| 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 | <note><para>The test suite for GCC in this section is considered <emphasis>
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| 7 | critical</emphasis>. Do not skip it under any circumstances.</para></note>
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| 8 |
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| 9 | <para>This package is known to behave badly when you have changed its
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| 10 | default optimization flags (including the -march and -mcpu options).
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| 11 | Therefore, if you have defined any environment variables that override
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| 12 | default optimizations, such as CFLAGS and CXXFLAGS, we recommend unsetting
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| 13 | or modifying them when building GCC.</para>
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| 14 |
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| 15 | <para>This time we will build both the C and the C++ compiler, so you'll have
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| 16 | to unpack the GCC-core <emphasis>and</emphasis> the GCC-g++ tarball -- they
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| 17 | will unfold into the same directory. You should likewise extract the
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| 18 | GCC-testsuite package. The full GCC package contains even more
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| 19 | compilers. Instructions for building these can be found at
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| 20 | <ulink url="&blfs-root;view/cvs/general/gcc.html"/>.</para>
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| 21 |
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| 22 | <para><screen><userinput>patch -Np1 -i ../gcc-&gcc-version;-no_fixincludes-2.patch
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| 23 | patch -Np1 -i ../gcc-3.3.1-suppress-libiberty.patch</userinput></screen></para>
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| 24 |
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| 25 | <para>The second patch here suppresses the installation of libiberty from GCC,
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| 26 | as we will use the one provided by binutils instead.</para>
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| 27 |
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| 28 | <para>The GCC documentation recommends building GCC outside of the source
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| 29 | directory in a dedicated build directory:</para>
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| 30 |
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| 31 | <para><screen><userinput>mkdir ../gcc-build
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| 32 | cd ../gcc-build</userinput></screen></para>
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| 33 |
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| 34 | <para>Now prepare GCC for compilation:</para>
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| 35 |
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| 36 | <para><screen><userinput>../gcc-&gcc-version;/configure --prefix=/usr \
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| 37 | --enable-shared --enable-threads=posix \
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| 38 | --enable-__cxa_atexit --enable-clocale=gnu \
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| 39 | --enable-languages=c,c++</userinput></screen></para>
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| 40 |
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| 41 | <para>Compile the package:</para>
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| 42 |
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| 43 | <para><screen><userinput>make</userinput></screen></para>
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| 44 |
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| 45 | <para>Test the results, but don't stop at errors (you'll remember the few
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| 46 | known ones):</para>
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| 47 |
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| 48 | <para><screen><userinput>make -k check</userinput></screen></para>
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| 49 |
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| 50 | <para>And install the package:</para>
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| 51 |
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| 52 | <para><screen><userinput>make install</userinput></screen></para>
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| 53 |
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| 54 | <para>Some packages expect the C PreProcessor to be installed in the
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| 55 | <filename>/lib</filename> directory.
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| 56 | To honor those packages, create this symlink:</para>
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| 57 |
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| 58 | <para><screen><userinput>ln -s ../usr/bin/cpp /lib</userinput></screen></para>
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| 59 |
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| 60 | <para>Many packages use the name <userinput>cc</userinput> to call the C
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| 61 | compiler. To satisfy those packages, create a symlink:</para>
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| 62 |
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| 63 | <para><screen><userinput>ln -s gcc /usr/bin/cc</userinput></screen></para>
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| 64 |
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| 65 | </sect2>
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