[uClibc]locale support in uClibc 0.9.12

[Manuel Novoa III]

Hello,

On Sun, Jul 14, 2002 at 09:38:01PM -0700, David Meggy wrote:
> Hi, I'm having troubles getting the locale support to work in the latest
> uClibc version.

Not surprising as it is mainly a proof-of-concept at the moment.  Even
ignoring the fact that collation support is missing, it is not in a
finished form.  My main goal was to get an idea of how much space was
needed to support the standard (ANSI/SUSv3) locale functionality.
Secondarily, I needed enough locale support to start implementation of
the wchar.h functions.  The eventual goal is to generate a shared
mmap-able locale data file to better support no-MMU systems.

>                  The first problem I solved myself and the patch is
> below.  The patch is needed for cross compiling.  

I'm afraid it isn't that easy.  If it were, there wouldn't be the error
message.  ;-)

There are potential issues with padding and alignment of data in the
structure.  This is one of the problems I need to address.  While your
patch may work for you, it may not either.  It may be necessary for you
to build gen_mmap for your target arch, run it there, and copy the
generated file back to your development system to continue the build.

>                                                   The second problem is
> with extra/locale/gen_wc8bit.c.  The following is a snippet from the
> main function.  This fails on my system.
> 
> 
>         if (!setlocale(LC_CTYPE, "en_US.UTF-8")) {
>                 printf("setlocale(LC_CTYPE,\"en_US.UTF-8\") failed!\n");
>                 return EXIT_FAILURE;
> 
> 
> If I comment it out, I only run into more problems later.  How can I get
> around this problem?

The easiest way is to just generate the en_US.UTF-8 locale for glibc.
However, just about any other UTF-8 locale for glibc (>= 2.2) will suffice.
This is only used for generation of the isw*() and tow*() data for the
wctype.h functions.  Note though that the turkish locale has a couple of
different towupper/towlower mappings than all other glibc locales.

Manuel