On Fri, 22 Jul 2016, Marek Polacek wrote:

> gcc/go/
>       * go-system.h (go_fallthrough): Define.
>       * gofrontend/escape.cc (Escape_analysis_assign::assign): Add
>       go_fallthrough.
>       * gofrontend/expressions.cc (Binary_expression::do_get_backend):
>       Likewise.

gofrontend is externally maintained and should not be modified locally.

> libgcc/
>       * soft-fp/op-common.h: Add _FP_FALLTHRU.
>       * soft-fp/soft-fp.h (_FP_FALLTHRU): Define.

Likewise soft-fp (and I think a comment would be better than anything 
needing version conditionals).

-- 
Joseph S. Myers
jos...@codesourcery.com

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