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Re: host_os has a space in it

From: Ralf Wildenhues
Subject: Re: host_os has a space in it
Date: Wed, 3 May 2006 09:52:32 +0200
User-agent: Mutt/1.5.11

* Seanster wrote on Tue, May 02, 2006 at 11:45:47AM CEST:
> On Tue, 2 May 2006 09:56:24 +0200, you wrote:
> >Which shell are you using?  Are you using libltdl?
> GNU bash, version 2.04.21(1)-release (i386-redhat-linux-gnu)

Confirmed.  The bug is with this bash release.  I downloaded and compiled (presumably close enough
to the RedHat-modified version you used), it has the bug that

  ./bash -c 'set a b; sIFS=$IFS; IFS=-; h=$*; IFS=$sIFS; echo "$h"'

outputs 'a b' rather than 'a-b'.  This bug has been fixed in

OK to apply this documentation update?


        * doc/autoconf.texi (Special Shell Variables) <IFS>: Document
        `$*' and IFS concatenation issue with traditional shells and
        bash-2.04.  Report by address@hidden

Index: doc/autoconf.texi
RCS file: /cvsroot/autoconf/autoconf/doc/autoconf.texi,v
retrieving revision 1.1012
diff -u -r1.1012 autoconf.texi
--- doc/autoconf.texi   3 May 2006 01:08:27 -0000       1.1012
+++ doc/autoconf.texi   3 May 2006 06:10:02 -0000
@@ -11546,7 +11696,9 @@
 The proper value for @code{IFS} (in regular code, not when performing
 splits) is @address@hidden@address@hidden  The first character is
-especially important, as it is used to join the arguments in @samp{@@*}.
+especially important, as it is used to join the arguments in @samp{$*};
+however, note that traditional shells, but also bash-2.04, fail to adhere
+to this and join with a space anyway.
 @item LANG
 @itemx LC_ALL

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