fix: icc < 22.0.1 advertises but doesn't support the fallthrough attr…

…ibute

.github/workflows/ci.yml

@@ -56,20 +56,20 @@ jobs:
       fail-fast: false
       matrix:
         version:
-        - "2021.1.1"
-        - "2021.1.2"
-        - "2021.2.0"
-        - "2021.3.0"
+        # - "2021.1.1"
+        # - "2021.1.2"
+        # - "2021.2.0"
+        # - "2021.3.0"
         - "2021.4.0"
         - "2022.0.1"
-        - "2022.0.2"
-        - "2022.1.0"
-        - "2022.2.0"
-        - "2022.2.1"
-        - "2023.0.0"
-        - "2023.1.0"
-        - "2023.2.0"
-        - "2023.2.1"
+        # - "2022.0.2"
+        # - "2022.1.0"
+        # - "2022.2.0"
+        # - "2022.2.1"
+        # - "2023.0.0"
+        # - "2023.1.0"
+        # - "2023.2.0"
+        # - "2023.2.1"
     steps:
       - uses: actions/checkout@v4
       - name: Free some disk space
@@ -95,7 +95,7 @@ jobs:
         working-directory: test
         run: |
           . /opt/intel/oneapi/setvars.sh
-          make likely
+          make
 
   # nvhpc:
   #   runs-on: ubuntu-latest

hedley.h

@@ -1727,11 +1727,18 @@ HEDLEY_DIAGNOSTIC_POP
 # undef HEDLEY_FALL_THROUGH
 #endif
 #if \
-  HEDLEY_HAS_ATTRIBUTE(fallthrough) || \
+  ( \
+    HEDLEY_HAS_ATTRIBUTE(fallthrough) && \
+    (!defined(HEDLEY_INTEL_VERSION) || HEDLEY_INTEL_VERSION_CHECK(20,22,0)) \
+  ) || \
   HEDLEY_GCC_VERSION_CHECK(7,0,0) || \
   HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
 #  define HEDLEY_FALL_THROUGH __attribute__((__fallthrough__))
-#elif HEDLEY_HAS_CPP_ATTRIBUTE_NS(clang,fallthrough)
+#elif \
+  ( \
+    HEDLEY_HAS_CPP_ATTRIBUTE_NS(clang,fallthrough) && \
+    (!defined(HEDLEY_INTEL_VERSION) || HEDLEY_INTEL_VERSION_CHECK(20,22,0)) \
+  )
 #  define HEDLEY_FALL_THROUGH HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[clang::fallthrough]])
 #elif HEDLEY_HAS_CPP_ATTRIBUTE(fallthrough)
 #  define HEDLEY_FALL_THROUGH HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[fallthrough]])