source: chapter08/libffi.xml@ 8d35535

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Last change on this file since 8d35535 was 8d35535, checked in by Xi Ruoyao <xry111@…>, 10 months ago

clean up short descriptions

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@12137 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-libffi" role="wrap">
9 <?dbhtml filename="libffi.html"?>
10
11 <sect1info condition="script">
12 <productname>libffi</productname>
13 <productnumber>&libffi-version;</productnumber>
14 <address>&libffi-url;</address>
15 </sect1info>
16
17 <title>Libffi-&libffi-version;</title>
18
19 <indexterm zone="ch-system-libffi">
20 <primary sortas="a-libffi">libffi</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Libffi library provides a portable, high level programming
27 interface to various calling conventions. This allows a programmer to call
28 any function specified by a call interface description at run time.</para>
29
30 <segmentedlist>
31 <segtitle>&buildtime;</segtitle>
32 <segtitle>&diskspace;</segtitle>
33
34 <seglistitem>
35 <seg>&libffi-fin-sbu;</seg>
36 <seg>&libffi-fin-du;</seg>
37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Libffi</title>
44
45 <note>
46 <para>Similar to GMP, libffi builds with optimizations specific
47 to the proccesor in use. If building for another system, export
48 CFLAGS and CXXFLAGS to specify a generic build for your architecture.
49 If this is not done, all applications that link to libffi will trigger
50 Illegal Operation Errors.</para>
51 </note>
52
53 <para>Prepare libffi for compilation:</para>
54
55<screen><userinput remap="configure">./configure --prefix=/usr --disable-static --with-gcc-arch=native</userinput></screen>
56
57 <variablelist>
58 <title>The meaning of the configure option:</title>
59
60 <varlistentry>
61 <term><parameter>--with-gcc-arch=native</parameter></term>
62 <listitem>
63 <para>Ensure GCC optimizes for the current system. If this
64 is not specified, the system is guessed and the code generated
65 may not be correct for some systems. If the generated code
66 will be copied from the native system to a less capable
67 system, use the less capable system as a parameter. For details
68 about alternative system types, see <ulink
69 url='https://gcc.gnu.org/onlinedocs/gcc-&gcc-version;/gcc/x86-Options.html'>
70 the x86 options in the GCC manual</ulink>.</para>
71 </listitem>
72 </varlistentry>
73
74 </variablelist>
75
76 <para>Compile the package:</para>
77
78<screen><userinput remap="make">make</userinput></screen>
79
80 <para>To test the results, issue:</para>
81
82<screen><userinput remap="test">make check</userinput></screen>
83
84 <para>Install the package:</para>
85
86<screen><userinput remap="install">make install</userinput></screen>
87
88 </sect2>
89
90 <sect2 id="contents-libffi" role="content">
91 <title>Contents of Libffi</title>
92
93 <segmentedlist>
94 <segtitle>Installed library</segtitle>
95
96 <seglistitem>
97 <seg>libffi.so</seg>
98 </seglistitem>
99 </segmentedlist>
100
101 <variablelist>
102 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
103 <?dbfo list-presentation="list"?>
104 <?dbhtml list-presentation="table"?>
105
106 <varlistentry id="libffi">
107 <term><filename class="libraryfile">libffi</filename></term>
108 <listitem>
109 <para>contains the foreign function interface API functions</para>
110 <indexterm zone="ch-system-libffi">
111 <primary sortas="c-libffi">libffi</primary>
112 </indexterm>
113 </listitem>
114 </varlistentry>
115 </variablelist>
116
117 </sect2>
118
119</sect1>
120
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