source: chapter06/gcc.xml@ a97aa3d

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Last change on this file since a97aa3d was efcb393, checked in by Pierre Labastie <pieere@…>, 4 years ago

Make the new book

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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-system-gcc" role="wrap">
9 <?dbhtml filename="gcc.html"?>
10
11 <sect1info condition="script">
12 <productname>gcc</productname>
13 <productnumber>&gcc-version;</productnumber>
14 <address>&gcc-url;</address>
15 </sect1info>
16
17 <title>GCC-&gcc-version;</title>
18
19 <indexterm zone="ch-system-gcc">
20 <primary sortas="a-GCC">GCC</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The GCC package contains the GNU compiler collection, which includes
27 the C and C++ compilers.</para>
28
29 <segmentedlist>
30 <segtitle>&buildtime;</segtitle>
31 <segtitle>&diskspace;</segtitle>
32
33 <seglistitem>
34 <seg>&gcc-ch6-sbu;</seg>
35 <seg>&gcc-ch6-du;</seg>
36 </seglistitem>
37 </segmentedlist>
38
39 </sect2>
40
41 <sect2 role="installation">
42 <title>Installation of GCC</title>
43
44 <para>If building on x86_64, change the default directory name for 64-bit
45 libraries to <quote>lib</quote>:</para>
46
47<screen><userinput remap="pre">case $(uname -m) in
48 x86_64)
49 sed -e '/m64=/s/lib64/lib/' \
50 -i.orig gcc/config/i386/t-linux64
51 ;;
52esac</userinput></screen>
53
54 <para>The GCC documentation recommends building GCC in a dedicated build directory:</para>
55
56<screen><userinput remap="pre">mkdir -v build
57cd build</userinput></screen>
58
59 <para>Prepare GCC for compilation:</para>
60
61<screen><userinput remap="configure">../configure --prefix=/usr \
62 LD=ld \
63 --enable-languages=c,c++ \
64 --disable-multilib \
65 --disable-bootstrap \
66 --with-system-zlib</userinput></screen>
67
68 <para>Note that for other languages, there are some prerequisites that
69 are not yet available. See the
70 <ulink url="&blfs-book;general/gcc.html">BLFS Book</ulink>
71 for instructions on how to build all of GCC's supported languages.</para>
72
73 <variablelist>
74 <title>The meaning of the new configure parameter:</title>
75
76 <varlistentry>
77 <term><parameter>--with-system-zlib</parameter></term>
78 <listitem>
79 <para>This switch tells GCC to link to the system installed copy of
80 the Zlib library, rather than its own internal copy.</para>
81 </listitem>
82 </varlistentry>
83 </variablelist>
84
85 <para>Compile the package:</para>
86
87<screen><userinput remap="make">make</userinput></screen>
88
89 <important>
90 <para>In this section, the test suite for GCC is considered
91 critical. Do not skip it under any circumstance.</para>
92 </important>
93
94 <para>One set of tests in the GCC test suite is known to exhaust the stack,
95 so increase the stack size prior to running the tests:</para>
96
97<screen><userinput remap="test">ulimit -s 32768</userinput></screen>
98
99 <para>Test the results as a non-privileged user, but do not stop at errors:</para>
100
101<screen><userinput remap="test">chown -Rv nobody .
102su nobody -s /bin/bash -c "PATH=$PATH make -k check"</userinput></screen>
103
104 <para>To receive a summary of the test suite results, run:</para>
105
106<screen><userinput remap="test">../contrib/test_summary</userinput></screen>
107
108 <para>For only the summaries, pipe the output through
109 <userinput>grep -A7 Summ</userinput>.</para>
110
111 <para>Results can be compared with those located at <ulink
112 url="&test-results;"/> and
113 <ulink url="https://gcc.gnu.org/ml/gcc-testresults/"/>.</para>
114
115 <para>Six tests related to get_time are known to fail. These are
116 apparently related to the en_HK locale.</para>
117
118 <para>Two tests named lookup.cc and reverse.cc in experimental/net
119 are known to fail in LFS chroot environment because they require
120 /etc/hosts and iana-etc.</para>
121
122 <para>Two tests named pr57193.c and pr90178.c are known to fail.</para>
123
124 <para>A few unexpected failures cannot always be avoided. The GCC developers
125 are usually aware of these issues, but have not resolved them yet.
126 Unless the test results are vastly different from those at the above URL,
127 it is safe to continue.</para>
128
129 <!--note><para>
130 On some combinations of kernel configuration and AMD processors
131 there may be more than 1100 failures in the gcc.target/i386/mpx
132 tests (which are designed to test the MPX option on recent
133 Intel processors). These can safely be ignored on AMD
134 processors. These tests will also fail on Intel processors if MPX support
135 is not enabled in the kernel even though it is present on the CPU.
136 </para></note-->
137
138 <para>Install the package and remove an unneeded directory:</para>
139
140<screen><userinput remap="install">make install
141rm -rf /usr/lib/gcc/$(gcc -dumpmachine)/&gcc-version;/include-fixed/bits/</userinput></screen>
142
143 <para>The GCC build directory is owned by <systemitem class="username">
144 nobody</systemitem> now and the ownership of the installed header
145 directory (and its content) will be incorrect. Change the ownership to
146 <systemitem class="username">root</systemitem> user and group:</para>
147
148<screen><userinput remap="install">chown -v -R root:root \
149 /usr/lib/gcc/*linux-gnu/&gcc-version;/include{,-fixed}</userinput></screen>
150
151 <para>Create a symlink required by the <ulink
152 url="https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch03s09.html">FHS</ulink>
153 for "historical" reasons.</para>
154
155<screen><userinput remap="install">ln -sv ../usr/bin/cpp /lib</userinput></screen>
156 <!-- already done earlier
157 <para>Many packages use the name <command>cc</command> to call the C
158 compiler. To satisfy those packages, create a symlink:</para>
159
160<screen><userinput remap="install">ln -sv gcc /usr/bin/cc</userinput></screen>
161 -->
162 <para>Add a compatibility symlink to enable building programs with
163 Link Time Optimization (LTO):</para>
164
165<screen><userinput remap="install">install -v -dm755 /usr/lib/bfd-plugins
166ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/&gcc-version;/liblto_plugin.so \
167 /usr/lib/bfd-plugins/</userinput></screen>
168
169 <para>Now that our final toolchain is in place, it is important to again ensure
170 that compiling and linking will work as expected. We do this by performing
171 the same sanity checks as we did earlier in the chapter:</para>
172
173 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
174 href="adjusting.xml"
175 xpointer="xpointer(//*[@os='a'])"/>
176
177 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
178 href="adjusting.xml"
179 xpointer="xpointer(//*[@os='b'])"/>
180
181 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
182 href="adjusting.xml"
183 xpointer="xpointer(//*[@os='c'])"/>
184
185 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
186 href="adjusting.xml"
187 xpointer="xpointer(//*[@os='d'])"/>
188
189 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
190 href="adjusting.xml"
191 xpointer="xpointer(//*[@os='e'])"/>
192
193 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
194 href="adjusting.xml"
195 xpointer="xpointer(//*[@os='f'])"/>
196
197<screen><computeroutput>/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crt1.o succeeded
198/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crti.o succeeded
199/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crtn.o succeeded</computeroutput></screen>
200
201 <para>Depending on your machine architecture, the above may differ slightly,
202 the difference usually being the name of the directory
203 after <filename class="directory">/usr/lib/gcc</filename>. The important
204 thing to look for here is that <command>gcc</command> has found all three
205 <filename>crt*.o</filename> files under the
206 <filename class="directory">/usr/lib</filename> directory.</para>
207
208 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
209 href="adjusting.xml"
210 xpointer="xpointer(//*[@os='g'])"/>
211
212<screen><userinput>grep -B4 '^ /usr/include' dummy.log</userinput></screen>
213
214 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
215 href="adjusting.xml"
216 xpointer="xpointer(//*[@os='h'])"/>
217
218<screen><computeroutput>#include &lt;...&gt; search starts here:
219 /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include
220 /usr/local/include
221 /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include-fixed
222 /usr/include</computeroutput></screen>
223
224 <para>Again, note that the directory named after your target triplet may be
225 different than the above, depending on your architecture.</para>
226
227<!-- This appears to be obsolete
228
229 <note><para>As of version 4.3.0, GCC now unconditionally installs the
230 <filename>limits.h</filename> file into the private
231 <filename class="directory">include-fixed</filename> directory, and that
232 directory is required to be in place.</para></note>
233-->
234
235 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
236 href="adjusting.xml"
237 xpointer="xpointer(//*[@os='i'])"/>
238
239 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
240 href="adjusting.xml"
241 xpointer="xpointer(//*[@os='j'])"/>
242
243 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
244 href="adjusting.xml"
245 xpointer="xpointer(//*[@os='k'])"/>
246
247<screen><computeroutput>SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib64")
248SEARCH_DIR("/usr/local/lib64")
249SEARCH_DIR("/lib64")
250SEARCH_DIR("/usr/lib64")
251SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib")
252SEARCH_DIR("/usr/local/lib")
253SEARCH_DIR("/lib")
254SEARCH_DIR("/usr/lib");</computeroutput></screen>
255
256 <para>A 32-bit system may see a few different directories. For example, here
257 is the output from an i686 machine:</para>
258
259<screen><computeroutput>SEARCH_DIR("/usr/i686-pc-linux-gnu/lib32")
260SEARCH_DIR("/usr/local/lib32")
261SEARCH_DIR("/lib32")
262SEARCH_DIR("/usr/lib32")
263SEARCH_DIR("/usr/i686-pc-linux-gnu/lib")
264SEARCH_DIR("/usr/local/lib")
265SEARCH_DIR("/lib")
266SEARCH_DIR("/usr/lib");</computeroutput></screen>
267
268 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
269 href="adjusting.xml"
270 xpointer="xpointer(//*[@os='l'])"/>
271
272 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
273 href="adjusting.xml"
274 xpointer="xpointer(//*[@os='m'])"/>
275
276 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
277 href="adjusting.xml"
278 xpointer="xpointer(//*[@os='n'])"/>
279
280 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
281 href="adjusting.xml"
282 xpointer="xpointer(//*[@os='o'])"/>
283
284 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
285 href="adjusting.xml"
286 xpointer="xpointer(//*[@os='p'])"/>
287
288 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
289 href="adjusting.xml"
290 xpointer="xpointer(//*[@os='q'])"/>
291
292 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
293 href="adjusting.xml"
294 xpointer="xpointer(//*[@os='r'])"/>
295
296 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
297 href="adjusting.xml"
298 xpointer="xpointer(//*[@os='s'])"/>
299
300 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
301 href="adjusting.xml"
302 xpointer="xpointer(//*[@os='t'])"/>
303
304 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
305 href="adjusting.xml"
306 xpointer="xpointer(//*[@os='u'])"/>
307
308 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
309 href="adjusting.xml"
310 xpointer="xpointer(//*[@os='v'])"/>
311
312 <para>Finally, move a misplaced file:</para>
313
314<screen><userinput remap="install">mkdir -pv /usr/share/gdb/auto-load/usr/lib
315mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib</userinput></screen>
316
317 </sect2>
318
319 <sect2 id="contents-gcc" role="content">
320 <title>Contents of GCC</title>
321
322 <segmentedlist>
323 <segtitle>Installed programs</segtitle>
324 <segtitle>Installed libraries</segtitle>
325 <segtitle>Installed directories</segtitle>
326
327 <seglistitem>
328 <seg>c++, cc (link to gcc), cpp, g++, gcc,
329 gcc-ar, gcc-nm, gcc-ranlib, gcov, gcov-dump, and gcov-tool</seg>
330
331 <seg>libasan.{a,so}, libatomic.{a,so}, libcc1.so, libgcc.a, libgcc_eh.a,
332 libgcc_s.so, libgcov.a, libgomp.{a,so}, libitm.{a,so},
333 liblsan.{a,so}, liblto_plugin.so,
334 libquadmath.{a,so}, libssp.{a,so}, libssp_nonshared.a,
335 libstdc++.{a,so}, libstdc++fs.a, libsupc++.a, libtsan.{a,so},
336 and libubsan.{a,so}</seg>
337
338 <seg>/usr/include/c++, /usr/lib/gcc, /usr/libexec/gcc, and
339 /usr/share/gcc-&gcc-version;</seg>
340 </seglistitem>
341 </segmentedlist>
342
343 <variablelist>
344 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
345 <?dbfo list-presentation="list"?>
346 <?dbhtml list-presentation="table"?>
347
348 <varlistentry id="c">
349 <term><command>c++</command></term>
350 <listitem>
351 <para>The C++ compiler</para>
352 <indexterm zone="ch-system-gcc c">
353 <primary sortas="b-c++">c++</primary>
354 </indexterm>
355 </listitem>
356 </varlistentry>
357
358 <varlistentry id="cc">
359 <term><command>cc</command></term>
360 <listitem>
361 <para>The C compiler</para>
362 <indexterm zone="ch-system-gcc cc">
363 <primary sortas="b-cc">cc</primary>
364 </indexterm>
365 </listitem>
366 </varlistentry>
367
368 <varlistentry id="cpp">
369 <term><command>cpp</command></term>
370 <listitem>
371 <para>The C preprocessor; it is used by the compiler to expand the
372 #include, #define, and similar statements in the source files</para>
373 <indexterm zone="ch-system-gcc cpp">
374 <primary sortas="b-cpp">cpp</primary>
375 </indexterm>
376 </listitem>
377 </varlistentry>
378
379 <varlistentry id="g">
380 <term><command>g++</command></term>
381 <listitem>
382 <para>The C++ compiler</para>
383 <indexterm zone="ch-system-gcc g">
384 <primary sortas="b-g++">g++</primary>
385 </indexterm>
386 </listitem>
387 </varlistentry>
388
389 <varlistentry id="gcc">
390 <term><command>gcc</command></term>
391 <listitem>
392 <para>The C compiler</para>
393 <indexterm zone="ch-system-gcc gcc">
394 <primary sortas="b-gcc">gcc</primary>
395 </indexterm>
396 </listitem>
397 </varlistentry>
398
399 <varlistentry id="gcc-ar">
400 <term><command>gcc-ar</command></term>
401 <listitem>
402 <para>A wrapper around <command>ar</command> that adds a
403 plugin to the command line. This program is only used
404 to add "link time optimization" and is not useful with the
405 default build options</para>
406 <indexterm zone="ch-system-gcc gcc-ar">
407 <primary sortas="b-gcc-ar">gc-ar</primary>
408 </indexterm>
409 </listitem>
410 </varlistentry>
411
412 <varlistentry id="gcc-nm">
413 <term><command>gcc-nm</command></term>
414 <listitem>
415 <para>A wrapper around <command>nm</command> that adds a
416 plugin to the command line. This program is only used
417 to add "link time optimization" and is not useful with the
418 default build options</para>
419 <indexterm zone="ch-system-gcc gcc-nm">
420 <primary sortas="b-gcc-nm">gc-nm</primary>
421 </indexterm>
422 </listitem>
423 </varlistentry>
424
425 <varlistentry id="gcc-ranlib">
426 <term><command>gcc-ranlib</command></term>
427 <listitem>
428 <para>A wrapper around <command>ranlib</command> that adds a
429 plugin to the command line. This program is only used
430 to add "link time optimization" and is not useful with the
431 default build options</para>
432 <indexterm zone="ch-system-gcc gcc-ranlib">
433 <primary sortas="b-gcc-ranlib">gc-ranlib</primary>
434 </indexterm>
435 </listitem>
436 </varlistentry>
437
438 <varlistentry id="gcov">
439 <term><command>gcov</command></term>
440 <listitem>
441 <para>A coverage testing tool; it is used to analyze programs to
442 determine where optimizations will have the most effect</para>
443 <indexterm zone="ch-system-gcc gcov">
444 <primary sortas="b-gcov">gcov</primary>
445 </indexterm>
446 </listitem>
447 </varlistentry>
448
449 <varlistentry id="gcov-dump">
450 <term><command>gcov-dump</command></term>
451 <listitem>
452 <para>Offline gcda and gcno profile dump tool</para>
453 <indexterm zone="ch-system-gcc gcov-dump">
454 <primary sortas="b-gcov-dump">gcov-dump</primary>
455 </indexterm>
456 </listitem>
457 </varlistentry>
458
459 <varlistentry id="gcov-tool">
460 <term><command>gcov-tool</command></term>
461 <listitem>
462 <para>Offline gcda profile processing tool</para>
463 <indexterm zone="ch-system-gcc gcov-tool">
464 <primary sortas="b-gcov-tool">gcov-tool</primary>
465 </indexterm>
466 </listitem>
467 </varlistentry>
468
469 <varlistentry id="libasan">
470 <term><filename class="libraryfile">libasan</filename></term>
471 <listitem>
472 <para>The Address Sanitizer runtime library</para>
473 <indexterm zone="ch-system-gcc libasan">
474 <primary sortas="b-libasan">libasan</primary>
475 </indexterm>
476 </listitem>
477 </varlistentry>
478
479 <varlistentry id="libatomic">
480 <term><filename class="libraryfile">libatomic</filename></term>
481 <listitem>
482 <para>GCC atomic built-in runtime library</para>
483 <indexterm zone="ch-system-gcc libatomic">
484 <primary sortas="b-libatomic">libatomic</primary>
485 </indexterm>
486 </listitem>
487 </varlistentry>
488
489 <varlistentry id="libcc1">
490 <term><filename class="libraryfile">libcc1</filename></term>
491 <listitem>
492 <para>The C preprocessing library</para>
493 <indexterm zone="ch-system-gcc libcc1">
494 <primary sortas="b-libcc1">libcc1</primary>
495 </indexterm>
496 </listitem>
497 </varlistentry>
498
499 <varlistentry id="libgcc">
500 <term><filename class="libraryfile">libgcc</filename></term>
501 <listitem>
502 <para>Contains run-time support for <command>gcc</command></para>
503 <indexterm zone="ch-system-gcc libgcc">
504 <primary sortas="c-libgcc">libgcc</primary>
505 </indexterm>
506 </listitem>
507 </varlistentry>
508
509 <varlistentry id="libgcov">
510 <term><filename class="libraryfile">libgcov</filename></term>
511 <listitem>
512 <para>This library is linked in to a program when GCC is instructed
513 to enable profiling</para>
514 <indexterm zone="ch-system-gcc libgcov">
515 <primary sortas="c-libgcov">libgcov</primary>
516 </indexterm>
517 </listitem>
518 </varlistentry>
519
520 <varlistentry id="libgomp">
521 <term><filename class="libraryfile">libgomp</filename></term>
522 <listitem>
523 <para>GNU implementation of the OpenMP API for multi-platform
524 shared-memory parallel programming in C/C++ and Fortran</para>
525 <indexterm zone="ch-system-gcc libgomp">
526 <primary sortas="c-libgomp">libgomp</primary>
527 </indexterm>
528 </listitem>
529 </varlistentry>
530
531 <varlistentry id="liblsan">
532 <term><filename class="libraryfile">liblsan</filename></term>
533 <listitem>
534 <para>The Leak Sanitizer runtime library</para>
535 <indexterm zone="ch-system-gcc liblsan">
536 <primary sortas="c-liblsan">liblsan</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
541 <varlistentry id="liblto_plugin">
542 <term><filename class="libraryfile">liblto_plugin</filename></term>
543 <listitem>
544 <para>GCC's Link Time Optimization (LTO) plugin allows GCC to perform
545 optimizations across compilation units</para>
546 <indexterm zone="ch-system-gcc liblto_plugin">
547 <primary sortas="c-liblto_plugin">liblto_plugin</primary>
548 </indexterm>
549 </listitem>
550 </varlistentry>
551
552 <varlistentry id="libquadmath">
553 <term><filename class="libraryfile">libquadmath</filename></term>
554 <listitem>
555 <para>GCC Quad Precision Math Library API</para>
556 <indexterm zone="ch-system-gcc libquadmath">
557 <primary sortas="c-libquadmath">libquadmath</primary>
558 </indexterm>
559 </listitem>
560 </varlistentry>
561
562 <varlistentry id="libssp">
563 <term><filename class="libraryfile">libssp</filename></term>
564 <listitem>
565 <para>Contains routines supporting GCC's stack-smashing protection
566 functionality</para>
567 <indexterm zone="ch-system-gcc libssp">
568 <primary sortas="c-libssp">libssp</primary>
569 </indexterm>
570 </listitem>
571 </varlistentry>
572
573 <varlistentry id="libstdc">
574 <term><filename class="libraryfile">libstdc++</filename></term>
575 <listitem>
576 <para>The standard C++ library</para>
577 <indexterm zone="ch-system-gcc libstdc">
578 <primary sortas="c-libstdc++">libstdc++</primary>
579 </indexterm>
580 </listitem>
581 </varlistentry>
582
583 <varlistentry id="libstdcfs">
584 <term><filename class="libraryfile">libstdc++fs</filename></term>
585 <listitem>
586 <para>ISO/IEC TS 18822:2015 Filesystem library</para>
587 <indexterm zone="ch-system-gcc libstdcfs">
588 <primary sortas="c-libstdc++fs">libstdc++fs</primary>
589 </indexterm>
590 </listitem>
591 </varlistentry>
592
593 <varlistentry id="libsupc">
594 <term><filename class="libraryfile">libsupc++</filename></term>
595 <listitem>
596 <para>Provides supporting routines for the C++ programming
597 language</para>
598 <indexterm zone="ch-system-gcc libsupc">
599 <primary sortas="c-libsupc++">libsupc++</primary>
600 </indexterm>
601 </listitem>
602 </varlistentry>
603
604 <varlistentry id="libtsan">
605 <term><filename class="libraryfile">libtsan</filename></term>
606 <listitem>
607 <para>The Thread Sanitizer runtime library</para>
608 <indexterm zone="ch-system-gcc libtsan">
609 <primary sortas="c-libtsan">libtsan</primary>
610 </indexterm>
611 </listitem>
612 </varlistentry>
613
614 <varlistentry id="libubsan">
615 <term><filename class="libraryfile">libubsan</filename></term>
616 <listitem>
617 <para>The Undefined Behavior Sanitizer runtime library</para>
618 <indexterm zone="ch-system-gcc libubsan">
619 <primary sortas="c-libubsan">libubsan</primary>
620 </indexterm>
621 </listitem>
622 </varlistentry>
623
624 </variablelist>
625
626 </sect2>
627
628</sect1>
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