Reactivate MPICH runner (gcc13_py312_mpich_h5_ad2) (#1739)

* Revert "CI: Disable MPICH for now"

This reverts commit de9e7ad.

* We shall try installin MPICH from Spack for now

Ubuntu package broken https://bugs.launchpad.net/ubuntu/+source/mpich/+bug/2072338

* Take out version checks

* Revert "Take out version checks"

This reverts commit b22e4b3.

* Revert "We shall try installin MPICH from Spack for now"

This reverts commit 33b847f.

* Alternative approach: self-compiled MPICH

* Move MPICH installation to separate file

Author: franzpoeschel

.github/ci/spack-envs/gcc13_py312_mpich_h5_ad2/spack.yaml

@@ -22,8 +22,8 @@ spack:
       variants: +mpi
     mpich:
       externals:
-      - spec: mpich@4.2.0
-        prefix: /usr
+      - spec: mpich@4.2.1
+        prefix: /usr/local
       buildable: False
     perl:
       externals:

.github/workflows/dependencies/install_mpich

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+#
+
+set -eu -o pipefail
+
+mpich_ver="4.3.0"
+
+cd /opt
+wget https://www.mpich.org/static/downloads/${mpich_ver}/mpich-${mpich_ver}.tar.gz
+tar -xzf mpich-${mpich_ver}.tar.gz
+cd mpich-${mpich_ver}
+./configure --prefix=/usr/local
+make -j 4
+make -j 4 install
+cd ..
+rm -rf mpich-${mpich_ver} mpich-${mpich_ver}.tar.gz

.github/workflows/linux.yml

@@ -165,9 +165,7 @@ jobs:
   # ADIOS2 v2.10
   gcc13_py312_mpich_h5_ad2:
     runs-on: ubuntu-24.04
-    # disabled because of unclear runtime issues
-    if: 0
-    #if: github.event.pull_request.draft == false
+    if: github.event.pull_request.draft == false
     steps:
     - uses: actions/checkout@v4
     - name: Spack Cache
@@ -177,8 +175,13 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get remove openmpi* libopenmpi* *hdf5* || true
-        sudo apt-get install g++ gfortran libmpich-dev mpich python3
+        sudo apt-get install g++ gfortran python3
         sudo .github/workflows/dependencies/install_spack
+
+        # Need to build this manually due to broken MPICH package in Ubuntu 24.04
+        # https://bugs.launchpad.net/ubuntu/+source/mpich/+bug/2072338
+        sudo .github/workflows/dependencies/install_mpich
+
     - name: Build
       env: {CC: gcc, CXX: g++, MPICH_CC: gcc, MPICH_CXX: g++, CXXFLAGS: -Werror}
       run: |