[CI] bump gcc version to 14 for triqs

Author: the-hampel

.github/workflows/build.yml

@@ -26,10 +26,10 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - { os: ubuntu-24.04, cxx: clang++-20, clang_cxx: clang++-20 }
-          - { os: ubuntu-24.04, cxx: g++, clang_cxx: clang++-20 }
-          - { os: macos-15, cxx: clang++, clang_cxx: clang++ }
-          - { os: macos-15, cxx: g++-15, clang_cxx: clang++ }
+          - { os: ubuntu-24.04, cc: clang-20, cxx: clang++-20, clang_cc: clang-20, clang_cxx: clang++-20 }
+          - { os: ubuntu-24.04, cc: gcc-14, cxx: g++-14, clang_cc: clang-20, clang_cxx: clang++-20 }
+          - { os: macos-15, cc: clang, cxx: clang++, clang_cc: clang, clang_cxx: clang++ }
+          - { os: macos-15, cc: gcc-15, cxx: g++-15, clang_cc: clang, clang_cxx: clang++ }
 
     runs-on: ${{ matrix.os }}
 
@@ -44,7 +44,9 @@ jobs:
           ccache-${{ matrix.os }}-${{ matrix.cxx }}-
 
     - name: Set compiler
-      run: echo "CXX=${{ matrix.cxx }}" >> $GITHUB_ENV
+      run: |
+        echo "CC=${{ matrix.cc }}" >> $GITHUB_ENV
+        echo "CXX=${{ matrix.cxx }}" >> $GITHUB_ENV
 
     - name: Install ubuntu dependencies
       if: ${{ contains(matrix.os, 'ubuntu') }}
@@ -57,8 +59,8 @@ jobs:
         ninja-build
         clang-20
         clang-tools-20
-        g++
-        gfortran
+        g++-14
+        gfortran-14
         hdf5-tools
         libboost-dev
         llvm-20-dev
@@ -113,11 +115,14 @@ jobs:
 
     - name: Build & Install clair
       env:
+        CC: ${{ matrix.clang_cc }}
         CXX: ${{ matrix.clang_cxx }}
         CXXFLAGS: ""
       run: |
         git clone https://github.com/flatironinstitute/clair --branch unstable
         cmake -S clair -B clair/build -G Ninja \
+          -DCMAKE_C_COMPILER=$CC \
+          -DCMAKE_CXX_COMPILER=$CXX \
           -DPython_EXECUTABLE=$VIRTUAL_ENV/bin/python \
           -DBuild_Tests=OFF \
           -DCMAKE_INSTALL_PREFIX=$HOME/install
@@ -130,6 +135,8 @@ jobs:
         git ls-remote --exit-code --heads https://github.com/TRIQS/triqs "$TRIQS_BRANCH" > /dev/null 2>&1 || TRIQS_BRANCH=unstable
         git clone https://github.com/TRIQS/triqs --branch "$TRIQS_BRANCH"
         cmake -S triqs -B triqs/build -G Ninja \
+          -DCMAKE_C_COMPILER=$CC \
+          -DCMAKE_CXX_COMPILER=$CXX \
           -DPython_EXECUTABLE=$VIRTUAL_ENV/bin/python \
           -DBuild_Tests=OFF \
           -DCMAKE_INSTALL_PREFIX=$HOME/install
@@ -138,7 +145,9 @@ jobs:
     - name: Build dft_tools
       run: |
         source $HOME/install/share/triqs/triqsvars.sh
-        cmake -S . -B build -G Ninja
+        cmake -S . -B build -G Ninja \
+          -DCMAKE_C_COMPILER=$CC \
+          -DCMAKE_CXX_COMPILER=$CXX
         cmake --build build --verbose
     
     - name: Print logs