Akim Demaille 3cc83855d9 skeletons: update the handling of compiler attributes ...

* data/c.m4 (b4_attribute_define): Instead of defining __attribute__,
define YY_ATTRIBUTE conditionally.
(YY_ATTRIBUTE_PURE, YY_ATTRIBUTE_UNUSED, _Noreturn): New.
Use them.
* data/glr.c: Use them.

2013-11-05 10:44:03 +01:00

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