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Re: Bug in grep -P --color [bug-grep]

From: Claudio Fontana
Subject: Re: Bug in grep -P --color [bug-grep]
Date: Sat, 23 Apr 2005 13:57:37 +0200 (CEST)


--- Charles Levert <address@hidden> wrote:
> * On Saturday 2005-04-23 at 01:40:00 +0200, Claudio
> Fontana wrote:
> > In the meantime, try this one, it's better (I
> hope).
>     /* note: PCRE must be configured to work under
> UTF-8 */
> Would it be appropriate to detect this at
> configure time from the installed PCRE,

Maybe, but I don't think it's important.
If grep happens to run under UTF-8 and only a libpcre
without utf8 support is available, the call to
exec_compile fails with a nice "this version of PCRE
is not compiled with PCRE_UTF8 support" message.

If user encounters this error, he can export LANG=C,
or rebuild libpcre with --enable-utf8 without
recompiling grep.

> and if
> so to define something like HAVE_LIBPCRE_UTF8
> then (or to have configure abort with an error
> message about this being absolutely needed)?

If I really put in a test program and run it with
something like AC_RUN_IFELSE, I would only issue a
warning, since grep itself is perfectly functional.

Putting in a HAVE_LIBPCRE_UTF8 would capture the
situation at configure time, and nullify attempts by
the user to rebuild pcre and get grep -P to
automagically work.

opening patch 3934 on Savannah (more changes):


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