------- Comment #2 from burnus at gcc dot gnu dot org 2007-07-28 14:00 ------- R532 data-stmt-constant is scalar-constant or scalar-constant-subobject or signed-int-literal-constant or signed-real-literal-constant or null-init or structure-constructor
I think this also allows for substrings. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32928