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-<?xml version="1.0" encoding="ISO-8859-1"?>
-<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
- "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
- <!ENTITY % general-entities SYSTEM "../general.ent">
- %general-entities;
-]>
-
-<sect1 id="ch-tools-gcc-pass2" role="wrap">
- <?dbhtml filename="gcc-pass2.html"?>
-
- <sect1info condition="script">
- <productname>gcc-pass2</productname>
- <productnumber>&gcc-version;</productnumber>
- <address>&gcc-url;</address>
- </sect1info>
-
- <title>GCC-&gcc-version; - Pass 2</title>
-
- <indexterm zone="ch-tools-gcc-pass2">
- <primary sortas="a-GCC">GCC</primary>
- <secondary>tools, pass 2</secondary>
- </indexterm>
-
- <sect2 role="package">
- <title/>
-
- <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
- href="../chapter08/gcc.xml"
- xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
-
- <segmentedlist>
- <segtitle>&buildtime;</segtitle>
- <segtitle>&diskspace;</segtitle>
-
- <seglistitem>
- <seg>&gcc-ch5p2-sbu;</seg>
- <seg>&gcc-ch5p2-du;</seg>
- </seglistitem>
- </segmentedlist>
-
- </sect2>
-
- <sect2 role="installation">
- <title>Installation of GCC</title>
-
- <para>As in the first build of GCC, the GMP, MPFR, and MPC packages are
- required. Unpack the tarballs and move them into the required directory
- names:</para>
-
-<screen><userinput remap="pre">tar -xf ../mpfr-&mpfr-version;.tar.xz
-mv -v mpfr-&mpfr-version; mpfr
-tar -xf ../gmp-&gmp-version;.tar.xz
-mv -v gmp-&gmp-version; gmp
-tar -xf ../mpc-&mpc-version;.tar.gz
-mv -v mpc-&mpc-version; mpc</userinput></screen>
-
- <para>If building on x86_64, change the default directory name for 64-bit
- libraries to <quote>lib</quote>:</para>
-
-<screen><userinput remap="pre">case $(uname -m) in
- x86_64)
- sed -e '/m64=/s/lib64/lib/' \
- -i.orig gcc/config/i386/t-linux64
- ;;
-esac</userinput></screen>
-
- <para>Fix an issue with GCC-10.1 when building with a cross
- compiler:</para>
-
-<screen><userinput remap="pre">patch -Np1 -i ../&gcc-cross-patch;</userinput></screen>
-
- <para>Create a separate build directory again:</para>
-
-<screen><userinput remap="pre">mkdir -v build
-cd build</userinput></screen>
-
- <para>Create a symlink that allos libgcc to be built with posix threads
- support:</para>
-
-<screen><userinput remap="pre">mkdir -pv $LFS_TGT/libgcc
-ln -s ../../../libgcc/gthr-posix.h $LFS_TGT/libgcc/gthr-default.h</userinput></screen>
-
- <para>Before starting to build GCC, remember to unset any environment
- variables that override the default optimization flags.</para>
-
- <para>Now prepare GCC for compilation:</para>
-
-<screen><userinput remap="configure">../configure \
- --build=$(../config.guess) \
- --host=$LFS_TGT \
- --prefix=/usr \
- CC_FOR_TARGET=$LFS_TGT-gcc \
- --with-build-sysroot=$LFS \
- --enable-initfini-array \
- --disable-nls \
- --disable-multilib \
- --disable-decimal-float \
- --disable-libatomic \
- --disable-libgomp \
- --disable-libquadmath \
- --disable-libssp \
- --disable-libvtv \
- --disable-libstdcxx \
- --enable-languages=c,c++</userinput></screen>
-
- <variablelist>
- <title>The meaning of the new configure options:</title><!-- WIP -->
-
- <varlistentry>
- <term><parameter>-with-build-sysroot=$LFS</parameter></term>
- <listitem>
- <para>Normally, using <parameter>--host=</parameter> ensures that
- a cross-compiler is used for building gcc, and that compiler knows
- that it has to look for headers and libraries in <filename
- class="directory">$LFS</filename>. But the build system of GCC uses
- other tools, which are not aware of this location. This switch is
- needed to have them find the needed files in <filename
- class="directory">$LFS</filename>, and not on the host.</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term><parameter>--enable-initfini-array</parameter></term>
- <listitem>
- <para>This option is automatically enabled when building a native
- compiler with a native compiler on x86. But here, we build with
- a cross compiler, so we need to explicitely set this option.</para>
- </listitem>
- </varlistentry>
-
- </variablelist>
-
- <para>Compile the package:</para>
-
-<screen><userinput remap="make">make</userinput></screen>
-
- <para>Install the package:</para>
-
-<screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
-
- <para>As a finishing touch, create a symlink. Many programs and scripts
- run <command>cc</command> instead of <command>gcc</command>, which is
- used to keep programs generic and therefore usable on all kinds of UNIX
- systems where the GNU C compiler is not always installed. Running
- <command>cc</command> leaves the system administrator free to decide
- which C compiler to install:</para>
-
-<screen><userinput remap="install">ln -sv gcc $LFS/usr/bin/cc</userinput></screen>
-
- </sect2>
-
- <sect2 role="content">
- <title/>
-
- <para>Details on this package are located in
- <xref linkend="contents-gcc" role="."/></para>
-
- </sect2>
-
-</sect1>