locale: Make locale_t available when possible.

[pspp] / ChangeLog

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+2009-11-22  Bruno Haible  <bruno@clisp.org>
+
+       locale: Make locale_t available when possible.
+       * lib/locale.in.h: Include <xlocale.h> when it exists.
+       * m4/locale_h.m4 (gl_LOCALE_H): Check for <xlocale.h> and arrange to
+       replace <locale.h> if it does not define locale_t but <xlocale.h> does.
+       * modules/locale (Depends-on): Add extensions.
+       (Makefile.am): Also substitute HAVE_XLOCALE_H.
+       * doc/posix-headers/locale.texi: Document the problem with locale_t.
+
 2009-11-22  Bruno Haible  <bruno@clisp.org>
 
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