The Tcl sample extension implements an extension calculatint the Core Secure Hash Algorithm (sha1).  It demonstrates a [TEA]-conformant [Tcl] [extension] that includes a [C] library that can be dynamically [load]ed.  It also illustrates the TEA directory structure and use of Tcl autoconf extensions to to provide '''configure''' and '''make''' facilities.

   * Location
   ** current
   *** http://core.tcl.tk/sampleextension/
   ** previous
   *** http://tcl.cvs.sourceforge.net/tcl/sampleextension/
   ** nightly snaphots, `sample-YYYYMMDD.tar.gz`
   *** ftp://ftp.tcl.tk/pub/tcl/nightly-cvs/
   *** http://ftp.cs.pu.edu.tw/Unix/lang/tcl/nightly-cvs/?C=S;O=A
   *** http://ftp2.uk.freebsd.org/sites/ftp.tcl.tk/pub/tcl/nightly-cvs/
   ** very old versions
   *** ftp://www.tcl.tk/pub/tcl/examples/tea/ 

   * related topics
   ** [tclconfig]
   ** [how to use C functions from Tcl].
   ** [TEA]
   ** [TEA2]


***Quick start guide***

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# Replace quux with the name of your extension
wget -qO- http://core.tcl.tk/sampleextension/tarball/quux.tar.gz | tar xzv
cd quux
wget -qO- http://core.tcl.tk/tclconfig/tarball/tclconfig.tar.gz | tar xzv
# Write your source files
# Edit configure.in
autoconf
# And then the usual:
./configure
make
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<<categories>> Package | Porting | Foreign Interfaces | Cryptography