TOKEN }}
       RAPIDSAI_PYPI_TOKEN: ${{ secrets.RAPIDSAI_PYPI_TOKEN }}
@@ -177,7 +177,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -197,7 +197,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@release/26.08
     secrets:
       CONDA_RAPIDSAI_WHEELS_NIGHTLY_TOKEN: ${{ secrets.CONDA_RAPIDSAI_WHEELS_NIGHTLY_TOKEN }}
       RAPIDSAI_PYPI_TOKEN: ${{ secrets.RAPIDSAI_PYPI_TOKEN }}
@@ -218,7 +218,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       node_type: "gpu-l4-latest-1"
@@ -238,7 +238,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -259,7 +259,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@release/26.08
     secrets:
       CONDA_RAPIDSAI_WHEELS_NIGHTLY_TOKEN: ${{ secrets.CONDA_RAPIDSAI_WHEELS_NIGHTLY_TOKEN }}
       RAPIDSAI_PYPI_TOKEN: ${{ secrets.RAPIDSAI_PYPI_TOKEN }}

.github/workflows/multi_gpu_cpp_test.yaml

@@ -54,7 +54,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}

.github/workflows/pr.yaml

@@ -36,7 +36,7 @@ jobs:
       - pr-test-summary
     permissions:
       contents: read
-    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@release/26.08
     if: always()
     with:
       needs: ${{ toJSON(needs) }}
@@ -64,7 +64,7 @@ jobs:
       contents: read
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/changed-files.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/changed-files.yaml@release/26.08
     with:
       files_yaml: |
         build_docs:
@@ -331,7 +331,7 @@ jobs:
   checks:
     permissions:
       contents: read
-    uses: rapidsai/shared-workflows/.github/workflows/checks.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/checks.yaml@release/26.08
     with:
       enable_check_generated_files: false
   conda-cpp-build:
@@ -348,7 +348,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/conda-cpp-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-cpp-build.yaml@release/26.08
     with:
       build_type: pull-request
       script: ci/build_cpp.sh
@@ -360,7 +360,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/conda-cpp-tests.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-cpp-tests.yaml@release/26.08
     if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_cpp
     with:
       build_type: pull-request
@@ -399,7 +399,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@release/26.08
     with:
       build_type: pull-request
       script: ci/build_python.sh
@@ -411,7 +411,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@release/26.08
     if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_python_conda
     with:
       build_type: pull-request
@@ -428,7 +428,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@release/26.08
     if: fromJSON(needs.changed-files.outputs.changed_file_groups).build_docs
     with:
       build_type: pull-request
@@ -448,7 +448,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@release/26.08
     with:
       # build for every combination of arch and CUDA version, but only for the latest Python
       matrix_filter: ${{ needs.compute-matrix-filters.outputs.libcuopt_filter }}
@@ -466,7 +466,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@release/26.08
     with:
       build_type: pull-request
       script: ci/build_wheel_cuopt.sh
@@ -480,7 +480,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@release/26.08
     if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_python_wheels
     with:
       build_type: pull-request
@@ -502,7 +502,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@release/26.08
     with:
       build_type: pull-request
       script: ci/build_wheel_cuopt_server.sh
@@ -521,7 +521,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@release/26.08
     with:
       build_type: pull-request
       script: ci/build_wheel_cuopt_sh_client.sh
@@ -539,7 +539,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@release/26.08
     if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_python_wheels
     with:
       build_type: pull-request

.github/workflows/test.yaml

@@ -35,7 +35,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/conda-cpp-tests.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-cpp-tests.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
@@ -57,7 +57,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@release/26.08
     with:
       run_codecov: false
       build_type: ${{ inputs.build_type }}
@@ -80,7 +80,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
@@ -102,7 +102,7 @@ jobs:
       id-token: write
       packages: read
       pull-requests: read
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
@@ -125,7 +125,7 @@ jobs:
       packages: read
       pull-requests: read
     secrets: inherit # zizmor: ignore[secrets-inherit]
-    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@release/26.08
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}

.github/workflows/trigger-breaking-change-alert.yaml

@@ -21,7 +21,7 @@ jobs:
     if: contains(github.event.pull_request.labels.*.name, 'breaking')
     permissions:
       contents: read
-    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@release/26.08
     secrets:
       slack-webhook-url: ${{ secrets.NV_SLACK_BREAKING_CHANGE_NOTIFIER_APP }}
     with:

RAPIDS_BRANCH

@@ -1 +1 @@
-main
+release/26.08

README.md

@@ -93,31 +93,31 @@ For CUDA 12.x:
 pip install \
   --extra-index-url=https://pypi.nvidia.com \
   nvidia-cuda-runtime-cu12==12.9.* \
-  cuopt-server-cu12==26.6.* cuopt-sh-client==26.6.*
+  cuopt-server-cu12==26.08.* cuopt-sh-client==26.08.*
 ```
 
 Development wheels are available as nightlies, please update `--extra-index-url` to `https://pypi.anaconda.org/rapidsai-wheels-nightly/simple/` to install latest nightly packages.
 ```bash
 pip install --pre \
   --extra-index-url=https://pypi.nvidia.com \
   --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple/ \
-  cuopt-server-cu12==26.6.* cuopt-sh-client==26.6.*
+  cuopt-server-cu12==26.08.* cuopt-sh-client==26.08.*
 ```
 
 For CUDA 13.x:
 
 ```bash
 pip install \
   --extra-index-url=https://pypi.nvidia.com \
-  cuopt-server-cu13==26.6.* cuopt-sh-client==26.6.*
+  cuopt-server-cu13==26.08.* cuopt-sh-client==26.08.*
 ```
 
 Development wheels are available as nightlies, please update `--extra-index-url` to `https://pypi.anaconda.org/rapidsai-wheels-nightly/simple/` to install latest nightly packages.
 ```bash
 pip install --pre \
   --extra-index-url=https://pypi.nvidia.com \
   --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple/ \
-  cuopt-server-cu13==26.6.* cuopt-sh-client==26.6.*
+  cuopt-server-cu13==26.08.* cuopt-sh-client==26.08.*
 ```
 
 
@@ -128,7 +128,7 @@ cuOpt can be installed with conda (via [miniforge](https://github.com/conda-forg
 All other dependencies are installed automatically when `cuopt-server` and `cuopt-sh-client` are installed.
 
 ```bash
-conda install -c rapidsai -c conda-forge -c nvidia cuopt-server=26.06.* cuopt-sh-client=26.06.*
+conda install -c rapidsai -c conda-forge -c nvidia cuopt-server=26.08.* cuopt-sh-client=26.08.*
 ```
 
 We also provide [nightly conda packages](https://anaconda.org/rapidsai-nightly) built from the HEAD

cpp/src/branch_and_bound/branch_and_bound.cpp

@@ -2168,9 +2168,14 @@ bool branch_and_bound_t<i_t, f_t>::launch_rins_worker(const std::vector<f_t>& so
   worker->set_active();
   worker->search_strategy = search_strategy_t::SUBMIP;
 
-#pragma omp task priority(CUOPT_DEFAULT_TASK_PRIORITY) affinity(worker) \
-  firstprivate(worker, sol) if (!settings_.inside_submip)
-  rins(worker, sol);
+  if (settings_.inside_submip) {
+    // LLVM libomp's GOMP compatibility path skips GCC's firstprivate copy
+    // function for included tasks.
+    rins(worker, sol);
+  } else {
+#pragma omp task priority(CUOPT_DEFAULT_TASK_PRIORITY) affinity(worker) firstprivate(worker, sol)
+    rins(worker, sol);
+  }
 
   return true;
 }

cpp/src/io/experimental_mps_fast/fast_parser.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights
+// SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 // reserved. SPDX-License-Identifier: Apache-2.0
 
 #include "fast_parser.hpp"
@@ -42,6 +42,7 @@
 #include <vector>
 
 #include <file_to_string.hpp>
+#include <mps_parser_internal.hpp>
 
 #define MPS_FAST_COMPACT_ROW_HASH
 #define MPS_FAST_THP_PREFAULT
@@ -2769,6 +2770,7 @@ static void finalize_qcmatrix_constraints(parse_state_t<i_t, f_t>& state)
       return std::get<1>(ea) < std::get<1>(eb);
     });
 
+    // Match reference ingest: canonicalize MPS symmetric halves to upper-triangular COO.
     qc.rows.reserve(block.entries.size());
     qc.cols.reserve(block.entries.size());
     qc.vals.reserve(block.entries.size());
@@ -2778,6 +2780,8 @@ static void finalize_qcmatrix_constraints(parse_state_t<i_t, f_t>& state)
       qc.cols.push_back(col);
       qc.vals.push_back(val);
     }
+    check_symmetric_offdiagonal_pairs(qc.rows, qc.cols, qc.vals);
+    canonicalize_coo_matrix(qc.rows, qc.cols, qc.vals);
     state.problem.quadratic_constraints_.push_back(std::move(qc));
   }