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headers: move CPP guards into YY_*_INCLUDED to avoid collisions

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See <http://lists.gnu.org/archive/html/bug-bison/2012-09/msg00016.html>.

* data/c.m4 (b4_cpp_guard): Prepend YY_ and append _INCLUDED.
* tests/headers.at: Adjust.
* NEWS, doc/bison.texi: Document.
This commit is contained in:
Akim Demaille
2012-09-27 09:43:49 +02:00
parent 3746fc33c4
commit 6192d2c6de
4 changed files with 33 additions and 4 deletions
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7
tests/headers.at
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@@ -167,13 +167,14 @@ AT_BISON_CHECK([-d -o AT_SKEL_CC_IF([$1.cc $1.yy], [$1.c $1.y])])
AT_SKEL_CC_IF([],
[AT_CHECK([$EGREP yy $1.h], [1])])
# Ignore comments. Ignore YYPARSE_PARAM (obsolete) and
# YYPUSH_MORE(_DEFINED)? (whose definition is constant).
# Check there is not 'YY' left.
# Ignore comments, YYPARSE_PARAM (obsolete), YYPUSH_MORE(_DEFINED)?
# (constant definition), YY_\w+_INCLUDED (header guards).
#
# YYDEBUG (not renamed) can be read, but not changed.
AT_CHECK([[sed -ne 's,/\*[^*]*\*/,,g;s,//.*,,' \
-e '/YY/p' ]$1.AT_SKEL_CC_IF([hh], [h])[ |
$EGREP -wv 'YY(PARSE_PARAM|PUSH_MORE(_DEFINED)?)|(defined|if) YYDEBUG']],
$EGREP -wv 'YY(PARSE_PARAM|PUSH_MORE(_DEFINED)?|_[0-9A-Z_]+_INCLUDED)|(defined|if) YYDEBUG']],
[1])
AT_LANG_COMPILE([$1.o])