Clang -> GCC

MPICH alone seems hard enough

Author: ax3l

…vs/clang14_py312_mpich_h5_ad2/spack.yaml …envs/gcc13_py312_mpich_h5_ad2/spack.yaml.github/ci/spack-envs/clang14_py312_mpich_h5_ad2/spack.yaml renamed to .github/ci/spack-envs/gcc13_py312_mpich_h5_ad2/spack.yaml .github/ci/spack-envs/clang14_py312_mpich_h5_ad2/spack.yaml renamed to .github/ci/spack-envs/gcc13_py312_mpich_h5_ad2/spack.yaml

@@ -40,7 +40,7 @@ spack:
       variants: ~fortran
       providers:
         mpi: [mpich]
-      compiler: [clang@14.0.6]
+      compiler: [gcc@13.2.0]
 
   compilers:
   - compiler:
@@ -50,11 +50,11 @@ spack:
       modules: []
       operating_system: ubuntu24.04
       paths:
-        cc: /usr/bin/clang-14
-        cxx: /usr/bin/clang++-14
+        cc: /usr/bin/gcc
+        cxx: /usr/bin/g++
         f77: /usr/bin/gfortran
         fc: /usr/bin/gfortran
-      spec: clang@14.0.6
+      spec: gcc@13.2.0
       target: x86_64
 
   config:

.github/workflows/linux.yml

@@ -160,30 +160,30 @@ jobs:
         ctest --test-dir build --output-on-failure
 
   # ADIOS2 v2.10
-  clang14_py312_mpich_h5_ad2:
+  gcc13_py312_mpich_h5_ad2:
     runs-on: ubuntu-24.04
     if: github.event.pull_request.draft == false
     steps:
     - uses: actions/checkout@v4
     - name: Spack Cache
       uses: actions/cache@v3
-      with: {path: /opt/spack, key: clang14_py312_mpich_h5_ad2_newLayout_v2 }
+      with: {path: /opt/spack, key: gcc13_py312_mpich_h5_ad2 }
     - name: Install
       run: |
         sudo apt-get update
         sudo apt-get remove openmpi* libopenmpi* *hdf5* || true
-        sudo apt-get install clang-14 gfortran libmpich-dev mpich python3
+        sudo apt-get install g++ gfortran libmpich-dev mpich python3
         sudo .github/workflows/dependencies/install_spack
     - name: Build
-      env: {CC: clang-14, CXX: clang++-14, MPICH_CC: clang-14, MPICH_CXX: clang++-14}
+      env: {CC: gcc, CXX: g++, MPICH_CC: gcc, MPICH_CXX: g++}
       # TODO: CXXFLAGS: -Werror removed because it fails CMake's find_package(MPI)
       run: |
         cmake --version
         mpiexec --version
         mpicxx --version
         perl --version
         python --version
-        eval $(spack env activate --sh .github/ci/spack-envs/clang14_py312_mpich_h5_ad2/)
+        eval $(spack env activate --sh .github/ci/spack-envs/gcc13_py312_mpich_h5_ad2/)
         spack install
 
         share/openPMD/download_samples.sh build