| 1 | <sect1 id="ch05-tcl" xreflabel="Tcl">
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| 2 | <title>Installing Tcl-&tcl-version;</title>
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| 3 | <?dbhtml filename="tcl.html" dir="chapter05"?>
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| 4 |
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| 5 | <para>The Tcl package contains the Tool Command Language.</para>
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| 6 |
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| 7 | <screen>Estimated build time: &tcl-time-tools;
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| 8 | Estimated required disk space: &tcl-compsize-tools;</screen>
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| 9 |
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| 10 | &aa-tcl-down;
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| 11 | &aa-tcl-dep;
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| 12 |
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| 13 | <sect2><title> </title><para> </para></sect2>
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| 14 |
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| 15 | <sect2>
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| 16 | <title>Installation of Tcl</title>
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| 17 |
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| 18 | <para>This package and the next two are only installed to be able to run the
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| 19 | test suites for GCC and Binutils. Installing three packages just for testing
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| 20 | purposes may seem like overkill, but it is very reassuring, if not essential,
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| 21 | to know that our most important tools are working properly.</para>
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| 22 |
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| 23 | <para>Prepare Tcl for compilation:</para>
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| 24 |
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| 25 | <screen><userinput>cd unix
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| 26 | ./configure --prefix=/tools</userinput></screen>
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| 27 |
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| 28 | <para>Build the package:</para>
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| 29 |
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| 30 | <screen><userinput>make</userinput></screen>
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| 31 |
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| 32 | <para>This package has a test suite available which can perform a number of
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| 33 | checks to ensure it built correctly. However, the Tcl test suite in this
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| 34 | chapter is known to experience failures under certain host conditions that are
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| 35 | not fully understood. Therefore, test suite failures here are not surprising,
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| 36 | but are not considered critical. Should you choose to run the test suite, the
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| 37 | following command will do so:</para>
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| 38 |
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| 39 | <screen><userinput>TZ=UTC make test</userinput></screen>
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| 40 |
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| 41 | <para>The meaning of the make parameter:</para>
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| 42 |
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| 43 | <itemizedlist>
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| 44 | <listitem><para><userinput>TZ=UTC</userinput>: This sets the time zone to
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| 45 | Coordinated Universal Time (UTC) also known as Greenwich Mean Time (GMT), but
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| 46 | only for the duration of the test suite run. This ensures the clock tests are
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| 47 | exercised correctly. More information on the TZ environment variable is
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| 48 | available later on in <xref linkend="chapter07"/>.</para></listitem>
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| 49 | </itemizedlist>
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| 50 |
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| 51 | <para>Sometimes, package test suites will give false failures. You can
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| 52 | consult the LFS Wiki at <ulink url="http://wiki.linuxfromscratch.org/"/>
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| 53 | to verify that these failures are normal. This applies to all tests
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| 54 | throughout the book.</para>
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| 55 |
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| 56 | <para>Install the package:</para>
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| 57 |
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| 58 | <screen><userinput>make install</userinput></screen>
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| 59 |
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| 60 | <important><para><emphasis>Do not remove</emphasis> the
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| 61 | <filename>tcl&tcl-version;</filename> source directory yet, as the next package
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| 62 | will need its internal headers.</para></important>
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| 63 |
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| 64 | <para>Make a necessary symbolic link:</para>
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| 65 |
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| 66 | <screen><userinput>ln -s tclsh8.4 /tools/bin/tclsh</userinput></screen>
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| 67 |
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| 68 | </sect2>
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| 69 |
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| 70 | &aa-tcl-shortdesc;
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| 71 | &aa-tcl-desc;
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| 72 |
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| 73 | </sect1>
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| 74 |
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