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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3530 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
128 lines
5.2 KiB
XML
128 lines
5.2 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-tools-binutils-pass1">
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<title>Binutils-&binutils-version; - Pass 1</title>
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<?dbhtml filename="binutils-pass1.html"?>
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<indexterm zone="ch-tools-binutils-pass1">
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<primary sortas="a-Binutils">Binutils</primary>
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<secondary>tools, pass 1</secondary></indexterm>
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<xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="../chapter06/binutils.xml" xpointer="xpointer(/sect1/para[1])"/>
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<screen>&buildtime; 1.0 SBU
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&diskspace; 194 MB</screen>
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<xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="../chapter06/binutils.xml" xpointer="xpointer(/sect1/para[2])"/>
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<sect2>
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<title>Installation of Binutils</title>
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<para>It is important that Binutils be the first package to get compiled,
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because both Glibc and GCC perform various tests on the available linker and
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assembler to determine which of their own features to enable.</para>
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<para>This package is known to behave badly when you change its default
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optimization flags (including the <emphasis>-march</emphasis> and
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<emphasis>-mcpu</emphasis> options). Therefore, if you have defined any
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environment variables that override default optimizations, such as CFLAGS and
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CXXFLAGS, we recommend un-setting them when building Binutils.</para>
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<para>The Binutils documentation recommends building Binutils outside of the
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source directory in a dedicated build directory:</para>
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<screen><userinput>mkdir ../binutils-build
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cd ../binutils-build</userinput></screen>
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<note><para>If you want the SBU values listed in the rest of the book to be of
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any use, you will have to measure the time it takes to build this package --
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from the configuration up to and including the first install. To achieve this
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easily, you could wrap the four commands in a <command>time</command> command
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like this: <userinput>time { ./configure ... && ... && ...
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&& make install; }</userinput>.</para></note>
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<para>Now prepare Binutils for compilation:</para>
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<screen><userinput>../binutils-&binutils-version;/configure --prefix=/tools --disable-nls</userinput></screen>
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<para>The meaning of the configure options:</para>
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<itemizedlist>
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<listitem><para><userinput>--prefix=/tools</userinput>: This tells the
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configure script to prepare to install the Binutils programs in the
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<filename>/tools</filename> directory.</para></listitem>
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<listitem><para><userinput>--disable-nls</userinput>: This disables
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internationalization (a word often shortened to i18n). We don't need this
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for our static programs and <emphasis>nls</emphasis> often causes problems
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when linking statically.</para></listitem>
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</itemizedlist>
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<para>Continue with compiling the package:</para>
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<screen><userinput>make configure-host
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make LDFLAGS="-all-static"</userinput></screen>
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<para>The meaning of the make parameters:</para>
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<itemizedlist>
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<listitem><para><userinput>configure-host</userinput>: This forces all the
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subdirectories to be configured immediately. A statically linked build will
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fail without it. We therefore use this option to work around the
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problem.</para></listitem>
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<listitem><para><userinput>LDFLAGS="-all-static"</userinput>: This tells the
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linker that all the Binutils programs should be linked statically. However,
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strictly speaking, <emphasis>"-all-static"</emphasis> is passed to the
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<command>libtool</command> program, which then passes
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<emphasis>"-static"</emphasis> to the linker.</para></listitem>
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</itemizedlist>
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<para>Compilation is complete. Normally we would now run the test suite, but
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at this early stage the test suite framework (Tcl, Expect and DejaGnu) is not
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yet in place. And there would be little point in running the tests anyhow,
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since the programs from this first pass will soon be replaced by those from the
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second.</para>
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<para>Now install the package:</para>
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<screen><userinput>make install</userinput></screen>
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<para>Now prepare the linker for the <quote>Adjusting</quote> phase later on:</para>
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<screen><userinput>make -C ld clean
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make -C ld LDFLAGS="-all-static" LIB_PATH=/tools/lib</userinput></screen>
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<para>The meaning of the make parameters:</para>
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<itemizedlist>
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<listitem><para><userinput>-C ld clean</userinput>: This tells the make program
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to remove all the compiled files in the <filename class="directory">ld</filename> subdirectory.</para></listitem>
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<listitem><para><userinput>-C ld LDFLAGS="-all-static"
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LIB_PATH=/tools/lib</userinput>: This option rebuilds everything in the
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<filename class="directory">ld</filename> subdirectory. Specifying the LIB_PATH
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makefile variable on the command line allows us to override the default value
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and have it point to our temporary tools location. The value of this variable
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specifies the linker's default library search path. You will see how this
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preparation is used later on in the chapter.</para></listitem>
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</itemizedlist>
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<warning><para><emphasis>Do not yet remove</emphasis> the Binutils build and
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source directories. You will need them again in their current state a bit
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further on in this chapter.</para></warning>
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</sect2>
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<sect2><title/>
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<para>The details on this package are found in <xref linkend="contents-binutils"/>.</para>
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</sect2>
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</sect1>
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