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Editorial Team
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Asked: 2026-05-22T16:18:32+00:00

I’m trying to run gpsfeed+ to test an app I’m writing, and when running

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I’m trying to run gpsfeed+ to test an app I’m writing, and when running gpsfeed+.tcl, I get a

Error in startup script: can't find package udp
    while executing
"package req udp"
    (file "gpsfeed+.tcl" line 738)

There seem to be no instructions/help available for downloading and installing the udp package..
Does anyone have a straight-forward method for adding this package to tcl?

(I’m on osx 10.6.7, and have tcl8.5 installed in /opt/local/lib/tcl8.5/)

Thanks

EDIT: Solution (Thanks, Donal)

  1. I downloaded ActiveTcl, and installed it (Double-click).
  2. ActiveTcl installs teacup, which should be updated: sudo teacup update-self

  3. sudo teacup install udp found and installed the udp package

    Resolving udp … [package udp 1.0.9 macosx10.5-i386-x86_64 @ http://teapot.activestate.com]
    Resolving Tcl 8.4 -is package … [package Tcl 8.5.9 _ … Installed outside repository, probing dependencies]
    Retrieving package udp 1.0.9 macosx10.5-i386-x86_64 …@ http://teapot.activestate.com … Ok
    Installing into /Library/Tcl/teapot
    Installing package udp 1.0.9 macosx10.5-i386-x86_64

  4. Now, either changing the path for the ActiveTcl tclsh version, or running it explicitly
    /usr/local/bin/tclsh8.5 gpsfeed+.tcl works, and the udp library is found.

Now, all I need is someone to rewrite it to be legible! 😉
gpsfeed+ configuration options

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1 Answer

  1. Editorial Team

    I use ActiveTcl on OSX. While I can’t remember if the udp package is part of the default download or if you have to use teacup update to pull it in after installation, I know that ActiveState most certainly distribute the package for use with their distribution.

    If you’re building directly, the TclUDP Wiki page points to where to get the source code from as well as how to use it (if you need that). The directory where you install the package needs to be on the list of places in the auto_path global variable. Either pick the installation location from a place already listed on that path in your installation of Tcl, or lappend the location where you put TclUDP at the start of the script. The gpsfeed+ code might have some code to allow you to specify package installation locations without editing its code, but I don’t know it so I can’t say for sure without quite a bit more research.

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