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52 lines
2.1 KiB
XML
52 lines
2.1 KiB
XML
<sect2><title> </title><para> </para></sect2>
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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 unsetting
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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="chapter08"/>. This
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version is recommended
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by the kernel developers when you need absolute stability. Later versions of
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GCC have not received as much testing for Linux kernel compilation. Using a
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later version is likely to work, however, we recommend adhering to the kernel
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developer's advice and using the version here 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-2953-patch;
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patch -Np1 -i ../&gcc-2953-no-fixinc-patch;
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patch -Np1 -i ../&gcc-2953-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 gcc:</para>
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<screen><userinput>../gcc-2.95.3/configure --prefix=/opt/gcc-2.95.3 \
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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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