source: general/prog/gcc.xml@ 65374012

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Last change on this file since 65374012 was 65374012, checked in by Bruce Dubbs <bdubbs@…>, 2 years ago

Update to xfsprogs-5.0.0.
Update to v4l-utils-1.16.6.
Update to cbindgen-0.8.5.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@21553 af4574ff-66df-0310-9fd7-8a98e5e911e0

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File size: 15.6 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 <!ENTITY gcc-download-http "&gnu-http;/gcc/gcc-&gcc-version;/gcc-&gcc-version;.tar.xz">
8 <!ENTITY gcc-download-ftp "&gnu-ftp;/gcc/gcc-&gcc-version;/gcc-&gcc-version;.tar.xz">
9 <!ENTITY gcc-md5sum "6069ae3737cf02bf2cb44a391ef0e937">
10 <!ENTITY gcc-size "67 MB">
11 <!ENTITY gcc-buildsize "9.2 GB (2.1 GB installed with all listed languages; add 823 MB for tests)">
12 <!ENTITY gcc-time "24 SBU (with parallelism=4, add 51 SBU for tests with parallelism=4)">
13]>
14
15<sect1 id="gcc" xreflabel="GCC-&gcc-version;">
16 <?dbhtml filename="gcc.html" ?>
17
18 <sect1info>
19 <othername>$LastChangedBy$</othername>
20 <date>$Date$</date>
21 </sect1info>
22
23 <title>GCC-&gcc-version;</title>
24
25 <indexterm zone="gcc">
26 <primary sortas="a-gcc-5-0">GCC-&gcc-version;</primary>
27 </indexterm>
28
29 <sect2 role="package">
30 <title>Introduction to GCC</title>
31
32 <para>
33 The <application>GCC</application> package contains the GNU Compiler
34 Collection. This page describes the installation of compilers for the
35 following languages: C, C++, Fortran, Objective C, Objective C++, and Go.
36 <!--One additional language, Ada, is available in the collection. It has
37 a binary bootstrap requirement for the first installation, so it is
38 described on a separate page (<xref linkend="gcc-ada"/>) but can be added
39 here if you are performing a rebuild or upgrade. Since C and C++ are
40 installed in LFS, this page is either for upgrading C and C++, or for
41 installing additional compilers.-->
42 </para>
43
44 &lfs84_checked;
45
46 <caution>
47 <para>
48 If you are upgrading <application>GCC</application> from any other
49 version prior to &gcc-version;, then you must be careful compiling 3rd
50 party kernel modules. You should ensure that the kernel and all its
51 native modules are also compiled using the same version of
52 <application>GCC</application> that you use to build the 3rd party module.
53 This issue does not affect native kernel (and kernel modules) updates,
54 as the instructions below are a complete reinstallation of
55 <application>GCC</application>. If you have existing 3rd party modules
56 installed, ensure they are recompiled using the updated version of
57 <application>GCC</application>. As always, never update the kernel
58 headers from the ones used when <application>Glibc</application> was
59 compiled during LFS.
60 </para>
61
62 <para>
63 Some system headers need to be fixed to be used with GCC. This is done
64 during the installation of GCC, and the <quote>fixed</quote> headers
65 are installed in <filename class="directory">
66 /usr/lib/gcc/&lt;machine triplet&gt;/&lt;GCC version&gt;/include-fixed
67 </filename>. This is harmless if GCC is built during the LFS stage. But
68 if you reinstall GCC in BLFS, some of the BLFS packages may be
69 <quote>fixed</quote>. If one of those packages is reinstalled
70 afterwards, the <quote>fixed</quote> headers are not updated, which may
71 lead to version mismatches. In case that happens, the
72 <quote>fixed</quote> headers must be updated by running (as
73 <systemitem class="username">root</systemitem>):
74 <command>
75 /usr/libexec/gcc/x86_64-pc-linux-gnu/&gcc-version;/install-tools/mkheaders
76 </command>. The machine triplet may be different on a 32bit system.
77 </para>
78 </caution>
79
80 <bridgehead renderas="sect3">Package Information</bridgehead>
81 <itemizedlist spacing="compact">
82 <listitem>
83 <para>
84 Download (HTTP): <ulink url="&gcc-download-http;"/>
85 </para>
86 </listitem>
87 <listitem>
88 <para>
89 Download (FTP): <ulink url="&gcc-download-ftp;"/>
90 </para>
91 </listitem>
92 <listitem>
93 <para>
94 Download MD5 sum: &gcc-md5sum;
95 </para>
96 </listitem>
97 <listitem>
98 <para>
99 Download size: &gcc-size;
100 </para>
101 </listitem>
102 <listitem>
103 <para>
104 Estimated disk space required: &gcc-buildsize;
105 </para>
106 </listitem>
107 <listitem>
108 <para>
109 Estimated build time: &gcc-time;
110 </para>
111 </listitem>
112 </itemizedlist>
113
114<!-- <bridgehead renderas="sect3">Additional Downloads</bridgehead>
115 <itemizedlist spacing="compact">
116 <listitem>
117 <para>
118 Required patch:
119 <ulink url="&patch-root;/gcc-&gcc-version;-upstream_fixes-1.patch"/>
120 </para>
121 </listitem>
122 </itemizedlist>
123-->
124
125 <bridgehead renderas="sect3">GCC Dependencies</bridgehead>
126
127 <bridgehead renderas="sect4">Recommended</bridgehead>
128 <para role="recommended">
129 <xref linkend="dejagnu"/>, for tests
130 </para>
131
132 <bridgehead renderas="sect4">Optional</bridgehead>
133 <para role="optional">
134 <xref linkend="gdb"/>,
135 <xref linkend="valgrind"/> (for tests), and
136 <ulink url="https://repo.or.cz/isl.git">ISL</ulink> (to enable graphite optimization)
137 </para>
138
139 <para condition="html" role="usernotes">
140 User Notes: <ulink url="&blfs-wiki;/gcc"/>
141 </para>
142
143 </sect2>
144
145 <sect2 role="installation">
146 <title>Installation of GCC</title>
147
148 <important>
149 <para>
150 Even if you specify only languages other than C and C++ to the
151 <command>./configure</command> command below, the
152 installation process will overwrite your existing
153 <application>GCC</application> C and C++ compilers and libraries.
154 Having the <application>Tcl</application>,
155 <application>Expect</application> and <application>DejaGnu</application>
156 packages installed before beginning the build is highly recommended so
157 you can run the full suite of tests.
158 </para>
159
160 <para>
161 Do not continue with the <command>make install</command> command
162 until you are confident the build was successful. You can compare your
163 test results with those found at <ulink
164 url="http://gcc.gnu.org/ml/gcc-testresults/"/>. You may also want to
165 refer to the information found in the <application>GCC</application>
166 section of Chapter 6 in the LFS book (<ulink
167 url="&lfs-root;/chapter06/gcc.html"/>).
168 </para>
169 </important>
170
171 <para>
172 The instructions below are intentionally performing a
173 <quote>bootstrap</quote> process. Bootstrapping is needed for robustness
174 and is highly recommended when upgrading the compilers version. To disable
175 bootstrap anyways, add <parameter>--disable-bootstrap</parameter> to the
176 <command>./configure</command> options below.
177 </para>
178
179 <para>
180 Install <application>GCC</application> by running the following commands:
181 </para>
182
183<screen><userinput>case $(uname -m) in
184 x86_64)
185 sed -e '/m64=/s/lib64/lib/' \
186 -i.orig gcc/config/i386/t-linux64
187 ;;
188esac
189
190mkdir build &amp;&amp;
191cd build &amp;&amp;
192
193../configure \
194 --prefix=/usr \
195 --disable-multilib \
196 --disable-libmpx \
197 --with-system-zlib \
198 --enable-languages=c,c++,fortran,go,objc,obj-c++ &amp;&amp;
199make</userinput></screen>
200
201 <para>
202 If you have installed additional packages such as
203 <application>Valgrind</application> and <application>GDB</application>,
204 the <application>GCC</application> part of the testsuite will run more
205 tests than in LFS. Some of those will report FAIL and others XPASS
206 (pass when expected to FAIL). As of gcc-8.3.0, the -flto suite
207 is known to fail, as well as miscellaneous failures throughout the rest
208 of the test suite. If all the compilers below are built, there will be
209 slightly over 100 failures out of over 360,000 tests.
210 To run the tests, issue:
211 </para>
212
213<screen><userinput>ulimit -s 32768 &amp;&amp;
214make -k check</userinput></screen>
215<!-- The command above may error out, so using && may prevent the summary
216to be run. -->
217
218 <para>
219 The tests are very long, and the results may be hard to find in the
220 logs, specially if you use parallel jobs with make. You can get a summary
221 of the tests with:
222 </para>
223
224<screen><userinput>../contrib/test_summary</userinput></screen>
225
226 <para>
227 Now, as the <systemitem class="username">root</systemitem> user:
228 </para>
229
230<screen role="root"><userinput>make install &amp;&amp;
231
232mkdir -pv /usr/share/gdb/auto-load/usr/lib &amp;&amp;
233mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib &amp;&amp;
234
235chown -v -R root:root \
236 /usr/lib/gcc/*linux-gnu/&gcc-version;/include{,-fixed}</userinput></screen>
237
238 <para>
239 Some packages expect to find the C preprocessor in
240 <filename class="directory">/lib</filename> or may refer to the C compiler
241 under the name <command>cc</command>. The following symbolic links are not
242 needed if you have followed the LFS instructions, since they
243 have been already created. If you do not have them on your system, issue
244 as the <systemitem class="username">root</systemitem> user:
245 </para>
246
247<screen role="root"><userinput>ln -v -sf ../usr/bin/cpp /lib &amp;&amp;
248ln -v -sf gcc /usr/bin/cc &amp;&amp;
249install -v -dm755 /usr/lib/bfd-plugins &amp;&amp;
250ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/&gcc-version;/liblto_plugin.so /usr/lib/bfd-plugins/</userinput></screen>
251
252 </sect2>
253
254 <sect2 role="commands">
255 <title>Command Explanations</title>
256
257 <para>
258 <command>mkdir build; cd build</command>: The
259 <application>GCC</application> documentation recommends
260 building the package in a dedicated build directory.
261 </para>
262
263 <para>
264 <parameter>--disable-multilib</parameter>: This parameter ensures
265 that files are created for the specific architecture of your computer.
266 </para>
267
268 <para>
269 <parameter>--with-system-zlib</parameter>: Uses the system
270 <application>zlib</application> instead of the bundled one.
271 <application>zlib</application> is used for compressing
272 and uncompressing <application>GCC</application>'s intermediate
273 language in LTO (Link Time Optimization) object files.
274 </para>
275
276 <para>
277 <parameter>--enable-languages=c,c++,fortran,go,objc,obj-c++</parameter>:
278 This command identifies which languages to build. You may modify
279 this command to remove undesired languages. Two other languages can be
280 added, besides ADA (see introduction above): BRIG (add
281 <parameter>brig</parameter> to the list of enabled languages), a binary
282 format for HSAIL (Heterogeneous System Architecture Intermediate
283 Language), and JIT (add <parameter>jit</parameter> to the list of enabled
284 languages), a library which can be linked into interpreters that want to
285 generate machine code <quote>on the fly</quote> at run-time. They have not
286 been tested by the BLFS developers.
287 </para>
288 <!-- It's been three major versions now, and many years.
289 Commenting out unless needed somewhere. -renodr
290 <para>
291 <option>- -with-default-libstdcxx-abi=gcc4-compatible</option>: Use this
292 switch if you are upgrading from a <application>GCC</application>
293 version prior to 5.1.0, and you do not want to recompile all the
294 libraries written in C++.
295 </para>
296 -->
297
298 <para>
299 <command>ulimit -s 32768</command>: This command prevents several
300 tests from running out of stack space.
301 </para>
302
303 <para>
304 <command>make -k check</command>: This command runs the test suite
305 without stopping if any errors are encountered.
306 </para>
307
308 <para>
309 <command>../contrib/test_summary</command>: This command will produce
310 a summary of the test suite results. You can append <command>| grep
311 -A7 Summ</command> to the command to produce an even more condensed
312 version of the summary. You may also wish to redirect the output
313 to a file for review and comparison later on.
314 </para>
315
316 <para>
317 <command>mv -v /usr/lib/*gdb.py ...</command>: The installation
318 stage puts some files used by <application>gdb</application> under the
319 <filename class="directory">/usr/lib</filename> directory. This generates
320 spurious error messages when performing <command>ldconfig</command>. This
321 command moves the files to another location.
322 </para>
323
324 <para>
325 <command>chown -v -R root:root /usr/lib/gcc/*linux-gnu/...</command>:
326 If the package is built by a user other than root, the ownership of the
327 installed <filename class="directory">include</filename> directory (and
328 its content) will be incorrect. This command changes the ownership to the
329 <systemitem class="username">root</systemitem> user and group.
330 </para>
331
332 </sect2>
333
334 <sect2 role="content">
335 <title>Contents</title>
336
337 <para>
338 Some program and library names and descriptions are not listed here,
339 but can be found at
340 <ulink url="&lfs-root;/chapter06/gcc.html#contents-gcc"/> as they were
341 initially installed during the building of LFS.
342 </para>
343
344 <segmentedlist>
345 <segtitle>Installed Programs</segtitle>
346 <segtitle>Installed Libraries</segtitle>
347 <segtitle>Installed Directories</segtitle>
348
349 <seglistitem>
350 <seg>
351 gccgo, go, gofmt, and gfortran, hard-linked to architecture specific
352 names
353 </seg>
354 <seg>
355 libgfortran.{so,a},
356 libgo.{so,a}, libgobegin.a, libgolibbegin.a,
357 libobjc.{so,a}, and numerous other run-time libraries and executables
358 </seg>
359 <seg>
360 /usr/lib/go
361 </seg>
362 </seglistitem>
363 </segmentedlist>
364
365 <variablelist>
366 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
367 <?dbfo list-presentation="list"?>
368 <?dbhtml list-presentation="table"?>
369
370 <varlistentry id="gccgo">
371 <term><command>gccgo</command></term>
372 <listitem>
373 <para>
374 is a GCC-based compiler for the <application>Go</application>
375 language.
376 </para>
377 <indexterm zone="gcc gccgo">
378 <primary sortas="b-gccgo">gccgo</primary>
379 </indexterm>
380 </listitem>
381 </varlistentry>
382
383 <varlistentry id="go">
384 <term><command>go</command></term>
385 <listitem>
386 <para>
387 is a tool for managing <application>Go</application> source code.
388 </para>
389 <indexterm zone="gcc go">
390 <primary sortas="b-go">go</primary>
391 </indexterm>
392 </listitem>
393 </varlistentry>
394
395 <varlistentry id="gofmt">
396 <term><command>gofmt</command></term>
397 <listitem>
398 <para>
399 is a tool for formatting <application>Go</application> source code.
400 </para>
401 <indexterm zone="gcc gofmt">
402 <primary sortas="b-gofmt">gofmt</primary>
403 </indexterm>
404 </listitem>
405 </varlistentry>
406
407 <varlistentry id="gfortran">
408 <term><command>gfortran</command></term>
409 <listitem>
410 <para>
411 is a GCC-based compiler for the <application>Fortran</application>
412 language.
413 </para>
414 <indexterm zone="gcc gfortran">
415 <primary sortas="b-gfortran">gfortran</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 </variablelist>
421
422 </sect2>
423
424</sect1>
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