gcc5

Author: dkm

.github/actions/build-gcc/action.yml

@@ -10,6 +10,11 @@ inputs:
     description: 'Args for RUN_TEST_FLAGS'
     required: true
 
+  use-old-gcc:
+    description: 'Version to use for old GCC'
+    required: false
+    default: ''
+
   warning_file:
     description: 'Filename with expected warnings'
     required: true
@@ -56,11 +61,39 @@ runs:
       run: chmod -R a-w ./*
       shell: bash
 
+    - name: Restore cached old gcc ${{ inputs.use-old-gcc }}
+      if: inputs.use-old-gcc != ''
+      id: restore-gcc5
+      uses: actions/cache/restore@v4
+      with:
+        key: ce-tar-gcc-5
+        path: ~/gcc-5.4.0/
+
+    - name: Download and install gcc5.4
+      if: steps.restore-gcc5.outputs.cache-hit != 'true' && inputs.use-old-gcc != ''
+      shell: bash
+      run: |
+        curl "https://s3.amazonaws.com/compiler-explorer/opt/gcc-5.4.0.tar.xz" -o /tmp/gcc.tar.xz;
+        cd ~;
+        tar xvf /tmp/gcc.tar.xz
+
+    - name: Store gcc-5.4 to cache
+      id: cache-gcc5
+      if: always() && steps.restore-gcc5.outputs.cache-hit != 'true' && inputs.use-old-gcc != ''
+      uses: actions/cache/save@v4
+      with:
+        key: ce-tar-gcc-5
+        path: ~/gcc-5.4.0/
+
     - name: Configure GCC
       shell: bash
       run: |
            mkdir -p gccrs-build;
            cd gccrs-build;
+           if [ -n "${{ inputs.use-old-gcc }}" ]; then
+              export PATH=$HOME/gcc-5.4.0/bin:$PATH
+           fi
+
            if ${{ inputs.glibc_assertion }}; then
               export CXXFLAGS="$CXXFLAGS -D_GLIBCXX_ASSERTIONS"
            fi

.github/workflows/ccpp.yml

@@ -72,6 +72,26 @@ jobs:
           warning_file: 'log_expected_warnings'
           glibc_assertion: true
           enable_multilib: true
+
+  build-and-check-gcc-5:
+    env:
+      # Force locale, in particular for reproducible results re '.github/log_expected_warnings' (see below).
+      LC_ALL: C.UTF-8
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - id: build-and-test
+        uses: ./.github/actions/build-gcc
+        with:
+          extra-configure-env: ''
+          run_test_flags: '--target_board=unix\{-m32}'
+          warning_file: 'log_expected_warnings'
+          glibc_assertion: false
+          use-old-gcc: '5.4.0'
+          enable_multilib: false
 #   build-and-check-ubuntu-64bit-glibcxx:
 
 #     env:
@@ -241,7 +261,7 @@ jobs:
 #               exit 0; \
 #             fi
 
-#   build-and-check-gcc-5:
+#    build-and-check-gcc-5:
 
 #     runs-on: ubuntu-22.04
 #     env: