diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..c98521f
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,46 @@
+name: ci
+
+on:
+  #push:
+  #  branches:
+  #    - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+permissions:
+  contents: read
+
+jobs:
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-22.04
+          - macos-13
+
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Setup MPICH
+      uses: mpi4py/setup-mpi@v1
+      with:
+        mpi: mpich
+
+    - name: Setup Open MPI
+      uses: mpi4py/setup-mpi@v1
+      with:
+        mpi: openmpi
+
+    - name: Build
+      run:  make
+
+    - name: Test
+      if:   false
+      run:  make check
diff --git a/test.sh b/test.sh
index 71ed03d..9d2d88c 100755
--- a/test.sh
+++ b/test.sh
@@ -2,40 +2,71 @@
 
 set -x
 
-if [ `uname -s` == Darwin ] ; then
-    OMPIRUN=/opt/homebrew/Cellar/open-mpi/4.1.5/bin/mpirun
-    OMPILIB=/opt/homebrew/Cellar/open-mpi/4.1.5/lib/libmpi.dylib
-    MPICHRUN=/opt/homebrew/Cellar/mpich/4.1.1/bin/mpirun
-    MPICHLIB=/opt/homebrew/Cellar/mpich/4.1.1/lib/libmpi.dylib
+if [ $(uname -s) == Darwin ]; then
+    OMPIRUN=/opt/homebrew/Cellar/open-mpi/*/bin/mpirun
+    OMPILIB=/opt/homebrew/Cellar/open-mpi/*/lib/libmpi.dylib
+    MPICHRUN=/opt/homebrew/Cellar/mpich/*/bin/mpirun
+    MPICHLIB=/opt/homebrew/Cellar/mpich/*/lib/libmpi.dylib
     IMPIRUN=true
     IMPILIB=
     DBG=lldb
     DBGARGS="--one-line 'run' --one-line-on-crash 'bt' --one-line 'quit' --"
 else
+    OSID=$(grep '^ID=' /etc/os-release | cut -d= -f2)
     export HWLOC_COMPONENTS=-gl
+    if [ "$OSID" == "ubuntu" ]; then
+        OMPIRUN="/usr/bin/mpirun.openmpi --tag-output"
+        OMPILIB=/usr/lib/x86_64-linux-gnu/libmpi.so
+        MPICHRUN="/usr/bin/mpirun.mpich -l"
+        MPICHLIB=/usr/lib/x86_64-linux-gnu/libmpich.so
+    fi
+    if [ "$OSID" == "fedora" ]; then
+        OMPIRUN="/usr/lib64/openmpi/bin/mpirun --tag-output"
+        OMPILIB=/usr/lib64/openmpi/lib/libmpi.so
+        MPICHRUN="/usr/lib64/mpich/bin/mpirun -l"
+        MPICHLIB=/usr/lib64/mpich/lib/libmpi.so
+    fi
+    if [ -e /opt/intel/oneapi/mpi/latest ]; then
+       IMPIRUN="/opt/intel/oneapi/mpi/latest/bin/mpirun -l"
+       IMPILIB=/opt/intel/oneapi/mpi/2021.8.0/liblibmpi.so
+    fi
     #OPTS="--mca osc ucx"
-    OMPIRUN="/usr/bin/mpirun.openmpi --tag-output"
-    OMPILIB=/usr/lib/x86_64-linux-gnu/libmpi.so
+    #OMPIRUN="/usr/bin/mpirun.openmpi --tag-output"
+    #OMPILIB=/usr/lib/x86_64-linux-gnu/libmpi.so
     #OMPIRUN=/opt/ompi/gcc-debug/bin/mpirun
     #OMPILIB=/opt/ompi/gcc-debug/lib/libmpi.so
-    MPICHRUN="/usr/bin/mpirun.mpich -l"
-    MPICHLIB=/usr/lib/x86_64-linux-gnu/libmpich.so
+    #MPICHRUN="/usr/bin/mpirun.mpich -l"
+    #MPICHLIB=/usr/lib/x86_64-linux-gnu/libmpich.so
     #MPICHRUN="/opt/mpich/gcc/debug-ch4ucx/bin/mpirun -l"
     #MPICHLIB=/opt/mpich/gcc/debug-ch4ucx/lib/libmpi.so
-    IMPIRUN="/opt/intel/oneapi/mpi/2021.8.0/bin/mpirun -l"
-    IMPILIB=/opt/intel/oneapi/mpi/2021.8.0/lib/debug/libmpi.so
+    #IMPIRUN="/opt/intel/oneapi/mpi/2021.8.0/bin/mpirun -l"
+    #IMPILIB=/opt/intel/oneapi/mpi/2021.8.0/lib/debug/libmpi.so
     #IMPILIB=/opt/intel/oneapi/mpi/2021.8.0/lib/release/libmpi.so
     DBG=gdb
     DBGARGS='-ex "set width 1000" -ex "thread apply all bt" -ex run -ex bt -ex "set confirm off" -ex quit --args'
 fi
 
+if [ "$GITHUB_ACTIONS" == "true" ]; then
+    DBG=false
+    DBGARGS=
+fi
+
 NP=2
 #OPTS="${OPTS} -quiet"
 
-make -j $1 && \
-MPI_LIB=${OMPILIB} ${OMPIRUN} ${OPTS} -n ${NP} $1 || \
-MPI_LIB=${OMPILIB} ${OMPIRUN} ${OPTS} -n ${NP} ${DBG} ${DBGARGS} $1 ; \
-MPI_LIB=${MPICHLIB} ${MPICHRUN} -n ${NP} $1 || \
-MPI_LIB=${MPICHLIB} ${MPICHRUN} -n ${NP} ${DBG} ${DBGARGS} $1
-MPI_LIB=${IMPILIB} ${IMPIRUN} -n ${NP} $1 || \
-MPI_LIB=${IMPILIB} ${IMPIRUN} -n ${NP} ${DBG} ${DBGARGS} $1
+make -j $1
+
+if [ -n "${OMPILIB}" ]; then
+    MPI_LIB=${OMPILIB} ${OMPIRUN} ${OPTS} -n ${NP} $1 || \
+    MPI_LIB=${OMPILIB} ${OMPIRUN} ${OPTS} -n ${NP} ${DBG} ${DBGARGS} $1 ; \
+fi
+
+if [ -n "${MPICHLIB}" ]; then
+    MPI_LIB=${MPICHLIB} ${MPICHRUN} -n ${NP} $1 || \
+    MPI_LIB=${MPICHLIB} ${MPICHRUN} -n ${NP} ${DBG} ${DBGARGS} $1
+fi
+
+if [ -n "${IMPILIB}" ]; then
+   MPI_LIB=${IMPILIB} ${IMPIRUN} -n ${NP} $1 || \
+   MPI_LIB=${IMPILIB} ${IMPIRUN} -n ${NP} ${DBG} ${DBGARGS} $1
+fi