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| author | Akim Demaille <akim.demaille@gmail.com> | 2021-09-10 06:48:02 +0200 |
|---|---|---|
| committer | Akim Demaille <akim.demaille@gmail.com> | 2021-09-11 08:26:10 +0200 |
| commit | 5d9ccd5a87f7991c6f52d45e2b57ad0b03e76cf7 (patch) | |
| tree | 88ac63f92f4d5d5519faf2d6321324a11aa355a1 /NEWS | |
| parent | ad9b8a069ffaba0e93504b3414be16ba06b035ff (diff) | |
| download | bison-5d9ccd5a87f7991c6f52d45e2b57ad0b03e76cf7.tar.gz | |
yacc: declare yyerror/yylex only when POSIXLY_CORRECT
The recent changes to comply with POSIX are breaking Automake's test
suite.
Reported by Kiyoshi Kanazawa.
<https://lists.gnu.org/r/bug-bison/2021-09/msg00005.html>
To limit the impact of POSIX changes, bind them to $POSIXLY_CORRECT.
Suggested by Karl Berry.
<https://lists.gnu.org/r/bug-bison/2021-09/msg00009.html>
The existing `maintainer-check-posix` Make target checks these
changes.
* src/getargs.h, src/getargs.c (set_yacc): New.
Use it.
* data/skeletons/bison.m4 (b4_posix_if): New.
* data/skeletons/yacc.c (b4_declare_yyerror_and_yylex): Use it.
* doc/bison.texi, tests/local.at: Adjust.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 10 |
1 files changed, 9 insertions, 1 deletions
@@ -2,6 +2,14 @@ GNU Bison NEWS * Noteworthy changes in release ?.? (????-??-??) [?] + The generation of prototypes for yylex and yyerror in Yacc mode is + breaking existing grammar files. To avoid breaking too many grammars, the + prototypes are now generated when `-y/--yacc` is used *and* the + `POSIXLY_CORRECT` environment variable is defined. + + Avoid using `-y`/`--yacc` simply to comply with Yacc's file name + conventions, rather, use `-o y.tab.c`. Autoconf's AC_PROG_YACC macro uses + `-y`. Avoid it if possible, for instance by using gnulib's gl_PROG_BISON. * Noteworthy changes in release 3.8 (2021-09-07) [stable] @@ -4706,7 +4714,7 @@ LocalWords: autocompletion bistromathic submessages Cayuela lexcalc hoc LocalWords: yytoken YYUNDEF YYerror basename Automake's UTF ifdef ffile LocalWords: gotos readline Imbimbo Wcounterexamples Wcex Nonunifying rcex LocalWords: Vais xsltproc YYNOMEM YYLOCATION signedness YYBISON MITRE's -LocalWords: libreadline YYMALLOC YYFREE MSVC redefinitions +LocalWords: libreadline YYMALLOC YYFREE MSVC redefinitions POSIXLY Local Variables: ispell-dictionary: "american" |