error installing cogito

[Anders F Björklund]

Ryan Schmidt wrote:

>> We can't use 'array unset env' as that is documented to disconnect  
>> Tcl from the environment, and some messing around hasn't shown a  
>> clean way to work around this.  Maybe a Tcl expert is needed, and  
>> determining if this is Mac-specific or 8.4.7; of course, either  
>> way, we have to deal with it.
>>
>> FYI, this is done in portutil.tcl (base/src/port1.0/) in proc  
>> command_exec.
>
> Thanks for the analysis! I added a link to your explanation to  
> http://trac.macports.org/wiki/LeopardProblems
>
> Do we really not have a macports base ticket for this issue yet? I  
> couldn't find one but maybe I'm searching wrong. We need one so  
> that we can mark all the other port bugs that are cropping up as  
> duplicates of it.

As far as I can tell, Apple explicitly enables the use of "putenv" to  
clear out environment variables in Leopard's tcl-64 variant (#define  
USE_PUTENV 1). Whereas the original tcl 8.4.7 (and Tiger's tcl-20.1.4  
too) only uses that on Windows, as far as I can tell. And sets the  
var to NULL otherwise. Still doesn't explain why doing a "port clean"  
and restarting fixes it, but it's a difference between the two  
Tcl-8.4.7's ?

--anders