source: BOOK/cross-tools/common/gcc-static.xml @ a55f9e7

sysvinit
Last change on this file since a55f9e7 was a55f9e7, checked in by William Harrington <kb0iic@…>, 8 years ago

Upgrade GCC from 5.2.0 to 5.3.0.

  • Property mode set to 100644
File size: 8.4 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  <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<!--GCC Branch Update Area
37    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
38    href="../../final-system/common/gcc.xml"
39    xpointer="xpointer(//*[@os='p1'])"/>
40
41    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
42    href="../../final-system/common/gcc.xml"
43    xpointer="xpointer(//*[@os='p2'])"/>
44-->
45
46    <para os="aa">Make a couple of essential adjustments to GCC's specs
47    to ensure GCC uses our build environment:</para>
48
49<screen os="ab"><userinput>patch -Np1 -i ../&gcc-specs-patch;</userinput></screen>
50
51    <para os="ag">Change the StartFile Spec so that GCC looks in
52<filename class="directory">/tools</filename>:</para>
53
54<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
55echo -en '\n#undef STANDARD_STARTFILE_PREFIX_2\n#define STANDARD_STARTFILE_PREFIX_2 ""\n' &gt;&gt; gcc/config/linux.h</userinput></screen>
56
57    <para os="t1">We will create a dummy <filename>limits.h</filename> so
58    the build will not use the one provided by the host distro:</para>
59
60<screen os="t2"><userinput>touch /tools/include/limits.h</userinput></screen>
61
62    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
63    href="../../final-system/common/gcc.xml"
64    xpointer="xpointer(//*[@os='f'])"/>
65
66    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
67    href="../../final-system/common/gcc.xml"
68    xpointer="xpointer(//*[@os='g'])"/>
69
70    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
71    href="../../final-system/common/gcc.xml"
72    xpointer="xpointer(//*[@os='h'])"/>
73
74<screen os="al"><userinput>AR=ar \
75LDFLAGS="-Wl,-rpath,/cross-tools/lib" \
76../gcc-&gcc-version;/configure \
77    --prefix=/cross-tools \
78    --build=${CLFS_HOST} \
79    --host=${CLFS_HOST} \
80    --target=${CLFS_TARGET} \
81    --with-sysroot=${CLFS} \
82    --with-local-prefix=/tools \
83    --with-native-system-header-dir=/tools/include \
84    --disable-shared \
85    --with-mpfr=/cross-tools \
86    --with-gmp=/cross-tools \
87    --with-isl=/cross-tools \
88    --with-mpc=/cross-tools \
89    --without-headers \
90    --with-newlib \
91    --disable-decimal-float \
92    --disable-libgomp \
93    --disable-libssp \
94    --disable-libatomic \
95    --disable-libitm \
96    --disable-libsanitizer \
97    --disable-libquadmath \
98    --disable-libvtv \
99    --disable-libcilkrts \
100    --disable-libstdc++-v3 \
101    --disable-threads \
102    --disable-multilib \
103    --with-system-zlib \
104    --enable-languages=c \
105    --with-glibc-version=&glibc-version;</userinput></screen>
106
107    <variablelist os="am">
108      <title>The meaning of the new configure options:</title>
109
110      <varlistentry>
111        <term><parameter>--build=${CLFS_HOST}</parameter></term>
112        <listitem>
113          <para>This specifies the system on which the cross-compiler is being
114          built.</para>
115        </listitem>
116      </varlistentry>
117
118      <varlistentry>
119        <term><parameter>--with-local-prefix=/tools</parameter></term>
120        <listitem>
121          <para>The purpose of this switch is to remove <filename
122          class="directory">/usr/local/include</filename> from
123          <command>gcc</command>'s include search path. This is not
124          absolutely essential, however, it helps to minimize the
125          influence of the host system.</para>
126        </listitem>
127      </varlistentry>
128
129      <varlistentry>
130        <term><parameter>--with-native-system-headers-dir=/tools/include</parameter></term>
131        <listitem>
132          <para>This switch ensures that GCC will search for the system headers
133           in <filename class="directory">/tools/include</filename> and that
134           host system headers will not be searched.</para>
135        </listitem>
136      </varlistentry>
137
138      <varlistentry>
139        <term><parameter>--disable-shared</parameter></term>
140        <listitem>
141          <para>This tells GCC not to create a shared library.</para>
142        </listitem>
143      </varlistentry>
144
145      <varlistentry>
146        <term><parameter>--without-headers</parameter></term>
147        <listitem>
148          <para>Disables GCC from using the target's Libc when cross compiling.</para>
149        </listitem>
150      </varlistentry>
151
152      <varlistentry>
153        <term><parameter>--with-newlib</parameter></term>
154        <listitem>
155          <para>This causes GCC to enable the <envar>inhibit_libc</envar> flag,
156          which prevents <filename class="libraryfile">libgcc</filename>
157          from building code that uses libc support.</para>
158        </listitem>
159      </varlistentry>
160
161      <varlistentry>
162        <term><parameter>--disable-decimal-float</parameter></term>
163        <listitem>
164          <para>Disables support for the C decimal floating point extension.</para>
165        </listitem>
166      </varlistentry>
167
168      <varlistentry>
169        <term><parameter>--disable-lib*</parameter></term>
170        <listitem>
171          <para>These options prevent GCC from building a number of libraries
172          that are not needed at this time.</para>
173        </listitem>
174      </varlistentry>
175
176      <varlistentry>
177        <term><parameter>--disable-threads</parameter></term>
178        <listitem>
179          <para>This will prevent GCC from looking for the multi-thread
180          include files, since they haven't been created for this architecture
181          yet. GCC will be able to find the multi-thread information after
182          the Glibc headers are created.</para>
183        </listitem>
184      </varlistentry>
185
186      <varlistentry>
187        <term><parameter>--with-system-zlib</parameter></term>
188        <listitem>
189          <para>This tells GCC to link to the system-installed zlib instead
190          of the one in its source tree.</para>
191        </listitem>
192      </varlistentry>
193
194      <varlistentry>
195        <term><parameter>--enable-languages=c</parameter></term>
196        <listitem>
197          <para>This option ensures that only the C compiler is built.</para>
198        </listitem>
199      </varlistentry>
200
201      <varlistentry>
202        <term><parameter>--with-glibc-version=&glibc-version;</parameter></term>
203        <listitem>
204          <para>Needed when bootstrapping a cross toolchain without the header
205          files avilable for building the initial bootstrap compiler.</para>
206        </listitem>
207      </varlistentry>
208
209    </variablelist>
210
211    <para os="an">Continue with compiling the package:</para>
212
213<screen os="ao"><userinput>make all-gcc all-target-libgcc</userinput></screen>
214
215    <variablelist os="ap">
216      <title>The meaning of the new make options:</title>
217
218      <varlistentry>
219        <term><parameter>all-gcc all-target-libgcc</parameter></term>
220        <listitem>
221          <para>Compiles only the parts of GCC that are needed at this time,
222          rather than the full package.</para>
223        </listitem>
224      </varlistentry>
225
226    </variablelist>
227
228    <para os="aq">Install the package:</para>
229
230<screen os="ar"><userinput>make install-gcc install-target-libgcc</userinput></screen>
231
232  </sect2>
233
234  <sect2 role="content">
235    <title/>
236
237    <para>Details on this package are located in <xref
238    linkend="contents-gcc" role="."/></para>
239
240  </sect2>
241
242</sect1>
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