[b0aabe0] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-system-libffi" role="wrap">
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| 9 | <?dbhtml filename="libffi.html"?>
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| 10 |
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| 11 | <sect1info condition="script">
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| 12 | <productname>libffi</productname>
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| 13 | <productnumber>&libffi-version;</productnumber>
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| 14 | <address>&libffi-url;</address>
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| 15 | </sect1info>
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| 16 |
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[e03d5e49] | 17 | <title>Libffi-&libffi-version;</title>
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[b0aabe0] | 18 |
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| 19 | <indexterm zone="ch-system-libffi">
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| 20 | <primary sortas="a-libffi">libffi</primary>
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| 21 | </indexterm>
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| 22 |
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| 23 | <sect2 role="package">
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| 24 | <title/>
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| 25 |
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[e03d5e49] | 26 | <para>The Libffi library provides a portable, high level programming
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[b0aabe0] | 27 | interface to various calling conventions. This allows a programmer to call
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| 28 | any function specified by a call interface description at run time.</para>
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[e9c46b3] | 29 |
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| 30 | <para>FFI stands for Foreign Function Interface. An FFI allows a program written
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| 31 | in one language to call a program written in another language. Specifically,
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| 32 | Libffi can provide a bridge between an interpreter like Perl, or Python, and
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| 33 | shared library subroutines written in C, or C++.</para>
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[b0aabe0] | 34 |
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| 35 | <segmentedlist>
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| 36 | <segtitle>&buildtime;</segtitle>
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| 37 | <segtitle>&diskspace;</segtitle>
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| 38 |
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| 39 | <seglistitem>
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[6dfcfecc] | 40 | <seg>&libffi-fin-sbu;</seg>
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| 41 | <seg>&libffi-fin-du;</seg>
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[b0aabe0] | 42 | </seglistitem>
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| 43 | </segmentedlist>
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| 44 |
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| 45 | </sect2>
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| 46 |
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| 47 | <sect2 role="installation">
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[e03d5e49] | 48 | <title>Installation of Libffi</title>
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[b0aabe0] | 49 |
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[8dbae30] | 50 | <note>
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[e9c46b3] | 51 | <para>Like GMP, Libffi builds with optimizations specific
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[ab7af9e] | 52 | to the processor in use. If building for another system, change the
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| 53 | value of the <parameter>--with-gcc-arch=</parameter> parameter in the
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| 54 | following command to an architecture name fully implemented by the
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| 55 | CPU on that system.
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[20d6b70] | 56 | If this is not done, all applications that link to
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| 57 | <filename class='libraryfile'>libffi</filename> will trigger
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[8dbae30] | 58 | Illegal Operation Errors.</para>
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| 59 | </note>
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[6dfcfecc] | 60 |
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[e9c46b3] | 61 | <para>Prepare Libffi for compilation:</para>
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[b0aabe0] | 62 |
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[3ba82a8] | 63 | <screen><userinput remap="configure">./configure --prefix=/usr \
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| 64 | --disable-static \
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| 65 | --with-gcc-arch=native \
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[c3f8922] | 66 | --disable-exec-static-tramp</userinput></screen>
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[b8b65b7] | 67 |
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| 68 | <variablelist>
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| 69 | <title>The meaning of the configure option:</title>
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| 70 |
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| 71 | <varlistentry>
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| 72 | <term><parameter>--with-gcc-arch=native</parameter></term>
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| 73 | <listitem>
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[6dfcfecc] | 74 | <para>Ensure GCC optimizes for the current system. If this
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[b8b65b7] | 75 | is not specified, the system is guessed and the code generated
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[e9c46b3] | 76 | may not be correct. If the generated code
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[d672ab7] | 77 | will be copied from the native system to a less capable
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| 78 | system, use the less capable system as a parameter. For details
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| 79 | about alternative system types, see <ulink
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[2c53f52] | 80 | url='https://gcc.gnu.org/onlinedocs/gcc-&gcc-version;/gcc/x86-Options.html'>
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[6dfcfecc] | 81 | the x86 options in the GCC manual</ulink>.</para>
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[b8b65b7] | 82 | </listitem>
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| 83 | </varlistentry>
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| 84 |
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[c3f8922] | 85 | <varlistentry>
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[0a99387] | 86 | <!-- To editors: try to remove it once GJS fixed (at GNOME 43) -->
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[c3f8922] | 87 | <term><parameter>--disable-exec-static-tramp</parameter></term>
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| 88 | <listitem>
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[e9c46b3] | 89 | <para>Disable static trampoline support, a new security
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| 90 | feature in Libffi. Some BLFS packages (notably
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[0a99387] | 91 | <application>GJS</application>) have not been adapted for it.</para>
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[c3f8922] | 92 | </listitem>
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| 93 | </varlistentry>
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| 94 |
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[b8b65b7] | 95 | </variablelist>
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[b0aabe0] | 96 |
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| 97 | <para>Compile the package:</para>
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| 98 |
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| 99 | <screen><userinput remap="make">make</userinput></screen>
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| 100 |
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| 101 | <para>To test the results, issue:</para>
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| 102 |
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| 103 | <screen><userinput remap="test">make check</userinput></screen>
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| 104 |
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| 105 | <para>Install the package:</para>
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| 106 |
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| 107 | <screen><userinput remap="install">make install</userinput></screen>
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| 108 |
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| 109 | </sect2>
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| 110 |
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[6dfcfecc] | 111 | <!-- - - - - - - - - - -->
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| 112 | <!-- Multilib - 32bit -->
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| 113 | <!-- - - - - - - - - - -->
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[fd48baa] | 114 |
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| 115 | <sect2 arch="ml_32,ml_all" role="installation">
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[6dfcfecc] | 116 | <title>Installation of Libffi - 32bit</title>
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[b3f1ebb3] | 117 |
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| 118 | <para>Clean previous build:</para>
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| 119 |
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| 120 | <screen><userinput remap="pre">make distclean</userinput></screen>
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| 121 |
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| 122 | <para>Prepare Libffi for compilation:</para>
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| 123 |
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[6dfcfecc] | 124 | <screen><userinput remap="configure">CC="gcc -m32" CXX="g++ -m32" ./configure \
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[cd3fd92] | 125 | --host=i686-pc-linux-gnu \
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[b3f1ebb3] | 126 | --prefix=/usr \
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[cd3fd92] | 127 | --libdir=/usr/lib32 \
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[b3f1ebb3] | 128 | --disable-static \
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| 129 | --with-gcc-arch=i686 \
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[cd3fd92] | 130 | --disable-exec-static-tramp</userinput></screen>
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[b3f1ebb3] | 131 |
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| 132 | <para>Compile the package:</para>
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| 133 |
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| 134 | <screen><userinput remap="make">make</userinput></screen>
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| 135 |
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| 136 | <para>To test the results, issue:</para>
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| 137 |
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| 138 | <screen><userinput remap="test">make check</userinput></screen>
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| 139 |
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| 140 | <para>Install the package:</para>
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| 141 |
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| 142 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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[0ebda11] | 143 | cp -Rv DESTDIR/usr/lib32/* /usr/lib32
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[b3f1ebb3] | 144 | rm -rf DESTDIR</userinput></screen>
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| 145 |
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[6dfcfecc] | 146 | </sect2><!-- m32 -->
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[b3f1ebb3] | 147 |
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[6dfcfecc] | 148 | <!-- - - - - - - - - - -->
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| 149 | <!-- Multilib - x32bit -->
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| 150 | <!-- - - - - - - - - - -->
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[fd48baa] | 151 |
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| 152 | <sect2 arch="ml_x32,ml_all" role="installation">
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[bd1abf6] | 153 | <title>Installation of Libffi - x32bit</title>
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[b3f1ebb3] | 154 |
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| 155 | <para>Clean previous build:</para>
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| 156 |
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| 157 | <screen><userinput remap="pre">make distclean</userinput></screen>
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| 158 |
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| 159 | <para>Prepare Libffi for compilation:</para>
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| 160 |
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[6dfcfecc] | 161 | <screen><userinput remap="configure">CC="gcc -mx32" CXX="g++ -mx32" ./configure \
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[cd3fd92] | 162 | --host=x86_64-unknown-linux-gnux32 \
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[6dfcfecc] | 163 | --prefix=/usr \
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[0ebda11] | 164 | --libdir=/usr/libx32 \
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[cd3fd92] | 165 | --disable-static \
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[6dfcfecc] | 166 | --with-gcc-arch=x86_64 \
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[cd3fd92] | 167 | --disable-exec-static-tramp</userinput></screen>
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[b3f1ebb3] | 168 |
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| 169 | <para>Compile the package:</para>
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| 170 |
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| 171 | <screen><userinput remap="make">make</userinput></screen>
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| 172 |
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| 173 | <para>To test the results, issue:</para>
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| 174 |
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| 175 | <screen><userinput remap="test">make check</userinput></screen>
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| 176 |
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| 177 | <para>Install the package:</para>
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| 178 |
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| 179 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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[0ebda11] | 180 | cp -Rv DESTDIR/usr/libx32/* /usr/libx32
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[b3f1ebb3] | 181 | rm -rf DESTDIR</userinput></screen>
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| 182 |
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[6dfcfecc] | 183 | </sect2><!-- mx32 -->
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[b3f1ebb3] | 184 |
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[b0aabe0] | 185 | <sect2 id="contents-libffi" role="content">
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[e03d5e49] | 186 | <title>Contents of Libffi</title>
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[b0aabe0] | 187 |
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| 188 | <segmentedlist>
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| 189 | <segtitle>Installed library</segtitle>
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| 190 |
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| 191 | <seglistitem>
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| 192 | <seg>libffi.so</seg>
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| 193 | </seglistitem>
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| 194 | </segmentedlist>
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| 195 |
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| 196 | <variablelist>
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| 197 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 198 | <?dbfo list-presentation="list"?>
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| 199 | <?dbhtml list-presentation="table"?>
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| 200 |
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| 201 | <varlistentry id="libffi">
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| 202 | <term><filename class="libraryfile">libffi</filename></term>
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| 203 | <listitem>
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[e9c46b3] | 204 | <para>Contains the foreign function interface API functions</para>
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[b0aabe0] | 205 | <indexterm zone="ch-system-libffi">
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| 206 | <primary sortas="c-libffi">libffi</primary>
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| 207 | </indexterm>
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| 208 | </listitem>
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| 209 | </varlistentry>
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| 210 | </variablelist>
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| 211 |
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| 212 | </sect2>
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| 213 |
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| 214 | </sect1>
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