source: chapter06/gcc.xml@ ac95fdb

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Last change on this file since ac95fdb was ac95fdb, checked in by Xi Ruoyao <xry111@…>, 5 years ago

Clean up GCC page for MPX removal

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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">SED=sed \
62../configure --prefix=/usr \
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 parameters:</title>
75
76 <varlistentry>
77 <term><envar>SED=sed</envar></term>
78 <listitem>
79 <para>Setting this environment variable prevents a hard-coded
80 path to /tools/bin/sed.</para>
81 </listitem>
82 </varlistentry>
83 <!--
84 <varlistentry>
85 <term><parameter>- -disable-libmpx</parameter></term>
86 <listitem>
87 <para>This switch tells GCC to not build mpx (Memory Protection
88 Extensions) that can cause problems on some processors. It has
89 been removed from the next version of gcc.</para>
90 </listitem>
91 </varlistentry>
92 -->
93 <varlistentry>
94 <term><parameter>--with-system-zlib</parameter></term>
95 <listitem>
96 <para>This switch tells GCC to link to the system installed copy of
97 the Zlib library, rather than its own internal copy.</para>
98 </listitem>
99 </varlistentry>
100 </variablelist>
101
102 <para>Compile the package:</para>
103
104<screen><userinput remap="make">make</userinput></screen>
105
106 <important>
107 <para>In this section, the test suite for GCC is considered
108 critical. Do not skip it under any circumstance.</para>
109 </important>
110
111 <para>One set of tests in the GCC test suite is known to exhaust the stack,
112 so increase the stack size prior to running the tests:</para>
113
114<screen><userinput remap="test">ulimit -s 32768</userinput></screen>
115
116 <para>Test the results as a non-privileged user, but do not stop at errors:</para>
117
118<screen><userinput remap="test">chown -Rv nobody .
119su nobody -s /bin/bash -c "PATH=$PATH make -k check"</userinput></screen>
120
121 <para>To receive a summary of the test suite results, run:</para>
122
123<screen><userinput remap="test">../contrib/test_summary</userinput></screen>
124
125 <para>For only the summaries, pipe the output through
126 <userinput>grep -A7 Summ</userinput>.</para>
127
128 <para>Results can be compared with those located at <ulink
129 url="&test-results;"/> and
130 <ulink url="https://gcc.gnu.org/ml/gcc-testresults/"/>.</para>
131
132 <para>Six tests related to get_time are known to fail. These are
133 apparantly related to the en_HK locale.</para>
134
135 <para>Two tests named lookup.cc and reverse.cc in experimental/net
136 are known to fail in LFS chroot environment because they require
137 /etc/hosts and iana-etc.</para>
138
139 <para>Two tests named pr57193.c and pr90178.c are known to fail.</para>
140
141 <para>A few unexpected failures cannot always be avoided. The GCC developers
142 are usually aware of these issues, but have not resolved them yet.
143 Unless the test results are vastly different from those at the above URL,
144 it is safe to continue.</para>
145
146 <!--note><para>
147 On some combinations of kernel configuration and AMD processors
148 there may be more than 1100 failures in the gcc.target/i386/mpx
149 tests (which are designed to test the MPX option on recent
150 Intel processors). These can safely be ignored on AMD
151 processors. These tests will also fail on Intel processors if MPX support
152 is not enabled in the kernel even though it is present on the CPU.
153 </para></note-->
154
155 <para>Install the package:</para>
156
157<screen><userinput remap="install">make install</userinput></screen>
158
159 <para>Create a symlink required by the <ulink
160 url="https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch03s09.html">FHS</ulink>
161 for "historical" reasons.</para>
162
163<screen><userinput remap="install">ln -sv ../usr/bin/cpp /lib</userinput></screen>
164
165 <para>Many packages use the name <command>cc</command> to call the C
166 compiler. To satisfy those packages, create a symlink:</para>
167
168<screen><userinput remap="install">ln -sv gcc /usr/bin/cc</userinput></screen>
169
170 <para>Add a compatibility symlink to enable building programs with
171 Link Time Optimization (LTO):</para>
172
173<screen><userinput remap="install">install -v -dm755 /usr/lib/bfd-plugins
174ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/&gcc-version;/liblto_plugin.so \
175 /usr/lib/bfd-plugins/</userinput></screen>
176
177 <para>Now that our final toolchain is in place, it is important to again ensure
178 that compiling and linking will work as expected. We do this by performing
179 the same sanity checks as we did earlier in the chapter:</para>
180
181 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
182 href="adjusting.xml"
183 xpointer="xpointer(//*[@os='a'])"/>
184
185 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
186 href="adjusting.xml"
187 xpointer="xpointer(//*[@os='b'])"/>
188
189 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
190 href="adjusting.xml"
191 xpointer="xpointer(//*[@os='c'])"/>
192
193 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
194 href="adjusting.xml"
195 xpointer="xpointer(//*[@os='d'])"/>
196
197 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
198 href="adjusting.xml"
199 xpointer="xpointer(//*[@os='e'])"/>
200
201 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
202 href="adjusting.xml"
203 xpointer="xpointer(//*[@os='f'])"/>
204
205<screen><computeroutput>/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crt1.o succeeded
206/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crti.o succeeded
207/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crtn.o succeeded</computeroutput></screen>
208
209 <para>Depending on your machine architecture, the above may differ slightly,
210 the difference usually being the name of the directory
211 after <filename class="directory">/usr/lib/gcc</filename>. The important
212 thing to look for here is that <command>gcc</command> has found all three
213 <filename>crt*.o</filename> files under the
214 <filename class="directory">/usr/lib</filename> directory.</para>
215
216 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
217 href="adjusting.xml"
218 xpointer="xpointer(//*[@os='g'])"/>
219
220<screen><userinput>grep -B4 '^ /usr/include' dummy.log</userinput></screen>
221
222 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
223 href="adjusting.xml"
224 xpointer="xpointer(//*[@os='h'])"/>
225
226<screen><computeroutput>#include &lt;...&gt; search starts here:
227 /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include
228 /usr/local/include
229 /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include-fixed
230 /usr/include</computeroutput></screen>
231
232 <para>Again, note that the directory named after your target triplet may be
233 different than the above, depending on your architecture.</para>
234
235<!-- This appears to be obsolete
236
237 <note><para>As of version 4.3.0, GCC now unconditionally installs the
238 <filename>limits.h</filename> file into the private
239 <filename class="directory">include-fixed</filename> directory, and that
240 directory is required to be in place.</para></note>
241-->
242
243 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
244 href="adjusting.xml"
245 xpointer="xpointer(//*[@os='i'])"/>
246
247 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
248 href="adjusting.xml"
249 xpointer="xpointer(//*[@os='j'])"/>
250
251 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
252 href="adjusting.xml"
253 xpointer="xpointer(//*[@os='k'])"/>
254
255<screen><computeroutput>SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib64")
256SEARCH_DIR("/usr/local/lib64")
257SEARCH_DIR("/lib64")
258SEARCH_DIR("/usr/lib64")
259SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib")
260SEARCH_DIR("/usr/local/lib")
261SEARCH_DIR("/lib")
262SEARCH_DIR("/usr/lib");</computeroutput></screen>
263
264 <para>A 32-bit system may see a few different directories. For example, here
265 is the output from an i686 machine:</para>
266
267<screen><computeroutput>SEARCH_DIR("/usr/i686-pc-linux-gnu/lib32")
268SEARCH_DIR("/usr/local/lib32")
269SEARCH_DIR("/lib32")
270SEARCH_DIR("/usr/lib32")
271SEARCH_DIR("/usr/i686-pc-linux-gnu/lib")
272SEARCH_DIR("/usr/local/lib")
273SEARCH_DIR("/lib")
274SEARCH_DIR("/usr/lib");</computeroutput></screen>
275
276 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
277 href="adjusting.xml"
278 xpointer="xpointer(//*[@os='l'])"/>
279
280 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
281 href="adjusting.xml"
282 xpointer="xpointer(//*[@os='m'])"/>
283
284 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
285 href="adjusting.xml"
286 xpointer="xpointer(//*[@os='n'])"/>
287
288 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
289 href="adjusting.xml"
290 xpointer="xpointer(//*[@os='o'])"/>
291
292 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
293 href="adjusting.xml"
294 xpointer="xpointer(//*[@os='p'])"/>
295
296 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
297 href="adjusting.xml"
298 xpointer="xpointer(//*[@os='q'])"/>
299
300 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
301 href="adjusting.xml"
302 xpointer="xpointer(//*[@os='r'])"/>
303
304 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
305 href="adjusting.xml"
306 xpointer="xpointer(//*[@os='s'])"/>
307
308 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
309 href="adjusting.xml"
310 xpointer="xpointer(//*[@os='t'])"/>
311
312 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
313 href="adjusting.xml"
314 xpointer="xpointer(//*[@os='u'])"/>
315
316 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
317 href="adjusting.xml"
318 xpointer="xpointer(//*[@os='v'])"/>
319
320 <para>Finally, move a misplaced file:</para>
321
322<screen><userinput remap="install">mkdir -pv /usr/share/gdb/auto-load/usr/lib
323mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib</userinput></screen>
324
325 </sect2>
326
327 <sect2 id="contents-gcc" role="content">
328 <title>Contents of GCC</title>
329
330 <segmentedlist>
331 <segtitle>Installed programs</segtitle>
332 <segtitle>Installed libraries</segtitle>
333 <segtitle>Installed directories</segtitle>
334
335 <seglistitem>
336 <seg>c++, cc (link to gcc), cpp, g++, gcc,
337 gcc-ar, gcc-nm, gcc-ranlib, gcov, gcov-dump, and gcov-tool</seg>
338
339 <seg>libasan.{a,so}, libatomic.{a,so}, libcc1.so, libgcc.a, libgcc_eh.a,
340 libgcc_s.so, libgcov.a, libgomp.{a,so}, libitm.{a,so},
341 liblsan.{a,so}, liblto_plugin.so,
342 libquadmath.{a,so}, libssp.{a,so}, libssp_nonshared.a,
343 libstdc++.{a,so}, libstdc++fs.a, libsupc++.a, libtsan.{a,so},
344 and libubsan.{a,so}</seg>
345
346 <seg>/usr/include/c++, /usr/lib/gcc, /usr/libexec/gcc, and
347 /usr/share/gcc-&gcc-version;</seg>
348 </seglistitem>
349 </segmentedlist>
350
351 <variablelist>
352 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
353 <?dbfo list-presentation="list"?>
354 <?dbhtml list-presentation="table"?>
355
356 <varlistentry id="c">
357 <term><command>c++</command></term>
358 <listitem>
359 <para>The C++ compiler</para>
360 <indexterm zone="ch-system-gcc c">
361 <primary sortas="b-c++">c++</primary>
362 </indexterm>
363 </listitem>
364 </varlistentry>
365
366 <varlistentry id="cc">
367 <term><command>cc</command></term>
368 <listitem>
369 <para>The C compiler</para>
370 <indexterm zone="ch-system-gcc cc">
371 <primary sortas="b-cc">cc</primary>
372 </indexterm>
373 </listitem>
374 </varlistentry>
375
376 <varlistentry id="cpp">
377 <term><command>cpp</command></term>
378 <listitem>
379 <para>The C preprocessor; it is used by the compiler to expand the
380 #include, #define, and similar statements in the source files</para>
381 <indexterm zone="ch-system-gcc cpp">
382 <primary sortas="b-cpp">cpp</primary>
383 </indexterm>
384 </listitem>
385 </varlistentry>
386
387 <varlistentry id="g">
388 <term><command>g++</command></term>
389 <listitem>
390 <para>The C++ compiler</para>
391 <indexterm zone="ch-system-gcc g">
392 <primary sortas="b-g++">g++</primary>
393 </indexterm>
394 </listitem>
395 </varlistentry>
396
397 <varlistentry id="gcc">
398 <term><command>gcc</command></term>
399 <listitem>
400 <para>The C compiler</para>
401 <indexterm zone="ch-system-gcc gcc">
402 <primary sortas="b-gcc">gcc</primary>
403 </indexterm>
404 </listitem>
405 </varlistentry>
406
407 <varlistentry id="gcc-ar">
408 <term><command>gcc-ar</command></term>
409 <listitem>
410 <para>A wrapper around <command>ar</command> that adds a
411 plugin to the command line. This program is only used
412 to add "link time optimization" and is not useful with the
413 default build options</para>
414 <indexterm zone="ch-system-gcc gcc-ar">
415 <primary sortas="b-gcc-ar">gc-ar</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 <varlistentry id="gcc-nm">
421 <term><command>gcc-nm</command></term>
422 <listitem>
423 <para>A wrapper around <command>nm</command> that adds a
424 plugin to the command line. This program is only used
425 to add "link time optimization" and is not useful with the
426 default build options</para>
427 <indexterm zone="ch-system-gcc gcc-nm">
428 <primary sortas="b-gcc-nm">gc-nm</primary>
429 </indexterm>
430 </listitem>
431 </varlistentry>
432
433 <varlistentry id="gcc-ranlib">
434 <term><command>gcc-ranlib</command></term>
435 <listitem>
436 <para>A wrapper around <command>ranlib</command> that adds a
437 plugin to the command line. This program is only used
438 to add "link time optimization" and is not useful with the
439 default build options</para>
440 <indexterm zone="ch-system-gcc gcc-ranlib">
441 <primary sortas="b-gcc-ranlib">gc-ranlib</primary>
442 </indexterm>
443 </listitem>
444 </varlistentry>
445
446 <varlistentry id="gcov">
447 <term><command>gcov</command></term>
448 <listitem>
449 <para>A coverage testing tool; it is used to analyze programs to
450 determine where optimizations will have the most effect</para>
451 <indexterm zone="ch-system-gcc gcov">
452 <primary sortas="b-gcov">gcov</primary>
453 </indexterm>
454 </listitem>
455 </varlistentry>
456
457 <varlistentry id="gcov-dump">
458 <term><command>gcov-dump</command></term>
459 <listitem>
460 <para>Offline gcda and gcno profile dump tool</para>
461 <indexterm zone="ch-system-gcc gcov-dump">
462 <primary sortas="b-gcov-dump">gcov-dump</primary>
463 </indexterm>
464 </listitem>
465 </varlistentry>
466
467 <varlistentry id="gcov-tool">
468 <term><command>gcov-tool</command></term>
469 <listitem>
470 <para>Offline gcda profile processing tool</para>
471 <indexterm zone="ch-system-gcc gcov-tool">
472 <primary sortas="b-gcov-tool">gcov-tool</primary>
473 </indexterm>
474 </listitem>
475 </varlistentry>
476
477 <varlistentry id="libasan">
478 <term><filename class="libraryfile">libasan</filename></term>
479 <listitem>
480 <para>The Address Sanitizer runtime library</para>
481 <indexterm zone="ch-system-gcc libasan">
482 <primary sortas="b-libasan">libasan</primary>
483 </indexterm>
484 </listitem>
485 </varlistentry>
486
487 <varlistentry id="libatomic">
488 <term><filename class="libraryfile">libatomic</filename></term>
489 <listitem>
490 <para>GCC atomic built-in runtime library</para>
491 <indexterm zone="ch-system-gcc libatomic">
492 <primary sortas="b-libatomic">libatomic</primary>
493 </indexterm>
494 </listitem>
495 </varlistentry>
496
497 <varlistentry id="libcc1">
498 <term><filename class="libraryfile">libcc1</filename></term>
499 <listitem>
500 <para>The C preprocessing library</para>
501 <indexterm zone="ch-system-gcc libcc1">
502 <primary sortas="b-libcc1">libcc1</primary>
503 </indexterm>
504 </listitem>
505 </varlistentry>
506
507 <varlistentry id="libgcc">
508 <term><filename class="libraryfile">libgcc</filename></term>
509 <listitem>
510 <para>Contains run-time support for <command>gcc</command></para>
511 <indexterm zone="ch-system-gcc libgcc">
512 <primary sortas="c-libgcc">libgcc</primary>
513 </indexterm>
514 </listitem>
515 </varlistentry>
516
517 <varlistentry id="libgcov">
518 <term><filename class="libraryfile">libgcov</filename></term>
519 <listitem>
520 <para>This library is linked in to a program when GCC is instructed
521 to enable profiling</para>
522 <indexterm zone="ch-system-gcc libgcov">
523 <primary sortas="c-libgcov">libgcov</primary>
524 </indexterm>
525 </listitem>
526 </varlistentry>
527
528 <varlistentry id="libgomp">
529 <term><filename class="libraryfile">libgomp</filename></term>
530 <listitem>
531 <para>GNU implementation of the OpenMP API for multi-platform
532 shared-memory parallel programming in C/C++ and Fortran</para>
533 <indexterm zone="ch-system-gcc libgomp">
534 <primary sortas="c-libgomp">libgomp</primary>
535 </indexterm>
536 </listitem>
537 </varlistentry>
538
539 <varlistentry id="liblsan">
540 <term><filename class="libraryfile">liblsan</filename></term>
541 <listitem>
542 <para>The Leak Sanitizer runtime library</para>
543 <indexterm zone="ch-system-gcc liblsan">
544 <primary sortas="c-liblsan">liblsan</primary>
545 </indexterm>
546 </listitem>
547 </varlistentry>
548
549 <varlistentry id="liblto_plugin">
550 <term><filename class="libraryfile">liblto_plugin</filename></term>
551 <listitem>
552 <para>GCC's Link Time Optimization (LTO) plugin allows GCC to perform
553 optimizations across compilation units</para>
554 <indexterm zone="ch-system-gcc liblto_plugin">
555 <primary sortas="c-liblto_plugin">liblto_plugin</primary>
556 </indexterm>
557 </listitem>
558 </varlistentry>
559
560 <varlistentry id="libquadmath">
561 <term><filename class="libraryfile">libquadmath</filename></term>
562 <listitem>
563 <para>GCC Quad Precision Math Library API</para>
564 <indexterm zone="ch-system-gcc libquadmath">
565 <primary sortas="c-libquadmath">libquadmath</primary>
566 </indexterm>
567 </listitem>
568 </varlistentry>
569
570 <varlistentry id="libssp">
571 <term><filename class="libraryfile">libssp</filename></term>
572 <listitem>
573 <para>Contains routines supporting GCC's stack-smashing protection
574 functionality</para>
575 <indexterm zone="ch-system-gcc libssp">
576 <primary sortas="c-libssp">libssp</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
581 <varlistentry id="libstdc">
582 <term><filename class="libraryfile">libstdc++</filename></term>
583 <listitem>
584 <para>The standard C++ library</para>
585 <indexterm zone="ch-system-gcc libstdc">
586 <primary sortas="c-libstdc++">libstdc++</primary>
587 </indexterm>
588 </listitem>
589 </varlistentry>
590
591 <varlistentry id="libstdcfs">
592 <term><filename class="libraryfile">libstdc++fs</filename></term>
593 <listitem>
594 <para>ISO/IEC TS 18822:2015 Filesystem library</para>
595 <indexterm zone="ch-system-gcc libstdcfs">
596 <primary sortas="c-libstdc++fs">libstdc++fs</primary>
597 </indexterm>
598 </listitem>
599 </varlistentry>
600
601 <varlistentry id="libsupc">
602 <term><filename class="libraryfile">libsupc++</filename></term>
603 <listitem>
604 <para>Provides supporting routines for the C++ programming
605 language</para>
606 <indexterm zone="ch-system-gcc libsupc">
607 <primary sortas="c-libsupc++">libsupc++</primary>
608 </indexterm>
609 </listitem>
610 </varlistentry>
611
612 <varlistentry id="libtsan">
613 <term><filename class="libraryfile">libtsan</filename></term>
614 <listitem>
615 <para>The Thread Sanitizer runtime library</para>
616 <indexterm zone="ch-system-gcc libtsan">
617 <primary sortas="c-libtsan">libtsan</primary>
618 </indexterm>
619 </listitem>
620 </varlistentry>
621
622 <varlistentry id="libubsan">
623 <term><filename class="libraryfile">libubsan</filename></term>
624 <listitem>
625 <para>The Undefined Behavior Sanitizer runtime library</para>
626 <indexterm zone="ch-system-gcc libubsan">
627 <primary sortas="c-libubsan">libubsan</primary>
628 </indexterm>
629 </listitem>
630 </varlistentry>
631
632 </variablelist>
633
634 </sect2>
635
636</sect1>
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