Akim Demaille b5515215c1 yacc.c: don't define _Noreturn uselessly ...

Clang warns:

     aux/x.h:97:11: error: macro name is a reserved identifier
           [-Werror,-Wreserved-id-macro]
     #  define _Noreturn YY_ATTRIBUTE ((__noreturn__))

Reported by Derek Clegg.
http://lists.gnu.org/archive/html/bug-bison/2018-10/msg00024.html

* data/c.m4 (b4_attribute_define): Don't define _Noreturn unconditionally.
* data/glr.c: Ask for _Noreturn.

2018-10-23 09:08:57 +02:00

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