luca-heltai · Oct 20, 2026 · Oct 20, 2026 · Oct 20, 2026 · Oct 20, 2026
diff --git a/.github/workflows/indentation.yml b/.github/workflows/indentation.yml
@@ -11,6 +11,7 @@ jobs:
 
     runs-on: ubuntu-latest
     container:
+      # Formatting is pinned to clang-format 16.0.6 independently of deal.II.
       image: dealii/dealii:v9.7.1-noble
       options: --user root --env OMPI_ALLOW_RUN_AS_ROOT=1 --env OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1
 

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
@@ -7,42 +7,25 @@ on:
     branches: [ master ]
 
 jobs:
-  debug:
-
-    runs-on: ubuntu-latest
-
-    container:
-      image: dealii/dealii:v9.7.1-noble
-      options: --user root --env OMPI_ALLOW_RUN_AS_ROOT=1 --env OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1
-
-    steps:
-    - uses: actions/checkout@v2
-    - name: Test debug
-      run: |
-         rm -rf build_linux_debug
-         mkdir build_linux_debug
-         cd build_linux_debug
-         cmake .. -GNinja -DCMAKE_CXX_FLAGS=-Werror -DCMAKE_BUILD_TYPE=Debug
-         ninja
-         ctest -N
-         ctest --output-on-failure
-
-  release:
-
+  debug-and-release:
     runs-on: ubuntu-latest
-
-    container:
-      image: dealii/dealii:v9.7.1-noble
-      options: --user root --env OMPI_ALLOW_RUN_AS_ROOT=1 --env OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1
-
     steps:
-    - uses: actions/checkout@v2
-    - name: Test release
+    - uses: actions/checkout@v4
+    - name: Build deal.II 9.8.0 CI environment
+      run: docker build -f docker/Dockerfile.ci -t pi-bem-ci:9.8.0 .
+    - name: Test Debug and Release without compiler warnings
       run: |
-          rm -rf build_linux_release
-          mkdir build_linux_release
-          cd build_linux_release
-          cmake .. -GNinja -DCMAKE_CXX_FLAGS=-Werror -DCMAKE_BUILD_TYPE=Release
-          ninja
-          ctest -N
-          ctest --output-on-failure
+        docker run --rm \
+          -e OMPI_ALLOW_RUN_AS_ROOT=1 -e OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1 \
+          -v "$PWD:/workspace" -w /workspace pi-bem-ci:9.8.0 bash -lc '
+            set -e
+            cmake -S . -B build-docker/9.8.0-ci -GNinja \
+              -DCMAKE_BUILD_TYPE=DebugRelease -DCMAKE_CXX_FLAGS=-Werror \
+              -DCMAKE_EXE_LINKER_FLAGS=-fuse-ld=mold \
+              -DCMAKE_SHARED_LINKER_FLAGS=-fuse-ld=mold
+            cmake --build build-docker/9.8.0-ci -j 2
+            test -x build-docker/9.8.0-ci/bem_fma_3d
+            test -x build-docker/9.8.0-ci/bem_fma_3d.g
+            cd build-docker/9.8.0-ci
+            ctest --output-on-failure
+          '
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -39,7 +39,7 @@ ENDIF()
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
 
-FIND_PACKAGE(deal.II 9.7.1 REQUIRED
+FIND_PACKAGE(deal.II 9.8.0 REQUIRED
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
 )
 

diff --git a/README.md b/README.md
@@ -69,7 +69,7 @@ Just follow the [instructions](https://github.com/dealii/dealii/wiki/deal.II-in-
 We provide the possibility of using Docker as a tool to provide a fully operational environment for our library. To use such tool you need to install Docker following the [instructions](https://docs.docker.com/engine/installation/) provided by its authors. Then you can execute the following command line instruction
 
 ```
-docker run -v `pwd`:/pwd_to_your_own_directory/ -i -t dealii/dealii:v9.7.1-noble bash
+docker run -v `pwd`:/pwd_to_your_own_directory/ -i -t dealii/dealii:v9.8.0-resolute-r1-arm64 bash
 ```
 
 to retrieve the environment. In such a shell you can easily compile the pi-BEM library following its own instructions.

diff --git a/VERSION b/VERSION
@@ -1 +1 @@
-9.7.1
+9.8.0
diff --git a/docker/Dockerfile b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM dealii/dealii:v9.7.1-noble
+FROM dealii/dealii:v9.8.0-resolute-r1-arm64
 
 # pi-BEM master image
 RUN git clone https://github.com/mathLab/pi-BEM/ &&\

diff --git a/docker/Dockerfile.ci b/docker/Dockerfile.ci
@@ -0,0 +1,20 @@
+# Bootstrap the exact 9.8.0 release for hosted CI while the versioned
+# docker-files PR 90 image is available locally but not yet in Docker Hub.
+FROM ubuntu:26.04
+
+ARG DEAL_II_PACKAGE_VERSION=9.8.0-1~ubuntu26.04.1~ppa2
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+       ca-certificates software-properties-common \
+    && add-apt-repository -y ppa:ginggs/deal.ii-9.8.0-backports \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends \
+       libdeal.ii-dev=${DEAL_II_PACKAGE_VERSION} \
+       build-essential cmake ninja-build git numdiff \
+    && rm -rf /var/lib/apt/lists/*
+# Linking Debug deal.II consumers with the default linker dominates test time.
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends mold \
+    && rm -rf /var/lib/apt/lists/*
+WORKDIR /workspace
diff --git a/docs/complex-robin.md b/docs/complex-robin.md
@@ -1,16 +1,16 @@
 # Multiple potentials, complex problems and Robin conditions
 
-## Build and run with deal.II 9.7.1
+## Build and run with deal.II 9.8.0
 
 From the repository root, build both configurations in the supplied container:
 
 ```sh
 docker run --rm -v "$PWD:/workspace" -w /workspace \
-  dealii/dealii:v9.7.1-noble bash -lc '
-    cmake -S . -B build-docker/9.7.1 -GNinja \
+  dealii/dealii:v9.8.0-resolute-r1-arm64 bash -lc '
+    cmake -S . -B build-docker/9.8.0 -GNinja \
       -DCMAKE_BUILD_TYPE=DebugRelease -DCMAKE_CXX_FLAGS=-Werror &&
-    cmake --build build-docker/9.7.1 -j 4 &&
-    cd build-docker/9.7.1 && ctest --output-on-failure
+    cmake --build build-docker/9.8.0 -j 4 &&
+    cd build-docker/9.8.0 && ctest --output-on-failure
   '
 ```
 
@@ -24,13 +24,13 @@ The sphere examples use paths relative to `samples/`. Keep each run's output
 separate, and copy both the parameter file and its grid directory:
 
 ```sh
-mkdir -p build-docker/9.7.1/example-complex
-cp -R samples/grids build-docker/9.7.1/example-complex/
+mkdir -p build-docker/9.8.0/example-complex
+cp -R samples/grids build-docker/9.8.0/example-complex/
 cp samples/ref_params_sphere_complex_DR_direct.prm \
-  build-docker/9.7.1/example-complex/parameters_bem_3.prm
+  build-docker/9.8.0/example-complex/parameters_bem_3.prm
 docker run --rm -v "$PWD:/workspace" \
-  -w /workspace/build-docker/9.7.1/example-complex \
-  dealii/dealii:v9.7.1-noble bash -lc '
+  -w /workspace/build-docker/9.8.0/example-complex \
+  dealii/dealii:v9.8.0-resolute-r1-arm64 bash -lc '
     mpirun -np 2 ../bem_fma_3d 2
   '
 ```
@@ -42,6 +42,28 @@ The samples cover real/complex potentials, DN (Dirichlet/Neumann), DR
 `Direct` assembles integral matrices and uses an iterative solver; it does not
 mean a dense direct factorization. FMA is supported in 3D only.
 
+## Hosted CI environment
+
+Local validation uses `dealii/dealii:v9.8.0-resolute-r1-arm64`, built from
+the frozen recipes in [docker-files PR 90](https://github.com/dealii/docker-files/pull/90).
+Until that image is published, hosted CI builds `docker/Dockerfile.ci` with the
+exact deal.II 9.8.0 backports package on Ubuntu 26.04. This supports hosted AMD64
+runners without depending on a tag that currently exists only locally.
+The CI environment uses mold to link the large Debug libraries efficiently.
+The formatting job retains clang-format 16.0.6 from its existing image.
+
+To reproduce the hosted environment locally, build it and substitute
+`pi-bem-ci:9.8.0` for the image in the commands above:
+
+```sh
+docker build -f docker/Dockerfile.ci -t pi-bem-ci:9.8.0 .
+```
+
+The deal.II 9.8 update replaces the removed three-argument Trilinos vector
+`reinit(source,false,true)` with assignment into the already initialized
+ghost layout. The assignment imports both locally owned and ghost values;
+it must participate collectively on the vector communicator.
+
 ## Components and boundary-function slots
 
 `Potential components` counts real-valued storage components. Each complex

diff --git a/include/constrained_matrix.h b/include/constrained_matrix.h
@@ -86,7 +86,7 @@ void
 ConstrainedOperator<VEC, MATRIX>::vmult(VEC &dst, const VEC &src) const
 {
   VEC loc_src(constr_cpu_set);
-  loc_src.reinit(src, false, true);
+  loc_src = src;
 
   matrix.vmult(dst, src);
 

diff --git a/include/constrained_matrix_complex.h b/include/constrained_matrix_complex.h
@@ -91,7 +91,7 @@ ConstrainedComplexOperator<VEC, MATRIX>::vmult(VEC &dst, const VEC &src) const
   auto offset = matrix.this_cpu_set.size();
   // store localized constrained values
   VEC loc_src(constr_cpu_set_complex);
-  loc_src.reinit(src, false, true);
+  loc_src = src;
 
   // split into real, imag
   c_src      = 0;
@@ -258,7 +258,7 @@ BlockConstrainedComplexOperator<VEC, MATRIX>::vmult(VEC       &dst,
   localized_src.reinit(parallel_partitioning, mpi_communicator);
   for (unsigned int i = 0; i < src.n_blocks(); ++i)
     {
-      localized_src.block(i).reinit(src.block(i), false, true);
+      localized_src.block(i) = src.block(i);
     }
 
   matrix.vmult(dst.block(0), dst.block(1), src.block(0), src.block(1));

diff --git a/include/true_constrained_matrix.h b/include/true_constrained_matrix.h
@@ -116,7 +116,7 @@ ConstrainedOperator<VEC, MATRIX>::constraint_vmult(VEC       &dst,
                                                    const VEC &src) const
 {
   VEC loc_src(src.locally_owned_elements(), constr_cpu_set, mpi_communicator);
-  loc_src.reinit(src, false, true);
+  loc_src = src;
 
   for (unsigned int i = 0; i < dst.size(); ++i)
     {

diff --git a/scripts/docker.sh b/scripts/docker.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 # Open the supported deal.II environment in the current checkout.
-exec docker run --rm -it -v "$PWD:/app" -w /app dealii/dealii:v9.7.1-noble bash
+exec docker run --rm -it -v "$PWD:/app" -w /app dealii/dealii:v9.8.0-resolute-r1-arm64 bash
diff --git a/scripts/dr.sh b/scripts/dr.sh
@@ -1,4 +1,4 @@
 #!/bin/sh
 # Run a shell command in the supported deal.II environment.
 exec docker run --user "$(id -u):$(id -g)" -it --rm \
-  -v "$PWD:/app" -w /app dealii/dealii:v9.7.1-noble /bin/sh -c "$*"
+  -v "$PWD:/app" -w /app dealii/dealii:v9.8.0-resolute-r1-arm64 /bin/sh -c "$*"
diff --git a/scripts/run_docker.sh b/scripts/run_docker.sh
@@ -1,4 +1,4 @@
 #!/bin/sh
 # Run the same warning-free Debug/Release checks used for releases.
-exec docker run --rm -v "$PWD:/app" -w /app dealii/dealii:v9.7.1-noble \
-  bash -lc 'set -e; cmake -S . -B build-docker/9.7.1 -GNinja -DCMAKE_BUILD_TYPE=DebugRelease -DCMAKE_CXX_FLAGS=-Werror; cmake --build build-docker/9.7.1 -j 4; cd build-docker/9.7.1; ctest --output-on-failure'
+exec docker run --rm -v "$PWD:/workspace" -w /workspace dealii/dealii:v9.8.0-resolute-r1-arm64 \
+  bash -lc 'set -e; cmake -S . -B build-docker/9.8.0 -GNinja -DCMAKE_BUILD_TYPE=DebugRelease -DCMAKE_CXX_FLAGS=-Werror; cmake --build build-docker/9.8.0 -j 4; cd build-docker/9.8.0; ctest --output-on-failure'
diff --git a/source/bem_problem.cc b/source/bem_problem.cc
@@ -2990,9 +2990,9 @@ BEMProblem<dim>::compute_gradients(
   // We need the solution to be stored on a parallel vector with ghost
   // elements. We let Trilinos take care of it.
   TrilinosWrappers::MPI::Vector phi(ghosted_set);
-  phi.reinit(glob_phi, false, true);
+  phi = glob_phi;
   TrilinosWrappers::MPI::Vector dphi_dn(ghosted_set);
-  dphi_dn.reinit(glob_dphi_dn, false, true);
+  dphi_dn = glob_dphi_dn;
 
   // We reinit the gradient solution
   get_vector_gradients_solution().reinit(vector_this_cpu_set, mpi_communicator);
@@ -3143,7 +3143,7 @@ BEMProblem<dim>::compute_surface_gradients(
 {
   Teuchos::TimeMonitor          LocalTimer(*SurfaceGradientTime);
   TrilinosWrappers::MPI::Vector phi(ghosted_set);
-  phi.reinit(tmp_rhs, false, true);
+  phi = tmp_rhs;
 
   get_vector_surface_gradients_solution().reinit(vector_this_cpu_set,
                                                  mpi_communicator);