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Date:	Fri, 10 Oct 2014 14:13:01 +0200
Message-ID:	<CAMCbSMpWKbSVhVu85_02fN3sgWXiFBkUzjOOAJ6+Jxot8X6E=Q@mail.gmail.com>
Subject:	Re: Cannot exec() program outside of /bin if PATH is unset
From:	Arjen Markus <arjen DOT markus895 AT gmail DOT com>
To:	Andrey Repin <cygwin AT cygwin DOT com>
X-IsSubscribed:	yes

Right, that makes sense. There is indeed no way for the package
manager to handle that scenario without external help, such as a PATH
variable that includes the various directories these extra DLLs reside
in.

Regards,

Arjen



2014-10-10 13:22 GMT+02:00  <tednolan AT bellsouth DOT net>:
> In message <CAMCbSMrar1Zu4p6gN=gc8-XqE-8RUTmP3er0ujeN--CHKzCNAQ AT mail DOT gmail DOT com>
> you write:
>>This might the way the pkgIndex.tcl file for this particular extension
>>has been implemented, but like Jan says, that is not the Tcl way.
>>
>>Here is a sample that illustrates the more acceptable procedure:
>>
>># Tcl package index file, version 1.0
>>
>>if {![package vsatisfies [package provide Tcl] 8.6]} {return}
>>
>>package ifneeded itcl 4.0b7 [list load [file join $dir "itcl40b7.dll"] itcl]
>>package ifneeded Itcl 4.0b7 [list load [file join $dir "itcl40b7.dll"] itcl]
>>
>>The variable "dir" is set by the package management subsystem and the
>>effect is that the _full_ path is constructed before the DLL is
>>actually loaded.
>>
>>Regards,
>>
>>Arjen
>>
>>2014-10-10 13:24 GMT+02:00 Jan Nijtmans <jan DOT nijtmans AT gmail DOT com>:
>>> 2014-10-10 12:34 GMT+02:00 Corinna Vinschen <corinna-cygwin AT cygwin DOT com>:
>>>> On Oct  9 11:46, tednolan AT bellsouth DOT net wrote:
>>>>> I'm pretty sure I've got some programs loading Tcl extensions that
>>>>> cd into the directory with the extension dlls, load the extension and then
>>>>> change back to where ever they were.
>>>>
>>>> Hmm.  If so, it's quite a weird way to handle this, rather than
>>>> loading the modules with full path.
>>>>
>>>> Is that a Tcl "feature", or is it how certain Tcl apps are implemented?
>>>> I can't really believe the former...
>>>
>>> This is certainly not a Tcl "feature"!  The standard Tcl extension
>>> mechanism always uses the full path simply because Tcl
>>> cannot depend on platform-specific ways to search for
>>> such libraries elsewhere.
>>>
>>> I'm willing to test this;I don't believe such a change
>>> will break anything in my Tcl environment.
>>>
>>> Regards,
>>>        Jan Nijtmans
>
> Hmm,
>
> It's been a while, but I think it is something like the extension is
> a DLL, but it depends on another DLL.  Consider for instance, mysqltcl.
> If you want to deploy that, you need the mysqltcl.dll and the mysql dll,
> so you either have to be in the same dir when you load the extension,
> or put that dir in PATH.
>
> Unfortunately, I can't run a test release on my work machine, or take
> my work progs home.
>
> --
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