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Re: gettext and C usage

From: Bruno Haible
Subject: Re: gettext and C usage
Date: Tue, 26 Feb 2002 14:38:24 +0100 (CET)

Eli Zaretskii writes:
> > > #ifdef HAVE_LOCALE_H
> > > #include <locale.h>
> > > #endif
> > 
> > Plain "#include <locale.h>" is sufficient. Systems without <locale.h>
> > file are not in use anymore.
> If so, then using HAVE_LOCALE_H cannoot possibly hurt, can it?

With useless #ifdefs, the program still compiles, sure. But it takes
half a second more at configure time to check for <locale.h>, and it
clutters the developer's sources.

> > > # define LC_MESSAGES (-1)
> > > #endif
> > 
> > Not needed. If <locale.h> doesn't define LC_MESSAGES, <libintl.h> will
> > do so. <libintl.h> is included by "gettext.h".
> But if ENABLE_NLS is not defined, then lib/gettext.h does not include
> libintl.h, at least the version of lib/gettext.h that is in
> texinfo-4.0i.tar.gz.  So LC_MESSAGES will remain undefined.

You are right. OTOH, testing for !HAVE_LC_MESSAGES is wrong also,
because when ENABLE_NLS is defined (on platforms without LC_MESSAGES
in <locale.h>), then <libintl.h> will define its own LC_MESSAGES, and
you'd better use the same one. So this becomes

# define LC_MESSAGES (-1)


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