source: BOOK/cross-tools/common/gcc-static.xml @ 22cf824

clfs-3.0.0-sysvinitsysvinit
Last change on this file since 22cf824 was 22cf824, checked in by Chris Staub <chris@…>, 8 years ago

Added command explanation for --build

  • Property mode set to 100644
File size: 8.5 KB
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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<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  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
19  href="../../final-system/common/gcc.xml"
20  xpointer="xpointer(//*[@role='package'])"/>
21
22  <sect2 role="installation">
23    <title>Installation of Cross GCC Compiler with Static libgcc
24    and no Threads</title>
25
26    <para os="e">Here we will compile GCC, as a cross-compiler that will create
27    executables for our target architecture, statically so that it will not
28    need to look for Glibc's startfiles, which do not yet exist in
29    <filename class="directory">/tools</filename>. We will use this
30    cross-compiler, plus the cross-linker we have just installed with Binutils,
31    to compile Glibc. After Glibc is installed into
32    <filename class="directory">/tools</filename>, we can rebuild GCC
33    so that it will then be able to build executables that link against the
34    libraries in <filename class="directory">/tools</filename>.</para>
35
36    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
37    href="../../final-system/common/gcc.xml"
38    xpointer="xpointer(//*[@os='p1'])"/>
39
40    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
41    href="../../final-system/common/gcc.xml"
42    xpointer="xpointer(//*[@os='p2'])"/>
43
44    <para os="aa">Make a couple of essential adjustments to GCC's specs
45    to ensure GCC uses our build environment:</para>
46
47<screen os="ab"><userinput>patch -Np1 -i ../&gcc-specs-patch;</userinput></screen>
48
49    <para os="ag">Change the StartFile Spec so that GCC looks in
50<filename class="directory">/tools</filename>:</para>
51
52<screen os="ah"><userinput>echo -en '\n#undef STANDARD_STARTFILE_PREFIX_1\n#define STANDARD_STARTFILE_PREFIX_1 "/tools/lib/"\n' &gt;&gt; gcc/config/linux.h
53echo -en '\n#undef STANDARD_STARTFILE_PREFIX_2\n#define STANDARD_STARTFILE_PREFIX_2 ""\n' &gt;&gt; gcc/config/linux.h</userinput></screen>
54
55    <para os="t1">We will create a dummy <filename>limits.h</filename> so
56    the build will not use the one provided by the host distro:</para>
57
58<screen os="t2"><userinput>touch /tools/include/limits.h</userinput></screen>
59
60    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
61    href="../../final-system/common/gcc.xml"
62    xpointer="xpointer(//*[@os='f'])"/>
63
64    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
65    href="../../final-system/common/gcc.xml"
66    xpointer="xpointer(//*[@os='g'])"/>
67
68    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
69    href="../../final-system/common/gcc.xml"
70    xpointer="xpointer(//*[@os='h'])"/>
71
72<screen os="al"><userinput>AR=ar LDFLAGS="-Wl,-rpath,/cross-tools/lib" \
73    ../gcc-&gcc-version;/configure --prefix=/cross-tools \
74    --build=${CLFS_HOST} --host=${CLFS_HOST} --target=${CLFS_TARGET} \
75    --with-sysroot=${CLFS} --with-local-prefix=/tools \
76    --with-native-system-header-dir=/tools/include --disable-nls \
77    --disable-shared --with-mpfr=/cross-tools --with-gmp=/cross-tools \
78    --with-isl=/cross-tools --with-cloog=/cross-tools --with-mpc=/cross-tools \
79    --without-headers --with-newlib --disable-decimal-float --disable-libgomp \
80    --disable-libmudflap --disable-libssp --disable-libatomic --disable-libitm \
81    --disable-libsanitizer --disable-libquadmath --disable-threads \
82    --disable-multilib --disable-target-zlib --with-system-zlib \
83    --enable-languages=c --enable-checking=release</userinput></screen>
84
85    <variablelist os="am">
86      <title>The meaning of the new configure options:</title>
87
88      <varlistentry>
89        <term><parameter>--build</parameter></term>
90        <listitem>
91          <para>This specifies the system on which the cross-compiler is being
92          built.</para>
93        </listitem>
94      </varlistentry>
95
96      <varlistentry>
97        <term><parameter>--with-local-prefix=/tools</parameter></term>
98        <listitem>
99          <para>The purpose of this switch is to remove <filename
100          class="directory">/usr/local/include</filename> from
101          <command>gcc</command>'s include search path. This is not
102          absolutely essential, however, it helps to minimize the
103          influence of the host system.</para>
104        </listitem>
105      </varlistentry>
106
107      <varlistentry>
108        <term><parameter>--with-native-system-headers-dir=/tools/include</parameter></term>
109        <listitem>
110          <para>This switch ensures that GCC will search for the system headers
111           in <filename class="directory">/tools/include</filename> and that
112           host system headers will not be searched.</para>
113        </listitem>
114      </varlistentry>
115
116      <varlistentry>
117        <term><parameter>--disable-shared</parameter></term>
118        <listitem>
119          <para>This tells GCC not to create a shared library.</para>
120        </listitem>
121      </varlistentry>
122
123      <varlistentry>
124        <term><parameter>--without-headers</parameter></term>
125        <listitem>
126          <para>Disables GCC from using the target's Libc when cross compiling.</para>
127        </listitem>
128      </varlistentry>
129
130      <varlistentry>
131        <term><parameter>--with-newlib</parameter></term>
132        <listitem>
133          <para>This causes GCC to enable the <envar>inhibit_libc</envar> flag,
134          which prevents <filename class="libraryfile">libgcc</filename>
135          from building code that uses libc support.</para>
136        </listitem>
137      </varlistentry>
138
139      <varlistentry>
140        <term><parameter>--disable-decimal-float</parameter></term>
141        <listitem>
142          <para>Disables support for the C decimal floating point extension.</para>
143        </listitem>
144      </varlistentry>
145
146      <varlistentry>
147        <term><parameter>--disable-lib*</parameter></term>
148        <listitem>
149          <para>These options prevent GCC from building a number of libraries
150          that are not needed at this time.</para>
151        </listitem>
152      </varlistentry>
153
154      <varlistentry>
155        <term><parameter>--disable-threads</parameter></term>
156        <listitem>
157          <para>This will prevent GCC from looking for the multi-thread
158          include files, since they haven't been created for this architecture
159          yet. GCC will be able to find the multi-thread information after
160          the Glibc headers are created.</para>
161        </listitem>
162      </varlistentry>
163
164      <varlistentry>
165        <term><parameter>--disable-target-zlib</parameter></term>
166        <listitem>
167          <para>This tells GCC not to build the copy of Zlib in its
168          source tree.</para>
169        </listitem>
170      </varlistentry>
171
172      <varlistentry>
173        <term><parameter>--with-system-zlib</parameter></term>
174        <listitem>
175          <para>This tells GCC to link to the system-installed zlib instead
176          of the one in its source tree.</para>
177        </listitem>
178      </varlistentry>
179
180      <varlistentry>
181        <term><parameter>--enable-languages=c</parameter></term>
182        <listitem>
183          <para>This option ensures that only the C compiler is built.</para>
184        </listitem>
185      </varlistentry>
186
187      <varlistentry>
188        <term><parameter>--enable-checking=release</parameter></term>
189        <listitem>
190          <para>This option selects the complexity of the internal consistency checks and adds error checking within the compiler.</para>
191        </listitem>
192      </varlistentry>
193
194    </variablelist>
195
196    <para os="an">Continue with compiling the package:</para>
197
198<screen os="ao"><userinput>make all-gcc all-target-libgcc</userinput></screen>
199
200    <variablelist os="ap">
201      <title>The meaning of the new make options:</title>
202
203      <varlistentry>
204        <term><parameter>all-gcc all-target-libgcc</parameter></term>
205        <listitem>
206          <para>Compiles only the parts of GCC that are needed at this time,
207          rather than the full package.</para>
208        </listitem>
209      </varlistentry>
210
211    </variablelist>
212
213    <para os="aq">Install the package:</para>
214
215<screen os="ar"><userinput>make install-gcc install-target-libgcc</userinput></screen>
216
217  </sect2>
218
219  <sect2 role="content">
220    <title/>
221
222    <para>Details on this package are located in <xref
223    linkend="contents-gcc" role="."/></para>
224
225  </sect2>
226
227</sect1>
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