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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3435 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
65 lines
2.6 KiB
XML
65 lines
2.6 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-system-gcc-2953">
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<title>GCC-&gcc-2953-version;</title>
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<?dbhtml filename="gcc-2953.html"?>
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<indexterm zone="ch-system-gcc-2953"><primary sortas="a-GCC-2953">GCC-2953</primary></indexterm>
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<screen>&buildtime; 1.5 SBU
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&buildtime; 130 MB</screen>
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<sect2>
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<title>Installation of GCC</title>
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<para>This package is known to behave badly when you have changed its
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default optimization flags (including the -march and -mcpu options).
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Therefore, if you have defined any environment variables that override
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default optimizations, such as CFLAGS and CXXFLAGS, we recommend un-setting
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or modifying them when building GCC.</para>
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<para>This is an older release of GCC which we are going to install for the
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purpose of compiling the Linux kernel in <xref linkend="chapter-bootable"/>.
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This version is recommended by the kernel developers when you need absolute
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stability. Later versions of GCC have not received as much testing for Linux
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kernel compilation. Using a later version is likely to work, however, we
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recommend adhering to the kernel developer's advice and using the version here
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to compile your kernel.</para>
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<note><para>We don't install the C++ compiler or libraries here. However, there
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may be reasons why you would want to install them. More information can be found
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at <ulink url="&blfs-root;view/stable/general/gcc2.html"/>.</para></note>
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<para>We'll install this older release of GCC into the non-standard prefix of
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<filename class="directory">/opt</filename> so as to avoid interfering with
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the system GCC already installed in <filename class="directory">/usr</filename>
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.</para>
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<para>Apply the patches and make a small adjustment:</para>
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<screen><userinput>patch -Np1 -i ../gcc-&gcc-2953-version;-2.patch
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patch -Np1 -i ../gcc-&gcc-2953-version;-no-fixinc.patch
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patch -Np1 -i ../gcc-&gcc-2953-version;-returntype-fix.patch
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echo timestamp > gcc/cstamp-h.in</userinput></screen>
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<para>The GCC documentation recommends building GCC outside of the source
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directory in a dedicated build directory:</para>
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<screen><userinput>mkdir ../gcc-2-build
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cd ../gcc-2-build</userinput></screen>
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<para>Compile and install the compiler:</para>
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<screen><userinput>../gcc-&gcc-2953-version;/configure --prefix=/opt/gcc-&gcc-2953-version; \
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--enable-shared --enable-languages=c \
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--enable-threads=posix
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make bootstrap
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make install</userinput></screen>
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</sect2>
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</sect1>
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