nvc currently miscompiles this, hopefully fixed in release 23.09

kernel/x86_64/casum_microk_skylakex-2.c

@@ -2,7 +2,9 @@
 #ifdef __NVCOMPILER
 #define NVCOMPVERS ( __NVCOMPILER_MAJOR__ * 100 + __NVCOMPILER_MINOR__ )
 #endif
-#if (( defined(__GNUC__)  && __GNUC__   > 6 && defined(__AVX512CD__)) || (defined(__clang__) && __clang_major__ >= 9)) || ( defined(__NVCOMPILER) && NVCOMPVERS >= 2203 )
+#if (( defined(__GNUC__)  && __GNUC__   > 6 && defined(__AVX512CD__)) || (defined(__clang__) && __clang_major__ >= 9)) || ( defined(__NVCOMPILER) && NVCOMPVERS >= 2309 )
+
+#if (!(defined(__NVCOMPILER) && NVCOMPVERS < 2309))
 
 #define HAVE_CASUM_KERNEL 1
 
@@ -350,3 +352,4 @@ static FLOAT casum_kernel(BLASLONG n, FLOAT *x)
     return sumf;
 }
 #endif
+#endif