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Specific problems on some machines:
+ * AArch64 (GCC 11.1 and 11.2)
+
+ Because of the bug in GCC (fixed in 11.3), with the option
+ -O3, vectorization results wrong code for the function
+ buf_eq_const. Please use -O2 or -fno-tree-loop-vectorize.
+
* IBM RS/6000 running AIX
Due to a change in gcc (since version 2.8) the MPI stuff may