Re: mbstate_t on HP-UX 11.11

[Eric Blake]

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According to Bruno Haible on 12/20/2008 5:43 AM:
> On HP-UX 11.11, mbstate_t is not defined by <wchar.h> unless _XOPEN_SOURCE is
> set to 500. (Even when _HPUX_SOURCE is set!)

What happens if _XOPEN_SOURCE is set to something larger than 500,
implying a newer standards version?

> 
> I have submitted a patch so that autoconf sets this flag by default. But there
> are so many INSTALL files which only recommend CC="cc -Ae", that IMO this
> needs to be handled by the gnulib 'extensions' module as well.

>       Ensure mbstate_t is defined on HP-UX 11.11.
>       * m4/extensions.m4 (AC_USE_SYSTEM_EXTENSIONS): Require
>       AC_CANONICAL_HOST. On HP-UX, define _XOPEN_SOURCE to 500.

This begs the question - should autoconf's AC_USE_SYSTEM_EXTENSIONS also
be doing this, rather than just relying on _AC_PROG_CC_C89?  Also, your
proposed patch only touched the C89 tests; what about C99?

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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