source: BOOK/cross-tools/common/gcc-static.xml@ 389c29d

clfs-3.0.0-systemd systemd
Last change on this file since 389c29d was 389c29d, 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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