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diff --git a/chapter06/gcc-pass1.xml b/chapter06/gcc-pass1.xml new file mode 100644 index 000000000..1bd308f09 --- /dev/null +++ b/chapter06/gcc-pass1.xml @@ -0,0 +1,208 @@ +<?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-pass1" role="wrap" xreflabel="gcc-pass1"> + <?dbhtml filename="gcc-pass1.html"?> + + <sect1info condition="script"> + <productname>gcc-pass1</productname> + <productnumber>&gcc-version;</productnumber> + <address>&gcc-url;</address> + </sect1info> + + <title>GCC-&gcc-version; - Pass 1</title> + + <indexterm zone="ch-tools-gcc-pass1"> + <primary sortas="a-GCC">GCC</primary> + <secondary>tools, pass 1</secondary> + </indexterm> + + <sect2 role="package"> + <title/> + + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="../chapter06/gcc.xml" + xpointer="xpointer(/sect1/sect2[1]/para[1])"/> + + <segmentedlist> + <segtitle>&buildtime;</segtitle> + <segtitle>&diskspace;</segtitle> + + <seglistitem> + <seg>&gcc-ch5p1-sbu;</seg> + <seg>&gcc-ch5p1-du;</seg> + </seglistitem> + </segmentedlist> + + </sect2> + + <sect2 role="installation"> + <title>Installation of Cross GCC</title> + + <para>GCC requires the GMP, MPFR and MPC packages. As these packages may + not be included in your host distribution, they will be built with + GCC. Unpack each package into the GCC source directory and rename the + resulting directories so the GCC build procedures will automatically + use them:</para> + + <note><para>There are frequent misunderstandings about this chapter. The + procedures are the same as every other chapter as explained earlier (<xref + linkend='buildinstr'/>). First extract the gcc tarball from the sources + directory and then change to the directory created. Only then should you + proceed with the instructions below.</para></note> + +<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>On x86_64 hosts, set the default directory name for + 64-bit libraries to <quote>lib</quote>:</para> + +<screen><userinput remap="pre">case $(uname -m) in + x86_64) + sed -e '/m64=/s/lib64/lib/' \ + -i.orig gcc/config/i386/t-linux64 + ;; +esac</userinput></screen> + + <para>The GCC documentation recommends building GCC + in a dedicated build directory:</para> + +<screen><userinput remap="pre">mkdir -v build +cd build</userinput></screen> + + <para>Prepare GCC for compilation:</para> + +<screen><userinput remap="configure">../configure \ + --target=$LFS_TGT \ + --prefix=$LFS/tools \ + --with-glibc-version=2.11 \ + --with-sysroot=$LFS \ + --with-newlib \ + --without-headers \ + --enable-initfini-array \ + --disable-nls \ + --disable-shared \ + --disable-multilib \ + --disable-decimal-float \ + --disable-threads \ + --disable-libatomic \ + --disable-libgomp \ + --disable-libquadmath \ + --disable-libssp \ + --disable-libvtv \ + --disable-libstdcxx \ + --enable-languages=c,c++</userinput></screen> + <variablelist> + <title>The meaning of the configure options:</title> + + <varlistentry> + <term><parameter>--with-glibc-version=2.11</parameter></term> + <listitem> + <para>This option ensures the package will be compatible with the host's + version of glibc. It is set to the minimum glibc requirement + specified in the <xref linkend="ch-partitioning-hostreqs"/>.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><parameter>--with-newlib</parameter></term> + <listitem> + <para>Since a working C library is not yet available, this ensures + that the inhibit_libc constant is defined when building libgcc. This prevents + the compiling of any code that requires libc support.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><parameter>--without-headers</parameter></term> + <listitem> + <para>When creating a complete cross-compiler, GCC requires + standard headers compatible with the target system. For our + purposes these headers will not be needed. This switch prevents + GCC from looking for them.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><parameter>--disable-shared</parameter></term> + <listitem> + <para>This switch forces GCC to link its internal libraries + statically. We need this because the shared libraries require glibc, + which is not yet installed on the target system.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><parameter>--disable-decimal-float, --disable-threads, + --disable-libatomic, --disable-libgomp, <!--- -disable-libmpx,--> + --disable-libquadmath, --disable-libssp, --disable-libvtv, + --disable-libstdcxx</parameter></term> + <listitem> + <para>These switches disable support for the decimal floating point + extension, threading, libatomic, libgomp, <!--libmpx, --> libquadmath, libssp, + libvtv, and the C++ standard library respectively. These features + will fail to compile when building a cross-compiler and are not + necessary for the task of cross-compiling the temporary libc.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><parameter>--disable-multilib</parameter></term> + <listitem> + <para>On x86_64, LFS does not yet support a multilib configuration. + This switch is harmless for x86.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><parameter>--enable-languages=c,c++</parameter></term> + <listitem> + <para>This option ensures that only the C and C++ compilers are built. + These are the only languages needed now.</para> + </listitem> + </varlistentry> + + </variablelist> + + <para>Compile GCC by running:</para> + +<screen><userinput remap="make">make</userinput></screen> + + <para>Install the package:</para> + + <screen><userinput remap="install">make install</userinput></screen> + + <para>This build of GCC has installed a couple of internal system + headers. Normally one of them, <filename>limits.h</filename>, would in turn + include the corresponding system <filename>limits.h</filename> header, in + this case, <filename>$LFS/usr/include/limits.h</filename>. However, at the + time of this build of gcc <filename>$LFS/usr/include/limits.h</filename> + does not exist, so the internal header that has just been installed is a + partial, self-contained file and does not include the extended features of + the system header. This is adequate for building glibc, but the full + internal header will be needed later. Create a full version of the internal + header using a command that is identical to what the GCC build system does + in normal circumstances:</para> + +<screen><userinput remap="install">cd .. +cat gcc/limitx.h gcc/glimits.h gcc/limity.h > \ + `dirname $($LFS_TGT-gcc -print-libgcc-file-name)`/install-tools/include/limits.h</userinput></screen> + </sect2> + + <sect2 role="content"> + <title/> + + <para>Details on this package are located in + <xref linkend="contents-gcc" role="."/></para> + + </sect2> + +</sect1> |