source: clfs-sysroot/BOOK/final-system/common/gcc.xml @ c439b8a

Last change on this file since c439b8a was c439b8a, checked in by Manuel Canales Esparcia <manuel@…>, 17 years ago

Updated CLFS-Sysroot book sources to use DocBook?-XML DTD 4.5.

  • Property mode set to 100644
File size: 8.5 KB
Line 
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4  <!ENTITY % general-entities SYSTEM "../../general.ent">
5  %general-entities;
6]>
7
8<sect1 id="ch-system-gcc" role="wrap">
9  <?dbhtml filename="gcc.html"?>
10
11  <title>GCC-&gcc-version;</title>
12
13  <indexterm zone="ch-system-gcc">
14    <primary sortas="a-GCC">GCC</primary>
15  </indexterm>
16
17  <sect2 role="package">
18    <title/>
19
20    <para>The GCC package contains the GNU compiler collection, which includes
21    the C and C++ compilers.</para>
22
23  </sect2>
24
25  <sect2 role="installation">
26    <title>Installation of GCC</title>
27
28    <para os="p1">To make sure that a couple of tools use the proper syntax,
29    apply the following patch:</para>
30
31<screen os="p2"><userinput>patch -Np1 -i ../&gcc-posix-patch;</userinput></screen>
32
33    <para os="p3">The following patch fixes the searching of multilib dirs
34    for specs file. The patch standardizes the gcc drivers path iteration
35    functions, ensuring multilib directories are searched in the correct
36    order. This fixes various issues, most noticably with libtool on
37    multilib systems:</para>
38
39<screen os="p4"><userinput>patch -Np1 -i ../&gcc-PR20425-patch;</userinput></screen>
40
41    <para os="a">Apply a <command>sed</command> substitution that will suppress the
42    installation of <filename class="libraryfile">libiberty.a</filename>. The
43    version of <filename class="libraryfile">libiberty.a</filename> provided by
44    Binutils will be used instead:</para>
45
46<screen os="b"><userinput>cp libiberty/Makefile.in{,.orig}
47sed 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in.orig > libiberty/Makefile.in</userinput></screen>
48
49    <para os="e1">GCC provides a <command>gccbug</command> script which detects at
50    compile time whether mktemp is present, and hardcodes the result in a test.
51    If mktemp is not found, the script will fall back to using less
52    random names for temporary files.  We will be installing mktemp
53    later, so the following sed will simulate its presence:</para>
54
55<screen os="e2"><userinput>cp gcc/gccbug.in{,.orig}
56sed 's/@have_mktemp_command@/yes/' gcc/gccbug.in.orig > gcc/gccbug.in</userinput></screen>
57
58    <para os="s1">The fixincludes attempts to "fix" the system headers
59    installed so far. Since gcc is cross-compiled expecting the system
60    headers to be in <filename class="directory">/usr/include</filename>
61    the script will be looking at host headers. The following sed prevents
62    the fixincludes script from running:</para>
63
64<screen os="s2"><userinput>cp gcc/Makefile.in{,.orig}
65sed 's@\./fixinc\.sh@-c true@' gcc/Makefile.in.orig > gcc/Makefile.in</userinput></screen>
66
67    <para os="c">The GCC documentation recommends building GCC outside of the source
68    directory in a dedicated build directory:</para>
69
70<screen os="d"><userinput>mkdir -v ../gcc-build
71cd ../gcc-build</userinput></screen>
72
73    <para os="e">Prepare GCC for compilation:</para>
74
75<screen os="f"><userinput>../gcc-&gcc-version;/configure --prefix=/usr --libexecdir=/usr/lib \
76    --build=${CLFS_HOST} --host=${CLFS_TARGET} --target=${CLFS_TARGET} \
77    --enable-shared --enable-threads=posix --enable-__cxa_atexit \
78    --enable-c99 --enable-long-long --enable-clocale=gnu \
79    --enable-languages=c,c++ --disable-libstdcxx-pch</userinput></screen>
80
81    <para os="g">Compile the package:</para>
82
83<screen os="h"><userinput>make</userinput></screen>
84
85    <para os="i">Install the package:</para>
86
87<screen os="j"><userinput>make DESTDIR=${CLFS} install</userinput></screen>
88
89    <para os="k">Some packages expect the C preprocessor to be installed in the
90    <filename class="directory">/lib</filename> directory.
91    To support those packages, create this symlink:</para>
92
93<screen os="l"><userinput>ln -sfv ../usr/bin/cpp ${CLFS}/lib</userinput></screen>
94
95    <para os="m">Many packages use the name <command>cc</command> to call the C
96    compiler. To satisfy those packages, create a symlink:</para>
97
98<screen os="o"><userinput>ln -sfv gcc ${CLFS}/usr/bin/cc</userinput></screen>
99
100  </sect2>
101
102  <sect2 id="contents-gcc" role="content">
103    <title>Contents of GCC</title>
104
105    <segmentedlist>
106      <segtitle>Installed programs</segtitle>
107      <segtitle>Installed libraries</segtitle>
108
109      <seglistitem>
110        <seg>c++, cc (link to gcc), cpp, g++, gcc, gccbug, and gcov</seg>
111        <seg>libgcc.a, libgcc_eh.a, libgcc_s.so, libmudflap.[a,so],
112        libmudflapth.[a,so], libstdc++.[a,so], and
113        libsupc++.a</seg>
114      </seglistitem>
115    </segmentedlist>
116
117    <variablelist>
118      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
119      <?dbfo list-presentation="list"?>
120      <?dbhtml list-presentation="table"?>
121
122      <varlistentry id="cc">
123        <term><command>cc</command></term>
124        <listitem>
125          <para>The C compiler</para>
126          <indexterm zone="ch-system-gcc cc">
127            <primary sortas="b-cc">cc</primary>
128          </indexterm>
129        </listitem>
130      </varlistentry>
131
132      <varlistentry id="cpp">
133        <term><command>cpp</command></term>
134        <listitem>
135          <para>The C preprocessor; it is used by the compiler to expand the
136          #include, #define, and similar statements in the source files</para>
137          <indexterm zone="ch-system-gcc cpp">
138            <primary sortas="b-cpp">cpp</primary>
139          </indexterm>
140        </listitem>
141      </varlistentry>
142
143      <varlistentry id="c">
144        <term><command>c++</command></term>
145        <listitem>
146          <para>The C++ compiler</para>
147          <indexterm zone="ch-system-gcc c">
148            <primary sortas="b-c++">c++</primary>
149          </indexterm>
150        </listitem>
151      </varlistentry>
152
153      <varlistentry id="g">
154        <term><command>g++</command></term>
155        <listitem>
156          <para>The C++ compiler</para>
157          <indexterm zone="ch-system-gcc g">
158            <primary sortas="b-g++">g++</primary>
159          </indexterm>
160        </listitem>
161      </varlistentry>
162
163      <varlistentry id="gcc">
164        <term><command>gcc</command></term>
165        <listitem>
166          <para>The C compiler</para>
167          <indexterm zone="ch-system-gcc gcc">
168            <primary sortas="b-gcc">gcc</primary>
169          </indexterm>
170        </listitem>
171      </varlistentry>
172
173      <varlistentry id="gccbug">
174        <term><command>gccbug</command></term>
175        <listitem>
176          <para>A shell script used to help create useful bug reports</para>
177          <indexterm zone="ch-system-gcc gccbug">
178            <primary sortas="b-gccbug">gccbug</primary>
179          </indexterm>
180        </listitem>
181      </varlistentry>
182
183      <varlistentry id="gcov">
184        <term><command>gcov</command></term>
185        <listitem>
186          <para>A coverage testing tool; it is used to analyze programs to
187          determine where optimizations will have the most effect</para>
188          <indexterm zone="ch-system-gcc gcov">
189            <primary sortas="b-gcov">gcov</primary>
190          </indexterm>
191        </listitem>
192      </varlistentry>
193
194      <varlistentry id="libgcc">
195        <term><filename class="libraryfile">libgcc</filename></term>
196        <listitem>
197          <para>Contains run-time support for <command>gcc</command></para>
198          <indexterm zone="ch-system-gcc libgcc">
199            <primary sortas="c-libgcc*">libgcc*</primary>
200          </indexterm>
201        </listitem>
202      </varlistentry>
203
204      <varlistentry id="libmudflap">
205        <term><filename class="libraryfile">libmudflap</filename></term>
206        <listitem>
207          <para>The libmudflap libraries are used by GCC for instrumenting
208          pointer and array dereferencing operations.</para>
209          <indexterm zone="ch-system-gcc libmudflap">
210            <primary sortas="c-libmudflap*">libmudflap*</primary>
211          </indexterm>
212        </listitem>
213      </varlistentry>
214
215      <varlistentry id="libstdc">
216        <term><filename class="libraryfile">libstdc++</filename></term>
217        <listitem>
218          <para>The standard C++ library</para>
219          <indexterm zone="ch-system-gcc libstdc">
220            <primary sortas="c-libstdc++">libstdc++</primary>
221          </indexterm>
222        </listitem>
223      </varlistentry>
224
225      <varlistentry id="libsupc">
226        <term><filename class="libraryfile">libsupc++</filename></term>
227        <listitem>
228          <para>Provides supporting routines for the C++ programming
229          language</para>
230          <indexterm zone="ch-system-gcc libsupc">
231            <primary sortas="c-libsupc++">libsupc++</primary>
232          </indexterm>
233        </listitem>
234      </varlistentry>
235
236    </variablelist>
237
238  </sect2>
239
240</sect1>
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