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-system-gcc" role="wrap"> |
---|
9 | <?dbhtml filename="gcc.html"?> |
---|
10 | |
---|
11 | <title>GCC-&gcc-version;</title> |
---|
12 | |
---|
13 | <indexterm zone="ch-system-gcc"> |
---|
14 | <primary sortas="a-GCC">GCC</primary> |
---|
15 | </indexterm> |
---|
16 | |
---|
17 | <sect2 role="package"> |
---|
18 | <title/> |
---|
19 | |
---|
20 | <para>The GCC package contains the GNU compiler collection, which includes |
---|
21 | the C and C++ compilers.</para> |
---|
22 | |
---|
23 | </sect2> |
---|
24 | |
---|
25 | <sect2 role="installation"> |
---|
26 | <title>Installation of GCC</title> |
---|
27 | |
---|
28 | <para os="p1">To make sure that a couple of tools use the proper syntax, |
---|
29 | apply the following patch:</para> |
---|
30 | |
---|
31 | <screen os="p2"><userinput>patch -Np1 -i ../&gcc-posix-patch;</userinput></screen> |
---|
32 | |
---|
33 | <para os="p3">The following patch fixes the searching of multilib dirs |
---|
34 | for specs file. The patch standardizes the gcc drivers path iteration |
---|
35 | functions, ensuring multilib directories are searched in the correct |
---|
36 | order. This fixes various issues, most noticably with libtool on |
---|
37 | multilib systems:</para> |
---|
38 | |
---|
39 | <screen os="p4"><userinput>patch -Np1 -i ../&gcc-PR20425-patch;</userinput></screen> |
---|
40 | |
---|
41 | <para os="a">Apply a <command>sed</command> substitution that will suppress the |
---|
42 | installation of <filename class="libraryfile">libiberty.a</filename>. The |
---|
43 | version of <filename class="libraryfile">libiberty.a</filename> provided by |
---|
44 | Binutils will be used instead:</para> |
---|
45 | |
---|
46 | <screen os="b"><userinput>cp libiberty/Makefile.in{,.orig} |
---|
47 | sed 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in.orig > libiberty/Makefile.in</userinput></screen> |
---|
48 | |
---|
49 | <para os="e1">GCC provides a <command>gccbug</command> script which detects at |
---|
50 | compile time whether mktemp is present, and hardcodes the result in a test. |
---|
51 | If mktemp is not found, the script will fall back to using less |
---|
52 | random names for temporary files. We will be installing mktemp |
---|
53 | later, so the following sed will simulate its presence:</para> |
---|
54 | |
---|
55 | <screen os="e2"><userinput>cp gcc/gccbug.in{,.orig} |
---|
56 | sed 's/@have_mktemp_command@/yes/' gcc/gccbug.in.orig > gcc/gccbug.in</userinput></screen> |
---|
57 | |
---|
58 | <para os="s1">The fixincludes attempts to "fix" the system headers |
---|
59 | installed so far. Since gcc is cross-compiled expecting the system |
---|
60 | headers to be in <filename class="directory">/usr/include</filename> |
---|
61 | the script will be looking at host headers. The following sed prevents |
---|
62 | the fixincludes script from running:</para> |
---|
63 | |
---|
64 | <screen os="s2"><userinput>cp gcc/Makefile.in{,.orig} |
---|
65 | sed 's@\./fixinc\.sh@-c true@' gcc/Makefile.in.orig > gcc/Makefile.in</userinput></screen> |
---|
66 | |
---|
67 | <para os="c">The GCC documentation recommends building GCC outside of the source |
---|
68 | directory in a dedicated build directory:</para> |
---|
69 | |
---|
70 | <screen os="d"><userinput>mkdir -v ../gcc-build |
---|
71 | cd ../gcc-build</userinput></screen> |
---|
72 | |
---|
73 | <para os="e">Prepare GCC for compilation:</para> |
---|
74 | |
---|
75 | <screen os="f"><userinput>../gcc-&gcc-version;/configure --prefix=/usr --libexecdir=/usr/lib \ |
---|
76 | --build=${CLFS_HOST} --host=${CLFS_TARGET} --target=${CLFS_TARGET} \ |
---|
77 | --enable-shared --enable-threads=posix --enable-__cxa_atexit \ |
---|
78 | --enable-c99 --enable-long-long --enable-clocale=gnu \ |
---|
79 | --enable-languages=c,c++ --disable-libstdcxx-pch</userinput></screen> |
---|
80 | |
---|
81 | <para os="g">Compile the package:</para> |
---|
82 | |
---|
83 | <screen os="h"><userinput>make</userinput></screen> |
---|
84 | |
---|
85 | <para os="i">Install the package:</para> |
---|
86 | |
---|
87 | <screen os="j"><userinput>make DESTDIR=${CLFS} install</userinput></screen> |
---|
88 | |
---|
89 | <para os="k">Some packages expect the C preprocessor to be installed in the |
---|
90 | <filename class="directory">/lib</filename> directory. |
---|
91 | To support those packages, create this symlink:</para> |
---|
92 | |
---|
93 | <screen os="l"><userinput>ln -sfv ../usr/bin/cpp ${CLFS}/lib</userinput></screen> |
---|
94 | |
---|
95 | <para os="m">Many packages use the name <command>cc</command> to call the C |
---|
96 | compiler. To satisfy those packages, create a symlink:</para> |
---|
97 | |
---|
98 | <screen os="o"><userinput>ln -sfv gcc ${CLFS}/usr/bin/cc</userinput></screen> |
---|
99 | |
---|
100 | </sect2> |
---|
101 | |
---|
102 | <sect2 id="contents-gcc" role="content"> |
---|
103 | <title>Contents of GCC</title> |
---|
104 | |
---|
105 | <segmentedlist> |
---|
106 | <segtitle>Installed programs</segtitle> |
---|
107 | <segtitle>Installed libraries</segtitle> |
---|
108 | |
---|
109 | <seglistitem> |
---|
110 | <seg>c++, cc (link to gcc), cpp, g++, gcc, gccbug, and gcov</seg> |
---|
111 | <seg>libgcc.a, libgcc_eh.a, libgcc_s.so, libmudflap.[a,so], |
---|
112 | libmudflapth.[a,so], libstdc++.[a,so], and |
---|
113 | libsupc++.a</seg> |
---|
114 | </seglistitem> |
---|
115 | </segmentedlist> |
---|
116 | |
---|
117 | <variablelist> |
---|
118 | <bridgehead renderas="sect3">Short Descriptions</bridgehead> |
---|
119 | <?dbfo list-presentation="list"?> |
---|
120 | <?dbhtml list-presentation="table"?> |
---|
121 | |
---|
122 | <varlistentry id="cc"> |
---|
123 | <term><command>cc</command></term> |
---|
124 | <listitem> |
---|
125 | <para>The C compiler</para> |
---|
126 | <indexterm zone="ch-system-gcc cc"> |
---|
127 | <primary sortas="b-cc">cc</primary> |
---|
128 | </indexterm> |
---|
129 | </listitem> |
---|
130 | </varlistentry> |
---|
131 | |
---|
132 | <varlistentry id="cpp"> |
---|
133 | <term><command>cpp</command></term> |
---|
134 | <listitem> |
---|
135 | <para>The C preprocessor; it is used by the compiler to expand the |
---|
136 | #include, #define, and similar statements in the source files</para> |
---|
137 | <indexterm zone="ch-system-gcc cpp"> |
---|
138 | <primary sortas="b-cpp">cpp</primary> |
---|
139 | </indexterm> |
---|
140 | </listitem> |
---|
141 | </varlistentry> |
---|
142 | |
---|
143 | <varlistentry id="c"> |
---|
144 | <term><command>c++</command></term> |
---|
145 | <listitem> |
---|
146 | <para>The C++ compiler</para> |
---|
147 | <indexterm zone="ch-system-gcc c"> |
---|
148 | <primary sortas="b-c++">c++</primary> |
---|
149 | </indexterm> |
---|
150 | </listitem> |
---|
151 | </varlistentry> |
---|
152 | |
---|
153 | <varlistentry id="g"> |
---|
154 | <term><command>g++</command></term> |
---|
155 | <listitem> |
---|
156 | <para>The C++ compiler</para> |
---|
157 | <indexterm zone="ch-system-gcc g"> |
---|
158 | <primary sortas="b-g++">g++</primary> |
---|
159 | </indexterm> |
---|
160 | </listitem> |
---|
161 | </varlistentry> |
---|
162 | |
---|
163 | <varlistentry id="gcc"> |
---|
164 | <term><command>gcc</command></term> |
---|
165 | <listitem> |
---|
166 | <para>The C compiler</para> |
---|
167 | <indexterm zone="ch-system-gcc gcc"> |
---|
168 | <primary sortas="b-gcc">gcc</primary> |
---|
169 | </indexterm> |
---|
170 | </listitem> |
---|
171 | </varlistentry> |
---|
172 | |
---|
173 | <varlistentry id="gccbug"> |
---|
174 | <term><command>gccbug</command></term> |
---|
175 | <listitem> |
---|
176 | <para>A shell script used to help create useful bug reports</para> |
---|
177 | <indexterm zone="ch-system-gcc gccbug"> |
---|
178 | <primary sortas="b-gccbug">gccbug</primary> |
---|
179 | </indexterm> |
---|
180 | </listitem> |
---|
181 | </varlistentry> |
---|
182 | |
---|
183 | <varlistentry id="gcov"> |
---|
184 | <term><command>gcov</command></term> |
---|
185 | <listitem> |
---|
186 | <para>A coverage testing tool; it is used to analyze programs to |
---|
187 | determine where optimizations will have the most effect</para> |
---|
188 | <indexterm zone="ch-system-gcc gcov"> |
---|
189 | <primary sortas="b-gcov">gcov</primary> |
---|
190 | </indexterm> |
---|
191 | </listitem> |
---|
192 | </varlistentry> |
---|
193 | |
---|
194 | <varlistentry id="libgcc"> |
---|
195 | <term><filename class="libraryfile">libgcc</filename></term> |
---|
196 | <listitem> |
---|
197 | <para>Contains run-time support for <command>gcc</command></para> |
---|
198 | <indexterm zone="ch-system-gcc libgcc"> |
---|
199 | <primary sortas="c-libgcc*">libgcc*</primary> |
---|
200 | </indexterm> |
---|
201 | </listitem> |
---|
202 | </varlistentry> |
---|
203 | |
---|
204 | <varlistentry id="libmudflap"> |
---|
205 | <term><filename class="libraryfile">libmudflap</filename></term> |
---|
206 | <listitem> |
---|
207 | <para>The libmudflap libraries are used by GCC for instrumenting |
---|
208 | pointer and array dereferencing operations.</para> |
---|
209 | <indexterm zone="ch-system-gcc libmudflap"> |
---|
210 | <primary sortas="c-libmudflap*">libmudflap*</primary> |
---|
211 | </indexterm> |
---|
212 | </listitem> |
---|
213 | </varlistentry> |
---|
214 | |
---|
215 | <varlistentry id="libstdc"> |
---|
216 | <term><filename class="libraryfile">libstdc++</filename></term> |
---|
217 | <listitem> |
---|
218 | <para>The standard C++ library</para> |
---|
219 | <indexterm zone="ch-system-gcc libstdc"> |
---|
220 | <primary sortas="c-libstdc++">libstdc++</primary> |
---|
221 | </indexterm> |
---|
222 | </listitem> |
---|
223 | </varlistentry> |
---|
224 | |
---|
225 | <varlistentry id="libsupc"> |
---|
226 | <term><filename class="libraryfile">libsupc++</filename></term> |
---|
227 | <listitem> |
---|
228 | <para>Provides supporting routines for the C++ programming |
---|
229 | language</para> |
---|
230 | <indexterm zone="ch-system-gcc libsupc"> |
---|
231 | <primary sortas="c-libsupc++">libsupc++</primary> |
---|
232 | </indexterm> |
---|
233 | </listitem> |
---|
234 | </varlistentry> |
---|
235 | |
---|
236 | </variablelist> |
---|
237 | |
---|
238 | </sect2> |
---|
239 | |
---|
240 | </sect1> |
---|