Hotfix broken MPICH package in Ubuntu 24.04 LTS

.github/workflows/ci.yml

@@ -24,15 +24,31 @@ jobs:
         os:
           - ubuntu-24.04
           - ubuntu-22.04
+          - ubuntu-24.04-arm
+          - ubuntu-22.04-arm
+          - macos-15
           - macos-14
           - macos-13
+          - windows-2025
           - windows-2022
           - windows-2019
         exclude:
           - os: ubuntu-24.04
             mpi: msmpi
           - os: ubuntu-22.04
             mpi: msmpi
+          - os: ubuntu-24.04-arm
+            mpi: intelmpi
+          - os: ubuntu-22.04-arm
+            mpi: intelmpi
+          - os: ubuntu-24.04-arm
+            mpi: msmpi
+          - os: ubuntu-22.04-arm
+            mpi: msmpi
+          - os: macos-15
+            mpi: intelmpi
+          - os: macos-15
+            mpi: msmpi
           - os: macos-14
             mpi: intelmpi
           - os: macos-14
@@ -41,6 +57,10 @@ jobs:
             mpi: intelmpi
           - os: macos-13
             mpi: msmpi
+          - os: windows-2025
+            mpi: mpich
+          - os: windows-2025
+            mpi: openmpi
           - os: windows-2022
             mpi: mpich
           - os: windows-2022
@@ -120,6 +140,14 @@ jobs:
         mpiexec /help3
       if: ${{ runner.os == 'Windows' && matrix.mpi == 'msmpi' }}
 
+    - name: Build MPI application
+      run:  mpicc helloworld.c -o helloworld.exe
+      if: ${{ runner.os != 'Windows' }}
+
+    - name: Execute MPI application
+      run:  mpiexec -n 5 ./helloworld.exe
+      if: ${{ runner.os != 'Windows' }}
+
   Linux:
     runs-on: ubuntu-latest
     steps:

helloworld.c

@@ -0,0 +1,24 @@
+#include <mpi.h>
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+  int size, rank, len;
+  char name[MPI_MAX_PROCESSOR_NAME];
+
+  MPI_Init(&argc, &argv);
+  MPI_Comm_size(MPI_COMM_WORLD, &size);
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  MPI_Get_processor_name(name, &len);
+
+  if (rank != 0)
+    MPI_Recv(name, 0 , MPI_BYTE, rank-1, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
+
+  printf("Hello, World! I am process %d of %d on %s.\n", rank, size, name);
+
+  if (rank != size - 1)
+    MPI_Send(name, 0 , MPI_BYTE, rank+1, 0, MPI_COMM_WORLD);
+
+  MPI_Finalize();
+  return 0;
+}

setup-mpi.sh

@@ -23,6 +23,30 @@ sudo () {
     "$@"
 }
 
+hotfix-apt-ubuntu-noble-mpich() {
+    grep -q 'ID=ubuntu' /etc/os-release || return 0
+    grep -q 'VERSION_CODENAME=noble' /etc/os-release || return 0
+    command -v curl > /dev/null || apt install -y -q curl
+    echo "Hotfix broken MPICH package in Ubuntu 24.04 LTS"
+    echo "https://bugs.launchpad.net/ubuntu/+source/mpich/+bug/2072338"
+    case "$(arch)" in
+        aarch64) arch=arm64 repo=https://ports.ubuntu.com/ubuntu-ports;;
+        x86_64)  arch=amd64 repo=https://archive.ubuntu.com/ubuntu;;
+    esac
+    libucx0=libucx0_1.17.0+ds-3build1_$arch.deb
+    libmpich12=libmpich12_4.2.0-14_$arch.deb
+    curl -sSO $repo/pool/universe/u/ucx/$libucx0
+    curl -sSO $repo/pool/universe/m/mpich/$libmpich12
+    tmpdir=$(mktemp -d)
+    dpkg-deb -x $libucx0 $tmpdir
+    dpkg-deb -x $libmpich12 $tmpdir
+    libdir=/usr/lib/$(arch)-linux-gnu
+    sudo cp -r $tmpdir$libdir/ucx $libdir
+    sudo cp $tmpdir$libdir/libuc[mpst]*.so.0.*.* $libdir
+    sudo cp $tmpdir$libdir/libmpich*.so.12.*.* $libdir
+    rm -rf $tmpdir $libucx0 $libmpich12
+}
+
 setup-apt-intel-oneapi () {
     # ensure the required packages are installed
     sudo apt update
@@ -106,6 +130,7 @@ case $(uname) in
         case $MPI in
             mpich)
                 sudo apt install -y -q mpich libmpich-dev
+                hotfix-apt-ubuntu-noble-mpich
                 ;;
             openmpi)
                 sudo apt install -y -q openmpi-bin libopenmpi-dev