source: BOOK/cross-tools/common/gcc-static.xml @ ab77d4a

clfs-3.0.0-sysvinitsysvinit
Last change on this file since ab77d4a was a882002, checked in by Chris Staub <chris@…>, 10 years ago

Updated command explanations for gcc-static

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