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Message-ID:	<42CDF227.1090007@byu.net>
Date:	Thu, 07 Jul 2005 21:25:27 -0600
From:	Eric Blake <ebb9 AT byu DOT net>
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To:	cygwin AT cygwin DOT com
CC:	Angelo Graziosi <Angelo DOT Graziosi AT roma1 DOT infn DOT it>
Subject:	Re: Problems with ash-20040127-3 (Attn: bash maintainer)
References:	<Pine DOT OSF DOT 4 DOT 21 DOT 0507080133340 DOT 15260-200000 AT ax0rm1 DOT roma1 DOT infn DOT it> <Pine DOT GSO DOT 4 DOT 61 DOT 0507072020520 DOT 29317 AT slinky DOT cs DOT nyu DOT edu>
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According to Igor Pechtchanski on 7/7/2005 6:34 PM:
> Yep.  The new /bin/sh is bash.  Apparently, bash doesn't like the
> following line:
> 
> if [ "`echo $dllname | sed 's{^lib/.*\.dll${{'`" != "$dllname" ]; then
> 
> because in bash, ${ has special meaning -- it starts a variable reference.
> FWIW, I get the same error with "bash -n wingcc_ld.sh" when bash is
> version 2.05b.  I suspect this may actually be a bug in bash, since single
> quotes ought to stop it from trying to expand variable references.  This
> only happens when the single quotes are inside a shell substitution (i.e.,
> "echo '${'" works, but "echo `echo '${'`" doesn't).  Nevertheless,
> changing the '{' to any other character (e.g., '#') in the sed script
> makes it parse correctly.

Another workaround is to use the alternative command substitution syntax
(which also has the nice property of being easier to read and nest):

if [ "$(echo $dllname | sed 's{^lib/.*\.dll${{')" != "$dllname" ]; then

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
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