source: chapter06/file-inst.xml@ fa914e5

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Last change on this file since fa914e5 was 2b1174be, checked in by Gerard Beekmans <gerard@…>, 23 years ago

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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@1113 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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1<sect2>
2<title>Installation of File</title>
3
4<para>Note that the sed used in this installation only works if the line
5break is placed exactly where it below. Don't try and put it
6all on one line otherwise it won't work.</para>
7
8<para>Install File by running the following commands:</para>
9
10<para><screen><userinput>cp readelf.h readelf.h.backup &amp;&amp;</userinput>
11<userinput>sed '/#define __/a \</userinput>
12<userinput>&nbsp;&nbsp;&nbsp;#include &lt;stdint.h&gt;' readelf.h.backup &gt; readelf.h &amp;&amp;</userinput>
13<userinput>./configure --prefix=/usr --datadir=/usr/share/misc &amp;&amp;</userinput>
14<userinput>make &amp;&amp;</userinput>
15<userinput>make install</userinput></screen></para>
16
17<para>File uses magic numbers to determine a file type. These magic numbers
18come with File in a plain text file. File internally compiles this database
19each time it is run. This is not the normal type of operation for File since
20compiling a
21plain text file each time is not the fastest way to do it. File offers an
22option "-C" to compile this magic number file. The reason this isn't done
23automatically is that some people like to work on the magic numbers. On the
24other hand many people didn't get it that they should compile the magic
25numbers, so the author of File added a warning when the plain text magic file
26is used. As we usually won't work on the plain text magic file, we
27compile this file, because it's faster, fixes that annoying warning and is how
28it was meant to be:</para>
29
30<para><screen><userinput>file -C</userinput></screen></para>
31
32</sect2>
33
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