Hi Patrick,
Good catch! I'm CCing the autoconf list, as this is probably a candidate for
AS_SHELL_SANITIZE, and the comparative shellology documentation...
Patrick Welche wrote:
> On Tue, Jul 27, 2004 at 04:07:14PM +0100, Patrick Welche wrote:
>
>>The great part is this is a ksh quoting problem:
>>Oh joy... (ksh version @(#)PD KSH v5.2.14 99/07/13.2)
>
>
> .. and it is explained in TFM:
>
> The following is a list of things that are affected by the state of the
> posix option:
> o \" inside double quoted `..` command substitutions: in posix
> mode, the \" is interpreted when the command is interpreted; in
> non-posix mode, the backslash is stripped before the command
> substitution is interpreted. For example, echo "`echo \"hi\"`"
> produces `"hi"' in posix mode, `hi' in non-posix mode. To avoid
> problems, use the $(...) form of command substitution.
>
> So what now for the libtool point of view?
At least until AS_SHELL_SANITIZE handles this, libtool needs to find a workaround.
> - I still wonder why ksh is chosen over sh on my NetBSD system.
ksh has function support for one thing, and maybe $LINENO support.
> - Should we "use the $(...) form of command substitution" "To avoid problems"?
We can't use $(...) indiscriminately, as plenty of ancient bourne compatible
shells will choke on it :-(
> Reminder of the miscreant line:
>
> output_verbose_link_cmd="`$echo \"X$output_verbose_link_cmd\" | $Xsed -e \"$no_glob_subst\"`"
>
> (setting set +o posix in configure for the benefit of ksh fixes things too.)
Does ksh have a way to detect itself programatically so that libtool can add
something of the form:
test -z "$KSH_VERSION" || set +o posix
Cheers,
Gary.
--
Gary V. Vaughan ())_. gary@{lilith.warpmail.net,gnu.org}
Research Scientist ( '/ http://tkd.kicks-ass.net
GNU Hacker / )= http://www.gnu.org/software/libtool
Technical Author `(_~)_ http://sources.redhat.com/autobook
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