[ghactions] Synchronize build workflow with main branch

.github/workflows/build.yml

@@ -5,6 +5,19 @@ on:
     branches: [ 1.0.x ]
   pull_request:
     branches: [ 1.0.x ]
+  workflow_call:
+  workflow_dispatch:
+
+env:
+  CMAKE_C_COMPILER_LAUNCHER: ccache
+  CMAKE_CXX_COMPILER_LAUNCHER: ccache
+  CCACHE_COMPILERCHECK: content
+  CCACHE_BASEDIR: ${{ github.workspace }}
+  CCACHE_DIR: ${{ github.workspace }}/.ccache
+  CCACHE_MAXSIZE: 500M
+  CCACHE_SLOPPINESS: pch_defines,time_macros,include_file_mtime,include_file_ctime
+  CCACHE_COMPRESS: "1"
+  CCACHE_COMPRESSLEVEL: "1"
 
 jobs:
   build:
@@ -16,18 +29,26 @@ jobs:
           - {os: ubuntu-22.04, cc: gcc-12, cxx: g++-12, doc: OFF}
           - {os: ubuntu-22.04, cc: clang-15, cxx: clang++-15, doc: ON}
           #- {os: macos-12, cc: gcc-12, cxx: g++-12, doc: OFF}
-          #- {os: macos-12, cc: /usr/local/opt/llvm/bin/clang, cxx: /usr/local/opt/llvm/bin/clang++, doc: OFF}
+          #- {os: macos-12, cc: clang, cxx: clang++, doc: OFF}
 
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
+
+    - uses: actions/cache/restore@v3
+      with:
+        path: ${{ env.CCACHE_DIR }}
+        key: ccache-${{ matrix.os }}-${{ matrix.cc }}-${{ github.run_id }}
+        restore-keys:
+          ccache-${{ matrix.os }}-${{ matrix.cc }}-
 
     - name: Install ubuntu dependencies
       if: matrix.os == 'ubuntu-22.04'
       run: >
         sudo apt-get update &&
         sudo apt-get install
+        ccache
         clang-15
         g++-12
         hdf5-tools
@@ -50,8 +71,19 @@ jobs:
     - name: Install homebrew dependencies
       if: matrix.os == 'macos-12'
       run: |
-        brew install gcc@12 llvm hdf5 open-mpi openblas
-        pip3 install mako
+        brew install ccache gcc@12 llvm hdf5 open-mpi openblas
+        mkdir $HOME/.venv
+        python3 -m venv $HOME/.venv/my_python
+        source $HOME/.venv/my_python/bin/activate
+        pip install mako
+        echo "VIRTUAL_ENV=$VIRTUAL_ENV" >> $GITHUB_ENV
+        echo "PATH=$PATH" >> $GITHUB_ENV
+
+    - name: add clang cxxflags
+      if: ${{ contains(matrix.cxx, 'clang') }}
+      run: |
+        echo "PATH=/usr/local/opt/llvm/bin:$PATH" >> $GITHUB_ENV
+        echo "CXXFLAGS=-stdlib=libc++" >> $GITHUB_ENV
 
     - name: Build cppdlr
       env:
@@ -65,10 +97,21 @@ jobs:
     - name: Test cppdlr
       env:
         DYLD_FALLBACK_LIBRARY_PATH: /usr/local/opt/llvm/lib
+        OPENBLAS_NUM_THREADS: "1"
       run: |
         cd build
         ctest -j2 --output-on-failure
 
+    - name: ccache statistics
+      if: always()
+      run: ccache -sv
+
+    - uses: actions/cache/save@v3
+      if: always()
+      with:
+        path: ${{ env.CCACHE_DIR }}
+        key: ccache-${{ matrix.os }}-${{ matrix.cc }}-${{ github.run_id }}
+
     - name: Deploy documentation to website
       if: matrix.doc == 'ON' && github.ref == 'refs/heads/1.0.x'
       uses: JamesIves/github-pages-deploy-action@v4