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Re: bash-4.2(42) on AIX 6.1 has broken command expansion in double-quote


From: Chet Ramey
Subject: Re: bash-4.2(42) on AIX 6.1 has broken command expansion in double-quoted strings
Date: Wed, 27 Feb 2013 15:30:18 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130216 Thunderbird/17.0.3

On 2/27/13 1:26 PM, Jason Vas Dias wrote:
> Hi bash gurus - bash appears to be broken on AIX 6.1 - I'd really
> appreciate some advice :
> 
> With bash-4.2 patchlevel 42 (the latest available as of today from
> ftp.gnu.org ),
> on AIX,  the resultant bash built with gcc-4.7.2 and system ld + as,
> ends up being
> broken wrt to command output in strings:
> $ ./bash
> bash-4.2$ echo "$(echo hello)"
> bash: command substitution: line 2: syntax error near unexpected token `)'
> bash: command substitution: line 2: `echo hello)"'
> bash-4.2$ v="$(date)"
> bash: command substitution: line 13: syntax error near unexpected token `)'
> bash: command substitution: line 13: `date)"'

I can't reproduce this, but ISTR something similar when the parser was
built with byacc.  I think a sufficiently modern version of bison should
work.  Make sure you delete builtins/evalstring.o and
builtins/libbuiltins.a after rebuilding y.tab.[ch].  The dependency there
is tricky, and it's best just to do it explicitly.

Chet
-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/



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