source: chapter08/gcc.xml@ 6a156bab

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Last change on this file since 6a156bab was 6a156bab, checked in by Bruce Dubbs <bdubbs@…>, 18 months ago

Mostly text updates in Chapter 8.
There are a couple of minor command changes.

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