Fix Linux wheel policy

Author: ciaranra

.github/workflows/python-release.yml

@@ -90,16 +90,14 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          # Linux x86_64 with CUDA support (uses GCC Toolset 13 for CUDA compatibility)
+          # Linux x86_64 with CUDA support. Use the manylinux 2.34 image's
+          # default GCC 11 toolchain: CUDA 12.6 supports GCC 6.x-13.2, while
+          # GCC 13 emits libstdc++ symbols newer than auditwheel's
+          # manylinux_2_35 policy allows.
           - os: ubuntu-latest
             architecture: x86_64
             cibw_archs: x86_64
             install_cuda: true
-            # GCC Toolset 13 paths for CUDA compatibility
-            gcc_path_prefix: "/opt/rh/gcc-toolset-13/root/usr/bin:"
-            gcc_ld_path: "/opt/rh/gcc-toolset-13/root/usr/lib64:/opt/rh/gcc-toolset-13/root/usr/lib:"
-            gcc_cc: "/opt/rh/gcc-toolset-13/root/usr/bin/gcc"
-            gcc_cxx: "/opt/rh/gcc-toolset-13/root/usr/bin/g++"
           # Linux aarch64 - temporarily disabled while the LLVM 21.1
           # manylinux_2_34 bootstrap is validated on the primary x86_64 lane.
           # - os: ubuntu-24.04-arm
@@ -209,10 +207,9 @@ jobs:
           CIBW_ARCHS_LINUX: ${{ matrix.cibw_archs }}
           CIBW_MANYLINUX_X86_64_IMAGE: "manylinux_2_34"
           CIBW_MANYLINUX_AARCH64_IMAGE: "manylinux_2_34"
-          # Linux configuration - GCC Toolset and CUDA paths are conditional via matrix variables
+          # Linux configuration - CUDA paths are conditional via matrix variables
           CIBW_ENVIRONMENT_LINUX: >
-            PATH=${{ matrix.gcc_path_prefix }}$HOME/.cargo/bin:$HOME/.pecos/deps/llvm-21.1/bin:$HOME/.pecos/deps/cmake-${{ env.PECOS_CMAKE_VERSION }}/bin:/usr/local/cuda-12.6/bin:$PATH
-            LD_LIBRARY_PATH=${{ matrix.gcc_ld_path }}$HOME/.pecos/deps/llvm-21.1/lib:$LD_LIBRARY_PATH
+            PATH=$HOME/.cargo/bin:$HOME/.pecos/deps/llvm-21.1/bin:$HOME/.pecos/deps/cmake-${{ env.PECOS_CMAKE_VERSION }}/bin:/usr/local/cuda-12.6/bin:$PATH
             LLVM_SYS_211_PREFIX=$HOME/.pecos/deps/llvm-21.1
             LIBCLANG_PATH=$HOME/.pecos/deps/llvm-21.1/lib
             CMAKE=$HOME/.pecos/deps/cmake-${{ env.PECOS_CMAKE_VERSION }}/bin/cmake
@@ -224,9 +221,6 @@ jobs:
             dnf install -y bzip2 libffi-devel xz
             # Install CUDA Toolkit for GPU support on x86_64 (compile-time only, no GPU needed)
             if [ "${{ matrix.install_cuda }}" = "true" ]; then
-              echo "Installing GCC 13 (required for CUDA 12.6 compatibility)..."
-              dnf install -y gcc-toolset-13
-              source /opt/rh/gcc-toolset-13/enable
               echo "Installing CUDA Toolkit from NVIDIA repos..."
               . /etc/os-release
               CUDA_RHEL_MAJOR="${VERSION_ID%%.*}"
@@ -244,7 +238,7 @@ jobs:
             cargo run --locked --release -p pecos-cli -- llvm configure "$HOME/.pecos/deps/llvm-21.1"
             cargo run --locked --release -p pecos-cli -- install cmake --force
           CIBW_REPAIR_WHEEL_COMMAND_LINUX: >
-            auditwheel repair -w {dest_dir} {wheel} &&
+            auditwheel repair --plat manylinux_2_35_${{ matrix.cibw_archs }} -w {dest_dir} {wheel} &&
             pipx run abi3audit --strict --report {wheel}
           # macOS configuration
           CIBW_ENVIRONMENT_MACOS: >
@@ -328,7 +322,7 @@ jobs:
             bash scripts/ci/install-llvm-21-conda-linux.sh
             cargo run --locked --release -p pecos-cli -- llvm configure "$HOME/.pecos/deps/llvm-21.1"
           CIBW_REPAIR_WHEEL_COMMAND_LINUX: >
-            auditwheel repair -w {dest_dir} {wheel} &&
+            auditwheel repair --plat manylinux_2_35_${{ matrix.cibw_archs }} -w {dest_dir} {wheel} &&
             pipx run abi3audit --strict --report {wheel}
           CIBW_ENVIRONMENT_MACOS: >
             PATH=$HOME/.cargo/bin:$HOME/.pecos/deps/llvm-21.1/bin:$PATH