Fix SIGILL crashes on GitHub runners via CPU-aware build cache keys (#1278)

Author: sbryngelson

.github/workflows/coverage.yml

@@ -35,11 +35,22 @@ jobs:
       - name: Checkouts
         uses: actions/checkout@v4
 
+      - name: Get system info for cache key
+        id: sys-info
+        run: |
+          {
+            uname -m
+            cat /proc/cpuinfo 2>/dev/null | grep 'model name' | head -1 || sysctl -n machdep.cpu.brand_string 2>/dev/null || true
+            ${FC:-gfortran} --version 2>/dev/null | head -1 || true
+            ${CC:-gcc} --version 2>/dev/null | head -1 || true
+          } | (sha256sum 2>/dev/null || shasum -a 256) | cut -c1-16 > /tmp/sys-hash
+          echo "sys-hash=$(cat /tmp/sys-hash)" >> "$GITHUB_OUTPUT"
+
       - name: Restore Build Cache
         uses: actions/cache@v4
         with:
           path: build
-          key: mfc-coverage-${{ hashFiles('CMakeLists.txt', 'toolchain/dependencies/**', 'toolchain/cmake/**', 'src/**/*.fpp', 'src/**/*.f90') }}
+          key: mfc-coverage-${{ steps.sys-info.outputs.sys-hash }}-${{ hashFiles('CMakeLists.txt', 'toolchain/dependencies/**', 'toolchain/cmake/**', 'src/**/*.fpp', 'src/**/*.f90') }}
 
       - name: Setup Ubuntu
         run: |

.github/workflows/test.yml

@@ -98,12 +98,6 @@ jobs:
       - name: Clone
         uses: actions/checkout@v4
 
-      - name: Restore Build Cache
-        uses: actions/cache@v4
-        with:
-          path: build
-          key: mfc-build-${{ matrix.os }}-${{ matrix.mpi }}-${{ matrix.debug }}-${{ matrix.precision }}-${{ matrix.intel }}-${{ hashFiles('CMakeLists.txt', 'toolchain/dependencies/**', 'toolchain/cmake/**', 'src/**/*.fpp', 'src/**/*.f90') }}
-
       - name: Setup MacOS
         if:   matrix.os == 'macos'
         run:  |
@@ -137,11 +131,29 @@ jobs:
         with:
           python-version: '3.14'
 
+      - name: Get system info for cache key
+        id: sys-info
+        run: |
+          {
+            uname -m
+            cat /proc/cpuinfo 2>/dev/null | grep 'model name' | head -1 || sysctl -n machdep.cpu.brand_string 2>/dev/null || true
+            if command -v ifx &>/dev/null; then ifx --version 2>/dev/null | head -1; else ${FC:-gfortran} --version 2>/dev/null | head -1 || true; fi
+            ${CC:-gcc} --version 2>/dev/null | head -1 || true
+          } | (sha256sum 2>/dev/null || shasum -a 256) | cut -c1-16 > /tmp/sys-hash
+          echo "sys-hash=$(cat /tmp/sys-hash)" >> "$GITHUB_OUTPUT"
+
+      - name: Restore Build Cache
+        uses: actions/cache@v4
+        with:
+          path: build
+          key: mfc-build-${{ matrix.os }}-${{ matrix.mpi }}-${{ matrix.debug }}-${{ matrix.precision }}-${{ matrix.intel }}-${{ steps.sys-info.outputs.sys-hash }}-${{ hashFiles('CMakeLists.txt', 'toolchain/dependencies/**', 'toolchain/cmake/**', 'src/**/*.fpp', 'src/**/*.f90') }}
+
       - name: Build
         run:  |
-          /bin/bash mfc.sh test -v --dry-run -j "$(nproc)" --${{ matrix.debug }} --${{ matrix.mpi }} ${{ matrix.precision != '' && format('--{0}', matrix.precision) || '' }} $TEST_ALL
+          /bin/bash mfc.sh test -v --dry-run -j "$(nproc)" --${{ matrix.debug }} --${{ matrix.mpi }} $PRECISION $TEST_ALL
         env:
           TEST_ALL: ${{ matrix.mpi == 'mpi' && '--test-all' || '' }}
+          PRECISION: ${{ matrix.precision != '' && format('--{0}', matrix.precision) || '' }}
 
       - name: Test
         run: |