source: clfs-embedded/BOOK/cross-tools/common/gcc-static.xml @ b128a0e

Last change on this file since b128a0e was b128a0e, checked in by Andrew Bradford <bradfa@…>, 13 years ago

Added identifier comment to common/gcc-static.xml

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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<!-- Common GCC-Static -->
9
10<sect1 id="ch-cross-tools-gcc-static" role="wrap">
11  <?dbhtml filename="gcc-static.html"?>
12
13  <title>Cross GCC-&gcc-version; - Static</title>
14
15  <indexterm zone="ch-cross-tools-gcc-static">
16    <primary sortas="a-GCC">GCC</primary>
17    <secondary>cross tools, static</secondary>
18  </indexterm>
19
20  <sect2 role="package">
21    <title/>
22
23    <para>The GCC package contains the GNU compiler collection, which includes
24    the C and C++ compilers.</para>
25
26  </sect2>
27
28  <sect2 role="installation">
29    <title os="a">Installation of Cross GCC Compiler with Static libgcc
30    and no Threads</title>
31
32    <para os="c">The GCC documentation recommends building GCC outside of the source
33    directory in a dedicated build directory:</para>
34
35<screen os="d"><userinput>mkdir -v ../gcc-build
36cd ../gcc-build</userinput></screen>
37
38    <para os="e">Prepare GCC for compilation:</para>
39
40<!-- This is the common configure line for GCC-Static. -->
41<!-- It's not actually used by any arch but is here for reference. -->
42<screen os="ae"><userinput>AR=ar LDFLAGS="-Wl,-rpath,${CLFS}/cross-tools/lib" \
43  ../gcc-&gcc-version;/configure --prefix=${CLFS}/cross-tools \
44  --build=${CLFS_HOST} --host=${CLFS_HOST} --target=${CLFS_TARGET} \
45  --with-sysroot=${CLFS} --disable-nls  --disable-shared \
46  --with-mpfr=${CLFS}/cross-tools --with-gmp=${CLFS}/cross-tools \
47  --with-mpc=${CLFS}/cross-tools --without-headers --with-newlib \
48  --disable-decimal-float --disable-libgomp --disable-libmudflap \
49  --disable-libssp --disable-threads --enable-languages=c</userinput></screen>
50
51    <variablelist os="af">
52      <title>The meaning of the configure options:</title>
53
54      <varlistentry os="af1">
55        <term><parameter>--prefix=${CLFS}/cross-tools</parameter></term>
56        <listitem>
57          <para>This tells the configure script to prepare to install the
58          package in the <filename class="directory">${CLFS}/cross-tools</filename>
59          directory.</para>
60        </listitem>
61      </varlistentry>
62
63      <varlistentry os="af2">
64        <term><parameter>--build=${CLFS_HOST}</parameter></term>
65        <listitem>
66          <para>This tells the configure script the triplet to use to build GCC.
67          It will use ${CLFS_HOST} as that's where it's being built.</para>
68        </listitem>
69      </varlistentry>
70
71      <varlistentry os="af3">
72        <term><parameter>--host=${CLFS_HOST}</parameter></term>
73        <listitem>
74          <para>This tells the configure script the triplet of the machine GCC
75          will be executed on when actually cross compiling.  It will use
76          ${CLFS_HOST} as that's where GCC will execute when cross compiling
77          software later.</para>
78        </listitem>
79      </varlistentry>
80
81      <varlistentry os="af4">
82        <term><parameter>--target=${CLFS_TARGET}</parameter></term>
83        <listitem>
84          <para>This tells the configure script the triplet of the machine GCC
85          will build executables for.  It will use ${CLFS_TARGET} so that software
86          compiled with this version of GCC can be executed on the embedded machine
87          target.</para>
88        </listitem>
89      </varlistentry>
90
91      <varlistentry os="af5">
92        <term><parameter>--with-sysroot=${CLFS}</parameter></term>
93        <listitem>
94          <para>This tells configure that ${CLFS} is going to be the root
95          of our system. It will now use the specified sysroot, ${CLFS}, as
96          a prefix of the default search paths.</para>
97        </listitem>
98      </varlistentry>
99
100      <varlistentry os="af6">
101        <term><parameter>--disable-nls</parameter></term>
102        <listitem>
103          <para>This disables internationalization as i18n is not needed for the
104          cross-compile tools.</para>
105        </listitem>
106      </varlistentry>
107
108      <varlistentry os="af7">
109        <term><parameter>--disable-shared</parameter></term>
110        <listitem>
111          <para>Disables the creation of the shared libraries.</para>
112        </listitem>
113      </varlistentry>
114
115      <varlistentry os="af8">
116        <term><parameter>--with-mpfr=${CLFS}/cross-tools</parameter></term>
117        <listitem>
118          <para>Tells configure where to find the
119          <filename class="directory">lib</filename> and
120          <filename class="directory">include</filename> directories
121          that contain MPFR which was built earlier.</para>
122        </listitem>
123      </varlistentry>
124
125      <varlistentry os="af9">
126        <term><parameter>--with-gmp=${CLFS}/cross-tools</parameter></term>
127        <listitem>
128          <para>Tells configure where to find the
129          <filename class="directory">lib</filename> and
130          <filename class="directory">include</filename> directories
131          that contain GMP which was built earlier.</para>
132        </listitem>
133      </varlistentry>
134
135      <varlistentry os="af10">
136        <term><parameter>--with-mpc=${CLFS}/cross-tools</parameter></term>
137        <listitem>
138          <para>Tells configure where to find the
139          <filename class="directory">lib</filename> and
140          <filename class="directory">include</filename> directories
141          that contain MPC which was built earlier.</para>
142        </listitem>
143      </varlistentry>
144
145      <varlistentry os="af11">
146        <term><parameter>--without-headers</parameter></term>
147        <listitem>
148          <para>Tells configure to not use any headers from any C libraries.
149          This is needed as we haven't yet built the C library and to prevent
150          influence from the host environment.</para>
151        </listitem>
152      </varlistentry>
153
154      <varlistentry os="af12">
155        <term><parameter>--with-newlib</parameter></term>
156        <listitem>
157          <para>Tells configure to build libgcc without needing any C
158          libraries.</para>
159        </listitem>
160      </varlistentry>
161
162      <varlistentry os="af13">
163        <term><parameter>--disable-decimal-float</parameter></term>
164        <listitem>
165          <para>Tells configure to disable IEEE 754-2008 decimal floating
166          point support.  Decimal floating point support isn't needed yet.</para>
167        </listitem>
168      </varlistentry>
169
170      <varlistentry os="af14">
171        <term><parameter>--disable-libgomp</parameter></term>
172        <listitem>
173          <para>Tells configure to not build the GOMP run-time libraries.
174          GOMP is the GNU implementation of OpenMP, a API for shared-memory
175          parallel programming.</para>
176        </listitem>
177      </varlistentry>
178
179      <varlistentry os="af15">
180        <term><parameter>--disable-libmudflap</parameter></term>
181        <listitem>
182          <para>Tells configure to not build libmudflap.  Mudflap is a
183          library that can be used to help check for proper pointer usage.</para>
184        </listitem>
185      </varlistentry>
186
187      <varlistentry os="af16">
188        <term><parameter>--disable-libssp</parameter></term>
189        <listitem>
190          <para>Tells configure not to build run-time libraries for stack
191          smashing detection.</para>
192        </listitem>
193      </varlistentry>
194
195      <varlistentry os="af17">
196        <term><parameter>--disable-threads</parameter></term>
197        <listitem>
198          <para>This will prevent GCC from looking for the multi-thread
199          include files, since they haven't been created for this architecture
200          yet. GCC will be able to find the multi-thread information after
201          the glib headers are created.</para>
202        </listitem>
203      </varlistentry>
204
205      <varlistentry os="af18">
206        <term><parameter>--enable-languages=c</parameter></term>
207        <listitem>
208          <para>This option ensures that only the C compiler is built.</para>
209        </listitem>
210      </varlistentry>
211
212    </variablelist>
213
214    <para os="ah">Continue with compiling the package:</para>
215
216<screen os="ai"><userinput>make all-gcc all-target-libgcc</userinput></screen>
217
218    <para os="aj">Install the package:</para>
219
220<screen os="ak"><userinput>make install-gcc install-target-libgcc</userinput></screen>
221
222  </sect2>
223
224  <sect2 role="content">
225    <title/>
226
227    <para>Details on this package are located in <xref
228    linkend="contents-gcc" role="."/></para>
229
230  </sect2>
231
232</sect1>
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