tcl 101

[Marin Saric]

Long story short, you probably want something like

"./findhost.sh \$(exec ${topdir}/config.guess)"

where the second "$" character is not escaped so that tcl can replace
topdir with the right directory name.
  Marin

On Thu, Dec 22, 2011 at 2:48 AM, Marin Saric <marin.saric at gmail.com> wrote:
> I think you need to escape the "$" character to "\$" inside the
> command or use the curly braces '{' and '}' instead of double quotes.
> When using quotes, tcl catches the $ sign and thinks that what follows
> is a variable. This is a language feature known as "interpolation".
>
> It then attempts to find the variable called  "(exec
> ${topdir}/config.guess)" . Such a variable doesn't exist, hence the
> reported error.
>
> This page sums up Tcl quoting rules quite well:
> http://wiki.tcl.tk/1726
>
>  Marin
>
> On Thu, Dec 22, 2011 at 2:22 AM, Mark Brethen <mark.brethen at gmail.com> wrote:
>> This line in my portfile:
>>
>>    set builddir    [system -W ${topdir}/scripts "./findhost.sh $(exec ${topdir}/config.guess)"]
>>
>> is giving an error
>>
>> :error:activate Target org.macports.activate returned: can't read "(exec /opt/local/libexec/reduce-algebra/config.guess)": no such variable
>>
>> I'm trying to pass the result of config.guess to another shell script findhost. Could someone point out the error?
>>
>> Mark
>>
>>
>>
>>
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