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Re: wchar.h

From: Eric Blake
Subject: Re: wchar.h
Date: Sun, 25 Feb 2007 15:41:32 -0700
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20061207 Thunderbird/ Mnenhy/

Hash: SHA1

According to Bruce Korb on 2/25/2007 10:45 AM:
> I would sure hope that fixing this winds up as easy as adding
> "wchar-h.m4" module and in my code:
>   #include "config.h"
>   #include WCHAR_H_FILE

In fact, it is a matter of using the 'wchar' module, and in your code,

#include "config.h"
#include <wchar.h>

because gnulib makes sure that a replacement wchar.h, if needed, is found
prior to the buggy system wchar.h.

> and, perhaps, on whichever OS/X it is that needs the "runetype.h"

> The bottom line is that there really is some flavor of OS/X that
> has this pre-include of "runetype.h" requirement out there somewhere.

Is this patch okay to apply so that the existing wchar module does just
that?  However, before I apply it, I would like to ascertain exactly which
version has this bug, so we can better document it.

2007-02-25  Eric Blake  <address@hidden>

        * m4/wchar.m4 (gl_WCHAR_H): Check for runetype.h.
        * lib/wchar_.h [HAVE_RUNETYPE_H]: Include it when needed for Mac

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

Eric Blake             address@hidden
Version: GnuPG v1.4.5 (Cygwin)
Comment: Public key at home.comcast.net/~ericblake/eblake.gpg
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

Index: m4/wchar.m4
RCS file: /sources/gnulib/gnulib/m4/wchar.m4,v
retrieving revision 1.1
diff -u -p -r1.1 wchar.m4
--- m4/wchar.m4 13 Jan 2007 05:23:37 -0000      1.1
+++ m4/wchar.m4 25 Feb 2007 22:38:25 -0000
@@ -10,7 +10,7 @@ dnl Written by Eric Blake.
 # wchar.m4 serial 1
+[ AC_CHECK_HEADERS_ONCE([runetype.h])
   AC_CACHE_CHECK([whether <wchar.h> is standalone],
     [AC_COMPILE_IFELSE([[#include <wchar.h>
Index: lib/wchar_.h
RCS file: /sources/gnulib/gnulib/lib/wchar_.h,v
retrieving revision 1.1
diff -u -p -r1.1 wchar_.h
--- lib/wchar_.h        13 Jan 2007 05:23:37 -0000      1.1
+++ lib/wchar_.h        25 Feb 2007 22:38:25 -0000
@@ -36,6 +36,12 @@
 #include <stdio.h>
 #include <time.h>
+/* Some versions of Mac OS/X have a bug: <runetype.h> must be included
+   before <wchar.h>.  */
+# include <runetype.h>
 /* Include the original <wchar.h>.  */
 #include @ABSOLUTE_WCHAR_H@

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