source: BOOK/cross-tools/common/gcc-static.xml @ 513fe6e

systemd
Last change on this file since 513fe6e was 513fe6e, checked in by William Harrington <kb0iic@…>, 7 years ago

Remove --with-system-zlib configure option from cross-tools gcc static/final as most hosts won't have zlib.h around. No reason to add zlib as a dep to host sys req.

  • Property mode set to 100644
File size: 8.4 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<!--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    --enable-languages=c \
104    --with-glibc-version=&glibc-version;</userinput></screen>
105
106    <variablelist os="am">
107      <title>The meaning of the new configure options:</title>
108
109      <varlistentry>
110        <term><parameter>--build=${CLFS_HOST}</parameter></term>
111        <listitem>
112          <para>This specifies the system on which the cross-compiler is being
113          built.</para>
114        </listitem>
115      </varlistentry>
116
117      <varlistentry>
118        <term><parameter>--with-local-prefix=/tools</parameter></term>
119        <listitem>
120          <para>The purpose of this switch is to remove <filename
121          class="directory">/usr/local/include</filename> from
122          <command>gcc</command>'s include search path. This is not
123          absolutely essential, however, it helps to minimize the
124          influence of the host system.</para>
125        </listitem>
126      </varlistentry>
127
128      <varlistentry>
129        <term><parameter>--with-native-system-headers-dir=/tools/include</parameter></term>
130        <listitem>
131          <para>This switch ensures that GCC will search for the system headers
132           in <filename class="directory">/tools/include</filename> and that
133           host system headers will not be searched.</para>
134        </listitem>
135      </varlistentry>
136
137      <varlistentry>
138        <term><parameter>--disable-shared</parameter></term>
139        <listitem>
140          <para>This tells GCC not to create a shared library.</para>
141        </listitem>
142      </varlistentry>
143
144      <varlistentry>
145        <term><parameter>--without-headers</parameter></term>
146        <listitem>
147          <para>Disables GCC from using the target's Libc when cross compiling.</para>
148        </listitem>
149      </varlistentry>
150
151      <varlistentry>
152        <term><parameter>--with-newlib</parameter></term>
153        <listitem>
154          <para>This causes GCC to enable the <envar>inhibit_libc</envar> flag,
155          which prevents <filename class="libraryfile">libgcc</filename>
156          from building code that uses libc support.</para>
157        </listitem>
158      </varlistentry>
159
160      <varlistentry>
161        <term><parameter>--disable-decimal-float</parameter></term>
162        <listitem>
163          <para>Disables support for the C decimal floating point extension.</para>
164        </listitem>
165      </varlistentry>
166
167      <varlistentry>
168        <term><parameter>--disable-lib*</parameter></term>
169        <listitem>
170          <para>These options prevent GCC from building a number of libraries
171          that are not needed at this time.</para>
172        </listitem>
173      </varlistentry>
174
175      <varlistentry>
176        <term><parameter>--disable-threads</parameter></term>
177        <listitem>
178          <para>This will prevent GCC from looking for the multi-thread
179          include files, since they haven't been created for this architecture
180          yet. GCC will be able to find the multi-thread information after
181          the Glibc headers are created.</para>
182        </listitem>
183      </varlistentry>
184
185      <varlistentry>
186        <term><parameter>--with-system-zlib</parameter></term>
187        <listitem>
188          <para>This tells GCC to link to the system-installed zlib instead
189          of the one in its source tree.</para>
190        </listitem>
191      </varlistentry>
192
193      <varlistentry>
194        <term><parameter>--enable-languages=c</parameter></term>
195        <listitem>
196          <para>This option ensures that only the C compiler is built.</para>
197        </listitem>
198      </varlistentry>
199
200      <varlistentry>
201        <term><parameter>--with-glibc-version=&glibc-version;</parameter></term>
202        <listitem>
203          <para>Needed when bootstrapping a cross toolchain without the header
204          files avilable for building the initial bootstrap compiler.</para>
205        </listitem>
206      </varlistentry>
207
208    </variablelist>
209
210    <para os="an">Continue with compiling the package:</para>
211
212<screen os="ao"><userinput>make all-gcc all-target-libgcc</userinput></screen>
213
214    <variablelist os="ap">
215      <title>The meaning of the new make options:</title>
216
217      <varlistentry>
218        <term><parameter>all-gcc all-target-libgcc</parameter></term>
219        <listitem>
220          <para>Compiles only the parts of GCC that are needed at this time,
221          rather than the full package.</para>
222        </listitem>
223      </varlistentry>
224
225    </variablelist>
226
227    <para os="aq">Install the package:</para>
228
229<screen os="ar"><userinput>make install-gcc install-target-libgcc</userinput></screen>
230
231  </sect2>
232
233  <sect2 role="content">
234    <title/>
235
236    <para>Details on this package are located in <xref
237    linkend="contents-gcc" role="."/></para>
238
239  </sect2>
240
241</sect1>
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