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* c-decl.c (grokdeclarator): Give zero-length arrays size zero.
Remove dead code.
* c-typeck.c (push_init_level): Move checks for flexible array
members and zero length arrays ...
(pop_init_level): ... here. Silently discard empty initializations.
Remove dead code.
* varasm.c (output_constructor): Update for sizeof change to
zero-length arrays.
* extend.texi (Zero Length): Clarify semantics.
* gcc.dg/940510-1.c: Update expected error wording.
* gcc.dg/array-2.c, gcc.dg/array-3.c, gcc.dg/array-4.c: New.
From-SVN: r38678
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