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errors: change output, and improve -y coherence

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The prefix of warnings treated as errors is now "error: ". Also, their
suffix now reflects the changes in the Werror option format.

An output for -Werror=other used to be:
  bison: warnings being treated as errors
  input.y:1.1: warning: stray ',' treated as white space [-Wother]

It is now:
  bison: warnings being treated as errors
  input.y:1.1: error: stray ',' treated as white space [-Werror=other]

The line "warnings being treated as errors" no longer adds any info,
it will be removed in a forthcoming change.

* NEWS: Add entry "Enhancement of the -Werror"
* doc/bison.texi: Move the warnings-as-error to a new bullet.
* src/complain.c (complains): Refactor, change the prefix of warnings
that are treated as errors.
(warnings_print_categories): Support for [-Werror=CATEGORY] display
* src/getargc.c (getargs): -y implies -Werror=yacc
* tests/input.at: Update expected --yacc output for coherence.

Signed-off-by: Akim Demaille <akim@lrde.epita.fr>
This commit is contained in:
Akim Demaille
2012-09-27 12:19:09 +02:00
parent 9503b0a4a8
commit 1048a1c901
6 changed files with 100 additions and 41 deletions
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23
doc/bison.texi
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@@ -9263,12 +9263,33 @@ All the warnings.
@item none
Turn off all the warnings.
@item error
Treat warnings as errors.
See @option{-Werror}, below.
@end table
A category can be turned off by prefixing its name with @samp{no-}. For
instance, @option{-Wno-yacc} will hide the warnings about
POSIX Yacc incompatibilities.
@item -Werror[=@var{category}]
@itemx -Wno-error[=@var{category}]
Enable warnings falling in @var{category}, and treat them as errors. If no
@var{category} is given, it defaults to making all enabled warnings into errors.
@var{category} is the same as for @option{--warnings}, with the exception that
it may not be prefixed with @samp{no-} (see above).
Prefixed with @samp{no}, it deactivates the error treatment for this
@var{category}. However, the warning itself won't be disabled, or enabled, by
this option.
Note that the precedence of the @samp{=} and @samp{,} operators is such that
the following commands are @emph{not} equivalent, as the first will not treat
S/R conflicts as errors.
@example
$ bison -Werror=yacc,conflicts-sr input.y
$ bison -Werror=yacc,error=conflicts-sr input.y
@end example
@end table
@noindent