Add ubsan run(s) to CI

.github/workflows/gamma_f77.yml

@@ -69,6 +69,35 @@ jobs:
           setarch `uname -m` -R ./gamma.exe | grep '0.296439082102472192334520537379648E+06'
           setarch `uname -m` -R ./gamma.exe | grep '0.554521067573633755529159865936434E-01'
           setarch `uname -m` -R ./gamma.exe | grep '0.265252859812191058636308480000000E+33'
+  ubuntu-native-ubsan:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      fail-fast: false
+      matrix:
+        standard: [ legacy, f2018 ]
+        compiler: [ g++ ]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: '0'
+      - name: ubuntu-native
+        run: |
+          ${{ matrix.compiler }} -x f77 -std=${{ matrix.standard }} -m64 -fno-exceptions -fsanitize=shift -fsanitize=shift-exponent -fsanitize=shift-base -fsanitize=integer-divide-by-zero -fsanitize=null -fsanitize=signed-integer-overflow -fsanitize=bounds -fsanitize=alignment -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow -fsanitize=enum -O1 gamma.f -lgfortran -lquadmath -o gamma.exe
+          ls -la gamma.exe
+          ./gamma.exe | grep '0.947395504039301942134227647281424E+00'
+          ./gamma.exe | grep '0.110784755653406415338349971053114E+01'
+          ./gamma.exe | grep '0.271139823924390323650711692085896E+01'
+          ./gamma.exe | grep '0.102754040920152050479188001843206E+02'
+          ./gamma.exe | grep '0.531934282525008207389522379291889E+02'
+          ./gamma.exe | grep '0.350998609824200588801455504140098E+03'
+          ./gamma.exe | grep '0.282509453680418713613816084109635E+04'
+          ./gamma.exe | grep '0.269036719467497675679082571845063E+05'
+          ./gamma.exe | grep '0.296439082102472192334520537379648E+06'
+          ./gamma.exe | grep '0.554521067573633755529159865936434E-01'
+          ./gamma.exe | grep '0.265252859812191058636308480000000E+33'
   macos-native:
     runs-on: macos-latest
     defaults: