| 1 | <sect2><title> </title><para> </para></sect2>
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| 2 |
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| 3 | <sect2>
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| 4 | <title>Installation of GCC</title>
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| 5 |
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| 6 | <para>This package is known to behave badly when you have changed its
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| 7 | default optimization flags (including the -march and -mcpu options).
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| 8 | Therefore, if you have defined any environment variables that override
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| 9 | default optimizations, such as CFLAGS and CXXFLAGS, we recommend unsetting
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| 10 | or modifying them when building GCC.</para>
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| 11 |
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| 12 | <para>This is an older release of GCC which we are going to install for the
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| 13 | purpose of compiling the Linux kernel in <xref linkend="chapter08"/>. This
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| 14 | version is recommended
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| 15 | by the kernel developers when you need absolute stability. Later versions of
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| 16 | GCC have not received as much testing for Linux kernel compilation. Using a
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| 17 | later version is likely to work, however, we recommend adhering to the kernel
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| 18 | developer's advice and using the version here to compile your kernel.</para>
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| 19 |
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| 20 | <note><para>We don't install the C++ compiler or libraries here. However, there
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| 21 | may be reasons why you would want to install them. More information can be found
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| 22 | at <ulink url="&blfs-root;view/stable/general/gcc2.html"/>.</para></note>
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| 23 |
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| 24 | <para>We'll install this older release of GCC into the non-standard prefix of
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| 25 | <filename class="directory">/opt</filename> so as to avoid interfering with
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| 26 | the system GCC already installed in <filename class="directory">/usr</filename>
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| 27 | .</para>
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| 28 |
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| 29 | <para>Apply the patches and make a small adjustment:</para>
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| 30 |
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| 31 | <screen><userinput>patch -Np1 -i ../&gcc-2953-patch;
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| 32 | patch -Np1 -i ../&gcc-2953-no-fixinc-patch;
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| 33 | patch -Np1 -i ../&gcc-2953-returntype-fix-patch;
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| 34 | echo timestamp > gcc/cstamp-h.in</userinput></screen>
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| 35 |
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| 36 | <para>The GCC documentation recommends building GCC outside of the source
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| 37 | directory in a dedicated build directory:</para>
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| 38 |
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| 39 | <screen><userinput>mkdir ../gcc-2-build
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| 40 | cd ../gcc-2-build</userinput></screen>
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| 41 |
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| 42 | <para>Compile and install gcc:</para>
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| 43 |
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| 44 | <screen><userinput>../gcc-2.95.3/configure --prefix=/opt/gcc-2.95.3 \
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| 45 | --enable-shared --enable-languages=c \
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| 46 | --enable-threads=posix
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| 47 | make bootstrap
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| 48 | make install</userinput></screen>
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| 49 |
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| 50 | </sect2>
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| 51 |
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