source: chapter06/gcc.xml@ 015473e7

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Last change on this file since 015473e7 was 015473e7, checked in by Xi Ruoyao <xry111@…>, 5 years ago

Remove a command no more needed in gcc

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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 --disable-libmpx \
67 --with-system-zlib</userinput></screen>
68
69 <para>Note that for other languages, there are some prerequisites that
70 are not yet available. See the
71 <ulink url="&blfs-book;general/gcc.html">BLFS Book</ulink>
72 for instructions on how to build all of GCC's supported languages.</para>
73
74 <variablelist>
75 <title>The meaning of the new configure parameters:</title>
76
77 <varlistentry>
78 <term><envar>SED=sed</envar></term>
79 <listitem>
80 <para>Setting this environment variable prevents a hard-coded
81 path to /tools/bin/sed.</para>
82 </listitem>
83 </varlistentry>
84
85 <varlistentry>
86 <term><parameter>--disable-libmpx</parameter></term>
87 <listitem>
88 <para>This switch tells GCC to not build mpx (Memory Protection
89 Extensions) that can cause problems on some processors. It has
90 been removed from the next version of gcc.</para>
91 </listitem>
92 </varlistentry>
93
94 <varlistentry>
95 <term><parameter>--with-system-zlib</parameter></term>
96 <listitem>
97 <para>This switch tells GCC to link to the system installed copy of
98 the Zlib library, rather than its own internal copy.</para>
99 </listitem>
100 </varlistentry>
101 </variablelist>
102
103 <para>Compile the package:</para>
104
105<screen><userinput remap="make">make</userinput></screen>
106
107 <important>
108 <para>In this section, the test suite for GCC is considered
109 critical. Do not skip it under any circumstance.</para>
110 </important>
111
112 <para>One set of tests in the GCC test suite is known to exhaust the stack,
113 so increase the stack size prior to running the tests:</para>
114
115<screen><userinput remap="test">ulimit -s 32768</userinput></screen>
116
117 <para>Remove one test known to cause a problem:</para>
118
119<screen><userinput remap="test">rm ../gcc/testsuite/g++.dg/pr83239.C</userinput></screen>
120
121 <para>Test the results as a non-privileged user, but do not stop at errors:</para>
122
123<screen><userinput remap="test">chown -Rv nobody .
124su nobody -s /bin/bash -c "PATH=$PATH make -k check"</userinput></screen>
125
126 <para>To receive a summary of the test suite results, run:</para>
127
128<screen><userinput remap="test">../contrib/test_summary</userinput></screen>
129
130 <para>For only the summaries, pipe the output through
131 <userinput>grep -A7 Summ</userinput>.</para>
132
133 <para>Results can be compared with those located at <ulink
134 url="&test-results;"/> and
135 <ulink url="https://gcc.gnu.org/ml/gcc-testresults/"/>.</para>
136
137 <para>Six tests related to get_time are known to fail. These are
138 apparantly related to the en_HK locale.</para>
139
140 <para>A few unexpected failures cannot always be avoided. The GCC developers
141 are usually aware of these issues, but have not resolved them yet.
142 Unless the test results are vastly different from those at the above URL,
143 it is safe to continue.</para>
144
145 <note><para>
146 On some combinations of kernel configuration and AMD processors
147 there may be more than 1100 failures in the gcc.target/i386/mpx
148 tests (which are designed to test the MPX option on recent
149 Intel processors). These can safely be ignored on AMD
150 processors. These tests will also fail on Intel processors if MPX support
151 is not enabled in the kernel even though it is present on the CPU.
152 </para></note>
153
154 <para>Install the package:</para>
155
156<screen><userinput remap="install">make install</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
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 the same sanity checks as we did earlier in the chapter:</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 usually being 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, note that the directory named after your target triplet may be
232 different than the above, depending on your architecture.</para>
233
234<!-- This appears to be obsolete
235
236 <note><para>As of version 4.3.0, GCC now unconditionally installs the
237 <filename>limits.h</filename> file into the private
238 <filename class="directory">include-fixed</filename> directory, and that
239 directory is required to be in place.</para></note>
240-->
241
242 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
243 href="adjusting.xml"
244 xpointer="xpointer(//*[@os='i'])"/>
245
246 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
247 href="adjusting.xml"
248 xpointer="xpointer(//*[@os='j'])"/>
249
250 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
251 href="adjusting.xml"
252 xpointer="xpointer(//*[@os='k'])"/>
253
254<screen><computeroutput>SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib64")
255SEARCH_DIR("/usr/local/lib64")
256SEARCH_DIR("/lib64")
257SEARCH_DIR("/usr/lib64")
258SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib")
259SEARCH_DIR("/usr/local/lib")
260SEARCH_DIR("/lib")
261SEARCH_DIR("/usr/lib");</computeroutput></screen>
262
263 <para>A 32-bit system may see a few different directories. For example, here
264 is the output from an i686 machine:</para>
265
266<screen><computeroutput>SEARCH_DIR("/usr/i686-pc-linux-gnu/lib32")
267SEARCH_DIR("/usr/local/lib32")
268SEARCH_DIR("/lib32")
269SEARCH_DIR("/usr/lib32")
270SEARCH_DIR("/usr/i686-pc-linux-gnu/lib")
271SEARCH_DIR("/usr/local/lib")
272SEARCH_DIR("/lib")
273SEARCH_DIR("/usr/lib");</computeroutput></screen>
274
275 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
276 href="adjusting.xml"
277 xpointer="xpointer(//*[@os='l'])"/>
278
279 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
280 href="adjusting.xml"
281 xpointer="xpointer(//*[@os='m'])"/>
282
283 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
284 href="adjusting.xml"
285 xpointer="xpointer(//*[@os='n'])"/>
286
287 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
288 href="adjusting.xml"
289 xpointer="xpointer(//*[@os='o'])"/>
290
291 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
292 href="adjusting.xml"
293 xpointer="xpointer(//*[@os='p'])"/>
294
295 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
296 href="adjusting.xml"
297 xpointer="xpointer(//*[@os='q'])"/>
298
299 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
300 href="adjusting.xml"
301 xpointer="xpointer(//*[@os='r'])"/>
302
303 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
304 href="adjusting.xml"
305 xpointer="xpointer(//*[@os='s'])"/>
306
307 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
308 href="adjusting.xml"
309 xpointer="xpointer(//*[@os='t'])"/>
310
311 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
312 href="adjusting.xml"
313 xpointer="xpointer(//*[@os='u'])"/>
314
315 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
316 href="adjusting.xml"
317 xpointer="xpointer(//*[@os='v'])"/>
318
319 <para>Finally, move a misplaced file:</para>
320
321<screen><userinput remap="install">mkdir -pv /usr/share/gdb/auto-load/usr/lib
322mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib</userinput></screen>
323
324 </sect2>
325
326 <sect2 id="contents-gcc" role="content">
327 <title>Contents of GCC</title>
328
329 <segmentedlist>
330 <segtitle>Installed programs</segtitle>
331 <segtitle>Installed libraries</segtitle>
332 <segtitle>Installed directories</segtitle>
333
334 <seglistitem>
335 <seg>c++, cc (link to gcc), cpp, g++, gcc,
336 gcc-ar, gcc-nm, gcc-ranlib, gcov, gcov-dump, and gcov-tool</seg>
337
338 <seg>libasan.{a,so}, libatomic.{a,so}, libcc1.so, libgcc.a, libgcc_eh.a,
339 libgcc_s.so, libgcov.a, libgomp.{a,so}, libitm.{a,so},
340 liblsan.{a,so}, liblto_plugin.so,
341 libquadmath.{a,so}, libssp.{a,so}, libssp_nonshared.a,
342 libstdc++.{a,so}, libstdc++fs.a, libsupc++.a, libtsan.{a,so},
343 and libubsan.{a,so}</seg>
344
345 <seg>/usr/include/c++, /usr/lib/gcc, /usr/libexec/gcc, and
346 /usr/share/gcc-&gcc-version;</seg>
347 </seglistitem>
348 </segmentedlist>
349
350 <variablelist>
351 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
352 <?dbfo list-presentation="list"?>
353 <?dbhtml list-presentation="table"?>
354
355 <varlistentry id="c">
356 <term><command>c++</command></term>
357 <listitem>
358 <para>The C++ compiler</para>
359 <indexterm zone="ch-system-gcc c">
360 <primary sortas="b-c++">c++</primary>
361 </indexterm>
362 </listitem>
363 </varlistentry>
364
365 <varlistentry id="cc">
366 <term><command>cc</command></term>
367 <listitem>
368 <para>The C compiler</para>
369 <indexterm zone="ch-system-gcc cc">
370 <primary sortas="b-cc">cc</primary>
371 </indexterm>
372 </listitem>
373 </varlistentry>
374
375 <varlistentry id="cpp">
376 <term><command>cpp</command></term>
377 <listitem>
378 <para>The C preprocessor; it is used by the compiler to expand the
379 #include, #define, and similar statements in the source files</para>
380 <indexterm zone="ch-system-gcc cpp">
381 <primary sortas="b-cpp">cpp</primary>
382 </indexterm>
383 </listitem>
384 </varlistentry>
385
386 <varlistentry id="g">
387 <term><command>g++</command></term>
388 <listitem>
389 <para>The C++ compiler</para>
390 <indexterm zone="ch-system-gcc g">
391 <primary sortas="b-g++">g++</primary>
392 </indexterm>
393 </listitem>
394 </varlistentry>
395
396 <varlistentry id="gcc">
397 <term><command>gcc</command></term>
398 <listitem>
399 <para>The C compiler</para>
400 <indexterm zone="ch-system-gcc gcc">
401 <primary sortas="b-gcc">gcc</primary>
402 </indexterm>
403 </listitem>
404 </varlistentry>
405
406 <varlistentry id="gcc-ar">
407 <term><command>gcc-ar</command></term>
408 <listitem>
409 <para>A wrapper around <command>ar</command> that adds a
410 plugin to the command line. This program is only used
411 to add "link time optimization" and is not useful with the
412 default build options</para>
413 <indexterm zone="ch-system-gcc gcc-ar">
414 <primary sortas="b-gcc-ar">gc-ar</primary>
415 </indexterm>
416 </listitem>
417 </varlistentry>
418
419 <varlistentry id="gcc-nm">
420 <term><command>gcc-nm</command></term>
421 <listitem>
422 <para>A wrapper around <command>nm</command> that adds a
423 plugin to the command line. This program is only used
424 to add "link time optimization" and is not useful with the
425 default build options</para>
426 <indexterm zone="ch-system-gcc gcc-nm">
427 <primary sortas="b-gcc-nm">gc-nm</primary>
428 </indexterm>
429 </listitem>
430 </varlistentry>
431
432 <varlistentry id="gcc-ranlib">
433 <term><command>gcc-ranlib</command></term>
434 <listitem>
435 <para>A wrapper around <command>ranlib</command> that adds a
436 plugin to the command line. This program is only used
437 to add "link time optimization" and is not useful with the
438 default build options</para>
439 <indexterm zone="ch-system-gcc gcc-ranlib">
440 <primary sortas="b-gcc-ranlib">gc-ranlib</primary>
441 </indexterm>
442 </listitem>
443 </varlistentry>
444
445 <varlistentry id="gcov">
446 <term><command>gcov</command></term>
447 <listitem>
448 <para>A coverage testing tool; it is used to analyze programs to
449 determine where optimizations will have the most effect</para>
450 <indexterm zone="ch-system-gcc gcov">
451 <primary sortas="b-gcov">gcov</primary>
452 </indexterm>
453 </listitem>
454 </varlistentry>
455
456 <varlistentry id="gcov-dump">
457 <term><command>gcov-dump</command></term>
458 <listitem>
459 <para>Offline gcda and gcno profile dump tool</para>
460 <indexterm zone="ch-system-gcc gcov-dump">
461 <primary sortas="b-gcov-dump">gcov-dump</primary>
462 </indexterm>
463 </listitem>
464 </varlistentry>
465
466 <varlistentry id="gcov-tool">
467 <term><command>gcov-tool</command></term>
468 <listitem>
469 <para>Offline gcda profile processing tool</para>
470 <indexterm zone="ch-system-gcc gcov-tool">
471 <primary sortas="b-gcov-tool">gcov-tool</primary>
472 </indexterm>
473 </listitem>
474 </varlistentry>
475
476 <varlistentry id="libasan">
477 <term><filename class="libraryfile">libasan</filename></term>
478 <listitem>
479 <para>The Address Sanitizer runtime library</para>
480 <indexterm zone="ch-system-gcc libasan">
481 <primary sortas="b-libasan">libasan</primary>
482 </indexterm>
483 </listitem>
484 </varlistentry>
485
486 <varlistentry id="libatomic">
487 <term><filename class="libraryfile">libatomic</filename></term>
488 <listitem>
489 <para>GCC atomic built-in runtime library</para>
490 <indexterm zone="ch-system-gcc libatomic">
491 <primary sortas="b-libatomic">libatomic</primary>
492 </indexterm>
493 </listitem>
494 </varlistentry>
495
496 <varlistentry id="libcc1">
497 <term><filename class="libraryfile">libcc1</filename></term>
498 <listitem>
499 <para>The C preprocessing library</para>
500 <indexterm zone="ch-system-gcc libcc1">
501 <primary sortas="b-libcc1">libcc1</primary>
502 </indexterm>
503 </listitem>
504 </varlistentry>
505
506 <varlistentry id="libgcc">
507 <term><filename class="libraryfile">libgcc</filename></term>
508 <listitem>
509 <para>Contains run-time support for <command>gcc</command></para>
510 <indexterm zone="ch-system-gcc libgcc">
511 <primary sortas="c-libgcc">libgcc</primary>
512 </indexterm>
513 </listitem>
514 </varlistentry>
515
516 <varlistentry id="libgcov">
517 <term><filename class="libraryfile">libgcov</filename></term>
518 <listitem>
519 <para>This library is linked in to a program when GCC is instructed
520 to enable profiling</para>
521 <indexterm zone="ch-system-gcc libgcov">
522 <primary sortas="c-libgcov">libgcov</primary>
523 </indexterm>
524 </listitem>
525 </varlistentry>
526
527 <varlistentry id="libgomp">
528 <term><filename class="libraryfile">libgomp</filename></term>
529 <listitem>
530 <para>GNU implementation of the OpenMP API for multi-platform
531 shared-memory parallel programming in C/C++ and Fortran</para>
532 <indexterm zone="ch-system-gcc libgomp">
533 <primary sortas="c-libgomp">libgomp</primary>
534 </indexterm>
535 </listitem>
536 </varlistentry>
537
538 <varlistentry id="liblsan">
539 <term><filename class="libraryfile">liblsan</filename></term>
540 <listitem>
541 <para>The Leak Sanitizer runtime library</para>
542 <indexterm zone="ch-system-gcc liblsan">
543 <primary sortas="c-liblsan">liblsan</primary>
544 </indexterm>
545 </listitem>
546 </varlistentry>
547
548 <varlistentry id="liblto_plugin">
549 <term><filename class="libraryfile">liblto_plugin</filename></term>
550 <listitem>
551 <para>GCC's Link Time Optimization (LTO) plugin allows GCC to perform
552 optimizations across compilation units</para>
553 <indexterm zone="ch-system-gcc liblto_plugin">
554 <primary sortas="c-liblto_plugin">liblto_plugin</primary>
555 </indexterm>
556 </listitem>
557 </varlistentry>
558
559 <varlistentry id="libquadmath">
560 <term><filename class="libraryfile">libquadmath</filename></term>
561 <listitem>
562 <para>GCC Quad Precision Math Library API</para>
563 <indexterm zone="ch-system-gcc libquadmath">
564 <primary sortas="c-libquadmath">libquadmath</primary>
565 </indexterm>
566 </listitem>
567 </varlistentry>
568
569 <varlistentry id="libssp">
570 <term><filename class="libraryfile">libssp</filename></term>
571 <listitem>
572 <para>Contains routines supporting GCC's stack-smashing protection
573 functionality</para>
574 <indexterm zone="ch-system-gcc libssp">
575 <primary sortas="c-libssp">libssp</primary>
576 </indexterm>
577 </listitem>
578 </varlistentry>
579
580 <varlistentry id="libstdc">
581 <term><filename class="libraryfile">libstdc++</filename></term>
582 <listitem>
583 <para>The standard C++ library</para>
584 <indexterm zone="ch-system-gcc libstdc">
585 <primary sortas="c-libstdc++">libstdc++</primary>
586 </indexterm>
587 </listitem>
588 </varlistentry>
589
590 <varlistentry id="libstdcfs">
591 <term><filename class="libraryfile">libstdc++fs</filename></term>
592 <listitem>
593 <para>ISO/IEC TS 18822:2015 Filesystem library</para>
594 <indexterm zone="ch-system-gcc libstdcfs">
595 <primary sortas="c-libstdc++fs">libstdc++fs</primary>
596 </indexterm>
597 </listitem>
598 </varlistentry>
599
600 <varlistentry id="libsupc">
601 <term><filename class="libraryfile">libsupc++</filename></term>
602 <listitem>
603 <para>Provides supporting routines for the C++ programming
604 language</para>
605 <indexterm zone="ch-system-gcc libsupc">
606 <primary sortas="c-libsupc++">libsupc++</primary>
607 </indexterm>
608 </listitem>
609 </varlistentry>
610
611 <varlistentry id="libtsan">
612 <term><filename class="libraryfile">libtsan</filename></term>
613 <listitem>
614 <para>The Thread Sanitizer runtime library</para>
615 <indexterm zone="ch-system-gcc libtsan">
616 <primary sortas="c-libtsan">libtsan</primary>
617 </indexterm>
618 </listitem>
619 </varlistentry>
620
621 <varlistentry id="libubsan">
622 <term><filename class="libraryfile">libubsan</filename></term>
623 <listitem>
624 <para>The Undefined Behavior Sanitizer runtime library</para>
625 <indexterm zone="ch-system-gcc libubsan">
626 <primary sortas="c-libubsan">libubsan</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 </variablelist>
632
633 </sect2>
634
635</sect1>
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