| 1 | <sect2>
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| 2 | <title>Command explanations</title>
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| 3 |
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| 4 | <para><userinput>--enable-static-link:</userinput> This configure
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| 5 | option causes Bash to be linked statically</para>
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| 6 |
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| 7 | <para><userinput>--prefix=$LFS/usr:</userinput> This configure option installs
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| 8 | all of Bash's files under the $LFS/usr directory, which becomes the /usr
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| 9 | directory when chroot'ed or reboot'ed into LFS.</para>
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| 10 |
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| 11 | <para><userinput>--bindir=$LFS/bin:</userinput> This installs the executable
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| 12 | files in $LFS/bin. We do this because we want bash to be in /bin, not in
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| 13 | /usr/bin. One reason being: the /usr partition might be on a separate
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| 14 | partition which has to be mounted at some point. Before that partition is
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| 15 | mounted you need and will want to have bash available (it will be hard to
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| 16 | execute the boot scripts without a shell for instance).</para>
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| 17 |
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| 18 | <para><userinput>--with-curses:</userinput> This causes Bash to be
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| 19 | linked against the curses library instead of the default termcap
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| 20 | library which is becoming obsolete.</para>
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| 21 |
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| 22 | <para>It is not strictly necessary for the static bash to be linked
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| 23 | against libncurses (it can link against a static termcap for the time
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| 24 | being just fine because we will reinstall Bash in chapter 6 anyways,
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| 25 | where we will use libncurses), but it's a good test to make sure that
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| 26 | the ncurses package has been installed properly. If not, you will get in
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| 27 | trouble later on in this chapter when you install the Texinfo package.
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| 28 | That package requires ncurses and termcap can't reliably be used
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| 29 | there.</para>
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| 30 |
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| 31 | <para><userinput>ln -sf bash sh:</userinput> This command creates the sh
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| 32 | symlink that points to bash. Most scripts run themselves via 'sh'
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| 33 | (invoked by the #!/bin/sh as the first line in the scripts) which
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| 34 | invokes a special bash mode. Bash will then behave (as closely as
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| 35 | possible) as the original Bourne shell.</para>
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| 36 |
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| 37 | <para>The <userinput>&&</userinput>'s at the end of every line cause
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| 38 | the next command to be executed only if the previous command exists
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| 39 | with a return value of 0 indicating success. In case all of these
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| 40 | commands are copy&pasted
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| 41 | on the shell, is is important to be ensured that if
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| 42 | ./configure fails, make isn't being executed and, likewise, if make fails,
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| 43 | that make install isn't being executed, and so forth.</para>
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| 44 |
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| 45 | </sect2>
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| 46 |
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