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m4: allow the definition of side-effect only macros

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* data/bison.m4 (b4_divert_kill, b4_define_silent): New.
* data/c.m4: Comment change.
This commit is contained in:
Akim Demaille
2013-04-08 20:37:09 +02:00
parent 6155db81aa
commit dde95ca432
2 changed files with 15 additions and 1 deletions
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data/c.m4
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@@ -549,7 +549,7 @@ b4_pure_if([], [[extern ]b4_api_PREFIX[STYPE ]b4_prefix[lval;
# b4_YYDEBUG_define
# ------------------
# -----------------
m4_define([b4_YYDEBUG_define],
[[/* Debug traces. */
]m4_if(b4_api_prefix, [yy],