| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-system-gcc" role="wrap">
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| 9 | <?dbhtml filename="gcc.html"?>
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| 10 |
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| 11 | <title>GCC-&gcc-version;</title>
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| 12 |
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| 13 | <indexterm zone="ch-system-gcc">
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| 14 | <primary sortas="a-GCC">GCC</primary>
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| 15 | </indexterm>
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| 16 |
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| 17 | <sect2 role="package">
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| 18 | <title/>
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| 19 |
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| 20 | <para>The GCC package contains the GNU compiler collection, which includes
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| 21 | the C and C++ compilers.</para>
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| 22 |
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| 23 | </sect2>
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| 24 |
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| 25 | <sect2 role="installation">
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| 26 | <title>Installation of GCC</title>
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| 27 |
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| 28 | <para os="p1">The following patch contains a number of updates to the
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| 29 | &gcc-version; branch by the GCC developers:</para>
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| 30 |
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| 31 | <screen os="p2"><userinput>patch -Np1 -i ../&gcc-branch_update-patch;</userinput></screen>
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| 32 |
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| 33 | <para os="fix1">Apply a <command>sed</command> subsitution that will
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| 34 | suppress the execution of the <command>fixincludes</command> script:</para>
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| 35 |
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| 36 | <screen os="fix2"><userinput>cp -v gcc/Makefile.in{,.orig}
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| 37 | sed 's@\./fixinc\.sh@-c true@' gcc/Makefile.in.orig > gcc/Makefile.in</userinput></screen>
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| 38 |
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| 39 | <para os="d">Apply a <command>sed</command> substitution that will suppress the
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| 40 | installation of <filename class="libraryfile">libiberty.a</filename>. The
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| 41 | version of <filename class="libraryfile">libiberty.a</filename> provided by
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| 42 | Binutils will be used instead:</para>
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| 43 |
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| 44 | <screen os="e"><userinput>sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in</userinput></screen>
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| 45 |
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| 46 | <para os="f">The GCC documentation recommends building GCC outside of the source
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| 47 | directory in a dedicated build directory:</para>
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| 48 |
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| 49 | <screen os="g"><userinput>mkdir -v ../gcc-build
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| 50 | cd ../gcc-build</userinput></screen>
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| 51 |
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| 52 | <para os="h">Prepare GCC for compilation:</para>
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| 53 |
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| 54 | <screen os="i"><userinput>CC="gcc -isystem /usr/include" \
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| 55 | CXX="g++ -isystem /usr/include" \
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| 56 | LDFLAGS="-Wl,-rpath-link,/usr/lib:/lib" \
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| 57 | ../gcc-&gcc-version;/configure --prefix=/usr \
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| 58 | --libexecdir=/usr/lib --enable-shared --enable-threads=posix \
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| 59 | --enable-__cxa_atexit --enable-c99 --enable-long-long \
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| 60 | --enable-clocale=gnu --enable-languages=c,c++ \
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| 61 | --disable-multilib --disable-libstdcxx-pch \
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| 62 | --enable-cloog-backend=isl --disable-isl-version-check --with-system-zlib \
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| 63 | --enable-checking=release --enable-libstdcxx-time \
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| 64 | --disable-install-libiberty</userinput></screen>
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| 65 |
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| 66 | <para os="j">Compile the package:</para>
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| 67 |
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| 68 | <screen os="k"><userinput>make</userinput></screen>
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| 69 |
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| 70 | <important os="l">
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| 71 | <para>The test suite for GCC is considered
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| 72 | critical. Do not skip it under any circumstance.</para>
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| 73 | </important>
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| 74 |
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| 75 | <para os="s1">Increase the stack size prior to running the tests:</para>
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| 76 |
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| 77 | <screen os="s2"><userinput remap="test">ulimit -s 32768</userinput></screen>
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| 78 |
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| 79 | <para os="m">Test the results, but do not stop at errors:</para>
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| 80 |
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| 81 | <screen os="n"><userinput remap="test">make -k check</userinput></screen>
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| 82 |
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| 83 | <para os="o">The <parameter>-k</parameter> flag is used to make the test suite
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| 84 | run through to completion and not stop at the first failure. The GCC test
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| 85 | suite is very comprehensive and is almost guaranteed to generate a few
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| 86 | failures. To receive a summary of the test suite results, run:</para>
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| 87 |
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| 88 | <screen os="p"><userinput remap="test">../gcc-&gcc-version;/contrib/test_summary</userinput></screen>
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| 89 |
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| 90 | <para os="q">For only the summaries, pipe the output through
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| 91 | <userinput>grep -A7 Summ</userinput>.</para>
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| 92 |
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| 93 | <para os="r">A few unexpected failures cannot always be avoided. The
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| 94 | GCC developers are usually aware of these issues, but have not
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| 95 | resolved them yet.</para>
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| 96 |
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| 97 | <para os="s">Install the package:</para>
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| 98 |
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| 99 | <screen os="t"><userinput>make install</userinput></screen>
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| 100 |
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| 101 | <para os="u">Some packages expect the C preprocessor to be installed in the
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| 102 | <filename class="directory">/lib</filename> directory.
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| 103 | To support those packages, create this symlink:</para>
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| 104 |
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| 105 | <screen os="v"><userinput>ln -sv ../usr/bin/cpp /lib</userinput></screen>
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| 106 |
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| 107 | <para os="w">Many packages use the name <command>cc</command> to call the C
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| 108 | compiler. To satisfy those packages, create a symlink:</para>
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| 109 |
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| 110 | <screen os="x"><userinput>ln -sv gcc /usr/bin/cc</userinput></screen>
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| 111 |
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| 112 | <para os="y">Finally, move a misplaced file:</para>
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| 113 |
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| 114 | <screen os="z"><userinput>mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib</userinput></screen>
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| 115 |
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| 116 | </sect2>
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| 117 |
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| 118 | <sect2 id="contents-gcc" role="content">
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| 119 | <title>Contents of GCC</title>
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| 120 |
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| 121 | <segmentedlist>
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| 122 | <segtitle>Installed programs</segtitle>
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| 123 | <segtitle>Installed libraries</segtitle>
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| 124 | <segtitle>Installed directories</segtitle>
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| 125 |
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| 126 | <seglistitem>
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| 127 | <seg>c++, cc (link to gcc), cpp, g++, gcc, and gcov</seg>
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| 128 | <seg>libasan.[a,so], libgcc.a, libgcc_eh.a, libgcc_s.so, libgcov.a,
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| 129 | libgomp.[a,so], libmudflap.[a,so], libmudflapth.[a,so], libssp.[a,so],
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| 130 | libssp_nonshared.a, libstdc++.[a,so], libsupc++.a, and libtsan.[a,so]</seg>
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| 131 | <seg>/usr/include/c++, /usr/lib/gcc, /usr/share/gcc-&gcc-version;</seg>
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| 132 | </seglistitem>
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| 133 | </segmentedlist>
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| 134 |
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| 135 | <variablelist>
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| 136 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 137 | <?dbfo list-presentation="list"?>
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| 138 | <?dbhtml list-presentation="table"?>
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| 139 |
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| 140 | <varlistentry id="cc">
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| 141 | <term><command>cc</command></term>
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| 142 | <listitem>
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| 143 | <para>The C compiler</para>
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| 144 | <indexterm zone="ch-system-gcc cc">
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| 145 | <primary sortas="b-cc">cc</primary>
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| 146 | </indexterm>
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| 147 | </listitem>
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| 148 | </varlistentry>
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| 149 |
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| 150 | <varlistentry id="cpp">
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| 151 | <term><command>cpp</command></term>
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| 152 | <listitem>
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| 153 | <para>The C preprocessor; it is used by the compiler to expand the
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| 154 | #include, #define, and similar statements in the source files</para>
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| 155 | <indexterm zone="ch-system-gcc cpp">
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| 156 | <primary sortas="b-cpp">cpp</primary>
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| 157 | </indexterm>
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| 158 | </listitem>
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| 159 | </varlistentry>
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| 160 |
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| 161 | <varlistentry id="c">
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| 162 | <term><command>c++</command></term>
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| 163 | <listitem>
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| 164 | <para>The C++ compiler</para>
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| 165 | <indexterm zone="ch-system-gcc c">
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| 166 | <primary sortas="b-c++">c++</primary>
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| 167 | </indexterm>
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| 168 | </listitem>
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| 169 | </varlistentry>
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| 170 |
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| 171 | <varlistentry id="g">
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| 172 | <term><command>g++</command></term>
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| 173 | <listitem>
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| 174 | <para>The C++ compiler</para>
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| 175 | <indexterm zone="ch-system-gcc g">
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| 176 | <primary sortas="b-g++">g++</primary>
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| 177 | </indexterm>
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| 178 | </listitem>
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| 179 | </varlistentry>
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| 180 |
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| 181 | <varlistentry id="gcc">
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| 182 | <term><command>gcc</command></term>
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| 183 | <listitem>
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| 184 | <para>The C compiler</para>
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| 185 | <indexterm zone="ch-system-gcc gcc">
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| 186 | <primary sortas="b-gcc">gcc</primary>
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| 187 | </indexterm>
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| 188 | </listitem>
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| 189 | </varlistentry>
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| 190 |
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| 191 | <varlistentry id="gcov">
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| 192 | <term><command>gcov</command></term>
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| 193 | <listitem>
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| 194 | <para>A coverage testing tool; it is used to analyze programs to
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| 195 | determine where optimizations will have the most effect</para>
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| 196 | <indexterm zone="ch-system-gcc gcov">
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| 197 | <primary sortas="b-gcov">gcov</primary>
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| 198 | </indexterm>
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| 199 | </listitem>
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| 200 | </varlistentry>
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| 201 |
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| 202 | <varlistentry id="libasan">
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| 203 | <term><filename class="libraryfile">libasan</filename></term>
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| 204 | <listitem>
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| 205 | <para>The Address Sanitizer runtime library</para>
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| 206 | <indexterm zone="ch-system-gcc libasan">
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| 207 | <primary sortas="c-libasan">libasan</primary>
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| 208 | </indexterm>
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| 209 | </listitem>
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| 210 | </varlistentry>
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| 211 |
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| 212 | <varlistentry id="libgcc">
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| 213 | <term><filename class="libraryfile">libgcc</filename></term>
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| 214 | <listitem>
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| 215 | <para>Contains run-time support for <command>gcc</command></para>
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| 216 | <indexterm zone="ch-system-gcc libgcc">
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| 217 | <primary sortas="c-libgcc*">libgcc*</primary>
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| 218 | </indexterm>
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| 219 | </listitem>
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| 220 | </varlistentry>
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| 221 |
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| 222 | <varlistentry id="libgcov">
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| 223 | <term><filename class="libraryfile">libgcov</filename></term>
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| 224 | <listitem>
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| 225 | <para>Library that is linked into a program when
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| 226 | <command>gcc</command> is instructed to enable profiling</para>
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| 227 | <indexterm zone="ch-system-gcc libgcov">
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| 228 | <primary sortas="c-libgcov">libgcov</primary>
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| 229 | </indexterm>
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| 230 | </listitem>
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| 231 | </varlistentry>
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| 232 |
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| 233 | <varlistentry id="libgomp">
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| 234 | <term><filename class="libraryfile">libgomp</filename></term>
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| 235 | <listitem>
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| 236 | <para>GNU implementation of the OpenMP API for multi-platform
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| 237 | shared-memory parallel programming in C/C++ and Fortran</para>
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| 238 | <indexterm zone="ch-system-gcc libgomp">
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| 239 | <primary sortas="c-libgomp">libgomp</primary>
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| 240 | </indexterm>
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| 241 | </listitem>
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| 242 | </varlistentry>
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| 243 |
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| 244 | <varlistentry id="libmudflap">
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| 245 | <term><filename class="libraryfile">libmudflap</filename></term>
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| 246 | <listitem>
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| 247 | <para>The libmudflap libraries are used by GCC for instrumenting
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| 248 | pointer and array dereferencing operations.</para>
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| 249 | <indexterm zone="ch-system-gcc libmudflap">
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| 250 | <primary sortas="c-libmudflap*">libmudflap*</primary>
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| 251 | </indexterm>
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| 252 | </listitem>
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| 253 | </varlistentry>
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| 254 |
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| 255 | <varlistentry id="libssp">
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| 256 | <term><filename class="libraryfile">libssp</filename></term>
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| 257 | <listitem>
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| 258 | <para>Contains routines supporting GCC's stack-smashing protection
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| 259 | functionality</para>
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| 260 | <indexterm zone="ch-system-gcc libssp">
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| 261 | <primary sortas="c-libssp*">libssp*</primary>
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| 262 | </indexterm>
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| 263 | </listitem>
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| 264 | </varlistentry>
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| 265 |
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| 266 | <varlistentry id="libstdc">
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| 267 | <term><filename class="libraryfile">libstdc++</filename></term>
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| 268 | <listitem>
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| 269 | <para>The standard C++ library</para>
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| 270 | <indexterm zone="ch-system-gcc libstdc">
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| 271 | <primary sortas="c-libstdc++">libstdc++</primary>
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| 272 | </indexterm>
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| 273 | </listitem>
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| 274 | </varlistentry>
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| 275 |
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| 276 | <varlistentry id="libsupc">
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| 277 | <term><filename class="libraryfile">libsupc++</filename></term>
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| 278 | <listitem>
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| 279 | <para>Provides supporting routines for the C++ programming
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| 280 | language</para>
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| 281 | <indexterm zone="ch-system-gcc libsupc">
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| 282 | <primary sortas="c-libsupc++">libsupc++</primary>
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| 283 | </indexterm>
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| 284 | </listitem>
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| 285 | </varlistentry>
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| 286 |
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| 287 | <varlistentry id="libtsan">
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| 288 | <term><filename class="libraryfile">libtsan</filename></term>
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| 289 | <listitem>
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| 290 | <para>The Thread Sanitizer runtime library</para>
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| 291 | <indexterm zone="ch-system-gcc libtsan">
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| 292 | <primary sortas="c-libtsan">libtsan</primary>
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| 293 | </indexterm>
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| 294 | </listitem>
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| 295 | </varlistentry>
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| 296 |
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| 297 | </variablelist>
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| 298 |
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| 299 | </sect2>
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| 300 |
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| 301 | </sect1>
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