source: clfs-embedded/BOOK/cross-tools/common/gcc-static.xml@ eabbc52

Last change on this file since eabbc52 was f6137b6, checked in by Andrew Bradford <bradfa@…>, 14 years ago

Added --with-mpc to GCC's configure switches

With GCC 4.5, MPC is required in order to build.
Added the switch to ensure configure finds the right version of MPC
and not one located on the host.
  • Property mode set to 100644
File size: 8.1 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-cross-tools-gcc-static" role="wrap">
9 <?dbhtml filename="gcc-static.html"?>
10
11 <title>Cross GCC-&gcc-version; - Static</title>
12
13 <indexterm zone="ch-cross-tools-gcc-static">
14 <primary sortas="a-GCC">GCC</primary>
15 <secondary>cross tools, static</secondary>
16 </indexterm>
17
18 <sect2 role="package">
19 <title/>
20
21 <para>The GCC package contains the GNU compiler collection, which includes
22 the C and C++ compilers.</para>
23
24 </sect2>
25
26 <sect2 role="installation">
27 <title>Installation of Cross GCC Compiler with Static libgcc
28 and no Threads</title>
29
30 <para os="c">The GCC documentation recommends building GCC outside of the source
31 directory in a dedicated build directory:</para>
32
33<screen os="d"><userinput>mkdir -v ../gcc-build
34cd ../gcc-build</userinput></screen>
35
36 <para os="e">Prepare GCC for compilation:</para>
37
38<screen os="ae"><userinput>AR=ar LDFLAGS="-Wl,-rpath,${CLFS}/cross-tools/lib" \
39 ../gcc-&gcc-version;/configure --prefix=${CLFS}/cross-tools \
40 --build=${CLFS_HOST} --host=${CLFS_HOST} --target=${CLFS_TARGET} \
41 --with-sysroot=${CLFS} --disable-nls --disable-shared \
42 --with-mpfr=${CLFS}/cross-tools --with-gmp=${CLFS}/cross-tools \
43 --with-mpc=${CLFS}/cross-tools --without-headers --with-newlib \
44 --disable-decimal-float --disable-libgomp --disable-libmudflap \
45 --disable-libssp --disable-threads --enable-languages=c</userinput></screen>
46
47 <variablelist os="af">
48 <title>The meaning of the configure options:</title>
49
50 <varlistentry os="af1">
51 <term><parameter>--prefix=${CLFS}/cross-tools</parameter></term>
52 <listitem>
53 <para>This tells the configure script to prepare to install the
54 package in the <filename class="directory">${CLFS}/cross-tools</filename>
55 directory.</para>
56 </listitem>
57 </varlistentry>
58
59 <varlistentry os="af2">
60 <term><parameter>--build=${CLFS_HOST}</parameter></term>
61 <listitem>
62 <para>This tells the configure script the triplet to use to build GCC.
63 It will use ${CLFS_HOST} as that's where it's being built.</para>
64 </listitem>
65 </varlistentry>
66
67 <varlistentry os="af3">
68 <term><parameter>--host=${CLFS_HOST}</parameter></term>
69 <listitem>
70 <para>This tells the configure script the triplet of the machine GCC
71 will be executed on when actually cross compiling. It will use
72 ${CLFS_HOST} as that's where GCC will execute when cross compiling
73 software later.</para>
74 </listitem>
75 </varlistentry>
76
77 <varlistentry os="af4">
78 <term><parameter>--target=${CLFS_TARGET}</parameter></term>
79 <listitem>
80 <para>This tells the configure script the triplet of the machine GCC
81 will build executables for. It will use ${CLFS_TARGET} so that software
82 compiled with this version of GCC can be executed on the embedded machine
83 target.</para>
84 </listitem>
85 </varlistentry>
86
87 <varlistentry os="af5">
88 <term><parameter>--with-sysroot=${CLFS}</parameter></term>
89 <listitem>
90 <para>This tells configure that ${CLFS} is going to be the root
91 of our system. It will now use the specified sysroot, ${CLFS}, as
92 a prefix of the default search paths.</para>
93 </listitem>
94 </varlistentry>
95
96 <varlistentry os="af6">
97 <term><parameter>--disable-nls</parameter></term>
98 <listitem>
99 <para>This disables internationalization as i18n is not needed for the
100 cross-compile tools.</para>
101 </listitem>
102 </varlistentry>
103
104 <varlistentry os="af7">
105 <term><parameter>--disable-shared</parameter></term>
106 <listitem>
107 <para>Disables the creation of the shared libraries.</para>
108 </listitem>
109 </varlistentry>
110
111 <varlistentry os="af8">
112 <term><parameter>--with-mpfr=${CLFS}/cross-tools</parameter></term>
113 <listitem>
114 <para>Tells configure where to find the
115 <filename class="directory">lib</filename> and
116 <filename class="directory">include</filename> directories
117 that contain MPFR which was built earlier.</para>
118 </listitem>
119 </varlistentry>
120
121 <varlistentry os="af9">
122 <term><parameter>--with-gmp=${CLFS}/cross-tools</parameter></term>
123 <listitem>
124 <para>Tells configure where to find the
125 <filename class="directory">lib</filename> and
126 <filename class="directory">include</filename> directories
127 that contain GMP which was built earlier.</para>
128 </listitem>
129 </varlistentry>
130
131 <varlistentry os="af10">
132 <term><parameter>--with-mpc=${CLFS}/cross-tools</parameter></term>
133 <listitem>
134 <para>Tells configure where to find the
135 <filename class="directory">lib</filename> and
136 <filename class="directory">include</filename> directories
137 that contain MPC which was built earlier.</para>
138 </listitem>
139 </varlistentry>
140
141 <varlistentry os="af11">
142 <term><parameter>--without-headers</parameter></term>
143 <listitem>
144 <para>Tells configure to not use any headers from any C libraries.
145 This is needed as we haven't yet built the C library and to prevent
146 influence from the host environment.</para>
147 </listitem>
148 </varlistentry>
149
150 <varlistentry os="af12">
151 <term><parameter>--with-newlib</parameter></term>
152 <listitem>
153 <para>Tells configure to build libgcc without needing any C
154 libraries.</para>
155 </listitem>
156 </varlistentry>
157
158 <varlistentry os="af13">
159 <term><parameter>--disable-decimal-float</parameter></term>
160 <listitem>
161 <para>Tells configure to disable IEEE 754-2008 decimal floating
162 point support. Decimal floating point support isn't needed yet.</para>
163 </listitem>
164 </varlistentry>
165
166 <varlistentry os="af14">
167 <term><parameter>--disable-libgomp</parameter></term>
168 <listitem>
169 <para>Tells configure to not build the GOMP run-time libraries.
170 GOMP is the GNU implementation of OpenMP, a API for shared-memory
171 parallel programming.</para>
172 </listitem>
173 </varlistentry>
174
175 <varlistentry os="af15">
176 <term><parameter>--disable-libmudflap</parameter></term>
177 <listitem>
178 <para>Tells configure to not build libmudflap. Mudflap is a
179 library that can be used to help check for proper pointer usage.</para>
180 </listitem>
181 </varlistentry>
182
183 <varlistentry os="af16">
184 <term><parameter>--disable-libssp</parameter></term>
185 <listitem>
186 <para>Tells configure not to build run-time libraries for stack
187 smashing detection.</para>
188 </listitem>
189 </varlistentry>
190
191 <varlistentry os="af17">
192 <term><parameter>--disable-threads</parameter></term>
193 <listitem>
194 <para>This will prevent GCC from looking for the multi-thread
195 include files, since they haven't been created for this architecture
196 yet. GCC will be able to find the multi-thread information after
197 the glib headers are created.</para>
198 </listitem>
199 </varlistentry>
200
201 <varlistentry os="af18">
202 <term><parameter>--enable-languages=c</parameter></term>
203 <listitem>
204 <para>This option ensures that only the C compiler is built.</para>
205 </listitem>
206 </varlistentry>
207
208 </variablelist>
209
210 <para os="ag">Continue with compiling the package:</para>
211
212<screen os="ah"><userinput>make all-gcc all-target-libgcc</userinput></screen>
213
214 <para os="ai">Install the package:</para>
215
216<screen os="aj"><userinput>make install-gcc install-target-libgcc</userinput></screen>
217
218 </sect2>
219
220 <sect2 role="content">
221 <title/>
222
223 <para>Details on this package are located in <xref
224 linkend="contents-gcc" role="."/></para>
225
226 </sect2>
227
228</sect1>
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