[ghactions] Bump ubuntu builds to clang12 and osx builds to gcc11

.github/workflows/build.yml

@@ -14,8 +14,8 @@ jobs:
       matrix:
         include:
           - {os: ubuntu-20.04, cc: gcc-10, cxx: g++-10}
-          - {os: ubuntu-20.04, cc: clang-10, cxx: clang++-10}
-          - {os: macos-10.15, cc: gcc-10, cxx: g++-10}
+          - {os: ubuntu-20.04, cc: clang-12, cxx: clang++-12}
+          - {os: macos-10.15, cc: gcc-11, cxx: g++-11}
           - {os: macos-10.15, cc: /usr/local/opt/llvm/bin/clang, cxx: /usr/local/opt/llvm/bin/clang++}
 
     runs-on: ${{ matrix.os }}
@@ -27,18 +27,20 @@ jobs:
       if: matrix.os == 'ubuntu-20.04'
       run: >
         sudo apt-get update &&
+        sudo apt-get install lsb-release wget software-properties-common &&
+        wget -O /tmp/llvm.sh https://apt.llvm.org/llvm.sh && sudo chmod +x /tmp/llvm.sh && sudo /tmp/llvm.sh 12 &&
         sudo apt-get install
-        clang-10
+        clang-12
         g++-10
         gfortran
         hdf5-tools
         libblas-dev
         libboost-dev
-        libclang-10-dev
-        libc++-10-dev
-        libc++abi-10-dev
+        libclang-12-dev
+        libc++-12-dev
+        libc++abi-12-dev
         libfftw3-dev
-        libgfortran4
+        libgfortran5
         libgmp-dev
         libhdf5-dev
         liblapack-dev
@@ -46,7 +48,7 @@ jobs:
         openmpi-bin
         openmpi-common
         openmpi-doc
-        python3-clang-10
+        python3-clang-12
         python3-dev
         python3-mako
         python3-matplotlib
@@ -60,7 +62,7 @@ jobs:
     - name: Install homebrew dependencies
       if: matrix.os == 'macos-10.15'
       run: |
-        brew install gcc@10 llvm boost fftw hdf5 open-mpi openblas
+        brew install gcc@11 llvm boost fftw hdf5 open-mpi openblas
         pip3 install mako numpy scipy mpi4py
         pip3 install -r requirements.txt