source: chapter06/gcc.xml@ ae11e15d

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Last change on this file since ae11e15d was ae11e15d, checked in by Xi Ruoyao <xry111@…>, 4 years ago

gcc: tell the audience that Glibc-2.31 is the smoking gun

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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>
55 As in gcc-pass2, fix a problem introduced by Glibc-2.31:
56 </para>
57
58<screen><userinput remap="pre">sed -e '1161 s|^|//|' \
59 -i libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc</userinput></screen>
60
61 <para>The GCC documentation recommends building GCC in a dedicated build directory:</para>
62
63<screen><userinput remap="pre">mkdir -v build
64cd build</userinput></screen>
65
66 <para>Prepare GCC for compilation:</para>
67
68<screen><userinput remap="configure">SED=sed \
69../configure --prefix=/usr \
70 --enable-languages=c,c++ \
71 --disable-multilib \
72 --disable-bootstrap \
73 --with-system-zlib</userinput></screen>
74
75 <para>Note that for other languages, there are some prerequisites that
76 are not yet available. See the
77 <ulink url="&blfs-book;general/gcc.html">BLFS Book</ulink>
78 for instructions on how to build all of GCC's supported languages.</para>
79
80 <variablelist>
81 <title>The meaning of the new configure parameters:</title>
82
83 <varlistentry>
84 <term><envar>SED=sed</envar></term>
85 <listitem>
86 <para>Setting this environment variable prevents a hard-coded
87 path to /tools/bin/sed.</para>
88 </listitem>
89 </varlistentry>
90 <!--
91 <varlistentry>
92 <term><parameter>- -disable-libmpx</parameter></term>
93 <listitem>
94 <para>This switch tells GCC to not build mpx (Memory Protection
95 Extensions) that can cause problems on some processors. It has
96 been removed from the next version of gcc.</para>
97 </listitem>
98 </varlistentry>
99 -->
100 <varlistentry>
101 <term><parameter>--with-system-zlib</parameter></term>
102 <listitem>
103 <para>This switch tells GCC to link to the system installed copy of
104 the Zlib library, rather than its own internal copy.</para>
105 </listitem>
106 </varlistentry>
107 </variablelist>
108
109 <para>Compile the package:</para>
110
111<screen><userinput remap="make">make</userinput></screen>
112
113 <important>
114 <para>In this section, the test suite for GCC is considered
115 critical. Do not skip it under any circumstance.</para>
116 </important>
117
118 <para>One set of tests in the GCC test suite is known to exhaust the stack,
119 so increase the stack size prior to running the tests:</para>
120
121<screen><userinput remap="test">ulimit -s 32768</userinput></screen>
122
123 <para>Test the results as a non-privileged user, but do not stop at errors:</para>
124
125<screen><userinput remap="test">chown -Rv nobody .
126su nobody -s /bin/bash -c "PATH=$PATH make -k check"</userinput></screen>
127
128 <para>To receive a summary of the test suite results, run:</para>
129
130<screen><userinput remap="test">../contrib/test_summary</userinput></screen>
131
132 <para>For only the summaries, pipe the output through
133 <userinput>grep -A7 Summ</userinput>.</para>
134
135 <para>Results can be compared with those located at <ulink
136 url="&test-results;"/> and
137 <ulink url="https://gcc.gnu.org/ml/gcc-testresults/"/>.</para>
138
139 <para>Six tests related to get_time are known to fail. These are
140 apparently related to the en_HK locale.</para>
141
142 <para>Two tests named lookup.cc and reverse.cc in experimental/net
143 are known to fail in LFS chroot environment because they require
144 /etc/hosts and iana-etc.</para>
145
146 <para>Two tests named pr57193.c and pr90178.c are known to fail.</para>
147
148 <para>A few unexpected failures cannot always be avoided. The GCC developers
149 are usually aware of these issues, but have not resolved them yet.
150 Unless the test results are vastly different from those at the above URL,
151 it is safe to continue.</para>
152
153 <!--note><para>
154 On some combinations of kernel configuration and AMD processors
155 there may be more than 1100 failures in the gcc.target/i386/mpx
156 tests (which are designed to test the MPX option on recent
157 Intel processors). These can safely be ignored on AMD
158 processors. These tests will also fail on Intel processors if MPX support
159 is not enabled in the kernel even though it is present on the CPU.
160 </para></note-->
161
162 <para>Install the package and remove an unneeded directory:</para>
163
164<screen><userinput remap="install">make install
165rm -rf /usr/lib/gcc/$(gcc -dumpmachine)/&gcc-version;/include-fixed/bits/</userinput></screen>
166
167 <para>The GCC build directory is owned by <systemitem class="username">
168 nobody</systemitem> now and the ownership of the installed header
169 directory (and its content) will be incorrect. Change the ownership to
170 <systemitem class="username">root</systemitem> user and group:</para>
171
172<screen><userinput remap="install">chown -v -R root:root \
173 /usr/lib/gcc/*linux-gnu/&gcc-version;/include{,-fixed}</userinput></screen>
174
175 <para>Create a symlink required by the <ulink
176 url="https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch03s09.html">FHS</ulink>
177 for "historical" reasons.</para>
178
179<screen><userinput remap="install">ln -sv ../usr/bin/cpp /lib</userinput></screen>
180
181 <para>Many packages use the name <command>cc</command> to call the C
182 compiler. To satisfy those packages, create a symlink:</para>
183
184<screen><userinput remap="install">ln -sv gcc /usr/bin/cc</userinput></screen>
185
186 <para>Add a compatibility symlink to enable building programs with
187 Link Time Optimization (LTO):</para>
188
189<screen><userinput remap="install">install -v -dm755 /usr/lib/bfd-plugins
190ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/&gcc-version;/liblto_plugin.so \
191 /usr/lib/bfd-plugins/</userinput></screen>
192
193 <para>Now that our final toolchain is in place, it is important to again ensure
194 that compiling and linking will work as expected. We do this by performing
195 the same sanity checks as we did earlier in the chapter:</para>
196
197 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
198 href="adjusting.xml"
199 xpointer="xpointer(//*[@os='a'])"/>
200
201 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
202 href="adjusting.xml"
203 xpointer="xpointer(//*[@os='b'])"/>
204
205 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
206 href="adjusting.xml"
207 xpointer="xpointer(//*[@os='c'])"/>
208
209 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
210 href="adjusting.xml"
211 xpointer="xpointer(//*[@os='d'])"/>
212
213 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
214 href="adjusting.xml"
215 xpointer="xpointer(//*[@os='e'])"/>
216
217 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
218 href="adjusting.xml"
219 xpointer="xpointer(//*[@os='f'])"/>
220
221<screen><computeroutput>/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crt1.o succeeded
222/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crti.o succeeded
223/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crtn.o succeeded</computeroutput></screen>
224
225 <para>Depending on your machine architecture, the above may differ slightly,
226 the difference usually being the name of the directory
227 after <filename class="directory">/usr/lib/gcc</filename>. The important
228 thing to look for here is that <command>gcc</command> has found all three
229 <filename>crt*.o</filename> files under the
230 <filename class="directory">/usr/lib</filename> directory.</para>
231
232 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
233 href="adjusting.xml"
234 xpointer="xpointer(//*[@os='g'])"/>
235
236<screen><userinput>grep -B4 '^ /usr/include' dummy.log</userinput></screen>
237
238 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
239 href="adjusting.xml"
240 xpointer="xpointer(//*[@os='h'])"/>
241
242<screen><computeroutput>#include &lt;...&gt; search starts here:
243 /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include
244 /usr/local/include
245 /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include-fixed
246 /usr/include</computeroutput></screen>
247
248 <para>Again, note that the directory named after your target triplet may be
249 different than the above, depending on your architecture.</para>
250
251<!-- This appears to be obsolete
252
253 <note><para>As of version 4.3.0, GCC now unconditionally installs the
254 <filename>limits.h</filename> file into the private
255 <filename class="directory">include-fixed</filename> directory, and that
256 directory is required to be in place.</para></note>
257-->
258
259 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
260 href="adjusting.xml"
261 xpointer="xpointer(//*[@os='i'])"/>
262
263 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
264 href="adjusting.xml"
265 xpointer="xpointer(//*[@os='j'])"/>
266
267 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
268 href="adjusting.xml"
269 xpointer="xpointer(//*[@os='k'])"/>
270
271<screen><computeroutput>SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib64")
272SEARCH_DIR("/usr/local/lib64")
273SEARCH_DIR("/lib64")
274SEARCH_DIR("/usr/lib64")
275SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib")
276SEARCH_DIR("/usr/local/lib")
277SEARCH_DIR("/lib")
278SEARCH_DIR("/usr/lib");</computeroutput></screen>
279
280 <para>A 32-bit system may see a few different directories. For example, here
281 is the output from an i686 machine:</para>
282
283<screen><computeroutput>SEARCH_DIR("/usr/i686-pc-linux-gnu/lib32")
284SEARCH_DIR("/usr/local/lib32")
285SEARCH_DIR("/lib32")
286SEARCH_DIR("/usr/lib32")
287SEARCH_DIR("/usr/i686-pc-linux-gnu/lib")
288SEARCH_DIR("/usr/local/lib")
289SEARCH_DIR("/lib")
290SEARCH_DIR("/usr/lib");</computeroutput></screen>
291
292 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
293 href="adjusting.xml"
294 xpointer="xpointer(//*[@os='l'])"/>
295
296 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
297 href="adjusting.xml"
298 xpointer="xpointer(//*[@os='m'])"/>
299
300 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
301 href="adjusting.xml"
302 xpointer="xpointer(//*[@os='n'])"/>
303
304 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
305 href="adjusting.xml"
306 xpointer="xpointer(//*[@os='o'])"/>
307
308 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
309 href="adjusting.xml"
310 xpointer="xpointer(//*[@os='p'])"/>
311
312 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
313 href="adjusting.xml"
314 xpointer="xpointer(//*[@os='q'])"/>
315
316 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
317 href="adjusting.xml"
318 xpointer="xpointer(//*[@os='r'])"/>
319
320 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
321 href="adjusting.xml"
322 xpointer="xpointer(//*[@os='s'])"/>
323
324 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
325 href="adjusting.xml"
326 xpointer="xpointer(//*[@os='t'])"/>
327
328 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
329 href="adjusting.xml"
330 xpointer="xpointer(//*[@os='u'])"/>
331
332 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
333 href="adjusting.xml"
334 xpointer="xpointer(//*[@os='v'])"/>
335
336 <para>Finally, move a misplaced file:</para>
337
338<screen><userinput remap="install">mkdir -pv /usr/share/gdb/auto-load/usr/lib
339mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib</userinput></screen>
340
341 </sect2>
342
343 <sect2 id="contents-gcc" role="content">
344 <title>Contents of GCC</title>
345
346 <segmentedlist>
347 <segtitle>Installed programs</segtitle>
348 <segtitle>Installed libraries</segtitle>
349 <segtitle>Installed directories</segtitle>
350
351 <seglistitem>
352 <seg>c++, cc (link to gcc), cpp, g++, gcc,
353 gcc-ar, gcc-nm, gcc-ranlib, gcov, gcov-dump, and gcov-tool</seg>
354
355 <seg>libasan.{a,so}, libatomic.{a,so}, libcc1.so, libgcc.a, libgcc_eh.a,
356 libgcc_s.so, libgcov.a, libgomp.{a,so}, libitm.{a,so},
357 liblsan.{a,so}, liblto_plugin.so,
358 libquadmath.{a,so}, libssp.{a,so}, libssp_nonshared.a,
359 libstdc++.{a,so}, libstdc++fs.a, libsupc++.a, libtsan.{a,so},
360 and libubsan.{a,so}</seg>
361
362 <seg>/usr/include/c++, /usr/lib/gcc, /usr/libexec/gcc, and
363 /usr/share/gcc-&gcc-version;</seg>
364 </seglistitem>
365 </segmentedlist>
366
367 <variablelist>
368 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
369 <?dbfo list-presentation="list"?>
370 <?dbhtml list-presentation="table"?>
371
372 <varlistentry id="c">
373 <term><command>c++</command></term>
374 <listitem>
375 <para>The C++ compiler</para>
376 <indexterm zone="ch-system-gcc c">
377 <primary sortas="b-c++">c++</primary>
378 </indexterm>
379 </listitem>
380 </varlistentry>
381
382 <varlistentry id="cc">
383 <term><command>cc</command></term>
384 <listitem>
385 <para>The C compiler</para>
386 <indexterm zone="ch-system-gcc cc">
387 <primary sortas="b-cc">cc</primary>
388 </indexterm>
389 </listitem>
390 </varlistentry>
391
392 <varlistentry id="cpp">
393 <term><command>cpp</command></term>
394 <listitem>
395 <para>The C preprocessor; it is used by the compiler to expand the
396 #include, #define, and similar statements in the source files</para>
397 <indexterm zone="ch-system-gcc cpp">
398 <primary sortas="b-cpp">cpp</primary>
399 </indexterm>
400 </listitem>
401 </varlistentry>
402
403 <varlistentry id="g">
404 <term><command>g++</command></term>
405 <listitem>
406 <para>The C++ compiler</para>
407 <indexterm zone="ch-system-gcc g">
408 <primary sortas="b-g++">g++</primary>
409 </indexterm>
410 </listitem>
411 </varlistentry>
412
413 <varlistentry id="gcc">
414 <term><command>gcc</command></term>
415 <listitem>
416 <para>The C compiler</para>
417 <indexterm zone="ch-system-gcc gcc">
418 <primary sortas="b-gcc">gcc</primary>
419 </indexterm>
420 </listitem>
421 </varlistentry>
422
423 <varlistentry id="gcc-ar">
424 <term><command>gcc-ar</command></term>
425 <listitem>
426 <para>A wrapper around <command>ar</command> that adds a
427 plugin to the command line. This program is only used
428 to add "link time optimization" and is not useful with the
429 default build options</para>
430 <indexterm zone="ch-system-gcc gcc-ar">
431 <primary sortas="b-gcc-ar">gc-ar</primary>
432 </indexterm>
433 </listitem>
434 </varlistentry>
435
436 <varlistentry id="gcc-nm">
437 <term><command>gcc-nm</command></term>
438 <listitem>
439 <para>A wrapper around <command>nm</command> that adds a
440 plugin to the command line. This program is only used
441 to add "link time optimization" and is not useful with the
442 default build options</para>
443 <indexterm zone="ch-system-gcc gcc-nm">
444 <primary sortas="b-gcc-nm">gc-nm</primary>
445 </indexterm>
446 </listitem>
447 </varlistentry>
448
449 <varlistentry id="gcc-ranlib">
450 <term><command>gcc-ranlib</command></term>
451 <listitem>
452 <para>A wrapper around <command>ranlib</command> that adds a
453 plugin to the command line. This program is only used
454 to add "link time optimization" and is not useful with the
455 default build options</para>
456 <indexterm zone="ch-system-gcc gcc-ranlib">
457 <primary sortas="b-gcc-ranlib">gc-ranlib</primary>
458 </indexterm>
459 </listitem>
460 </varlistentry>
461
462 <varlistentry id="gcov">
463 <term><command>gcov</command></term>
464 <listitem>
465 <para>A coverage testing tool; it is used to analyze programs to
466 determine where optimizations will have the most effect</para>
467 <indexterm zone="ch-system-gcc gcov">
468 <primary sortas="b-gcov">gcov</primary>
469 </indexterm>
470 </listitem>
471 </varlistentry>
472
473 <varlistentry id="gcov-dump">
474 <term><command>gcov-dump</command></term>
475 <listitem>
476 <para>Offline gcda and gcno profile dump tool</para>
477 <indexterm zone="ch-system-gcc gcov-dump">
478 <primary sortas="b-gcov-dump">gcov-dump</primary>
479 </indexterm>
480 </listitem>
481 </varlistentry>
482
483 <varlistentry id="gcov-tool">
484 <term><command>gcov-tool</command></term>
485 <listitem>
486 <para>Offline gcda profile processing tool</para>
487 <indexterm zone="ch-system-gcc gcov-tool">
488 <primary sortas="b-gcov-tool">gcov-tool</primary>
489 </indexterm>
490 </listitem>
491 </varlistentry>
492
493 <varlistentry id="libasan">
494 <term><filename class="libraryfile">libasan</filename></term>
495 <listitem>
496 <para>The Address Sanitizer runtime library</para>
497 <indexterm zone="ch-system-gcc libasan">
498 <primary sortas="b-libasan">libasan</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="libatomic">
504 <term><filename class="libraryfile">libatomic</filename></term>
505 <listitem>
506 <para>GCC atomic built-in runtime library</para>
507 <indexterm zone="ch-system-gcc libatomic">
508 <primary sortas="b-libatomic">libatomic</primary>
509 </indexterm>
510 </listitem>
511 </varlistentry>
512
513 <varlistentry id="libcc1">
514 <term><filename class="libraryfile">libcc1</filename></term>
515 <listitem>
516 <para>The C preprocessing library</para>
517 <indexterm zone="ch-system-gcc libcc1">
518 <primary sortas="b-libcc1">libcc1</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="libgcc">
524 <term><filename class="libraryfile">libgcc</filename></term>
525 <listitem>
526 <para>Contains run-time support for <command>gcc</command></para>
527 <indexterm zone="ch-system-gcc libgcc">
528 <primary sortas="c-libgcc">libgcc</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
533 <varlistentry id="libgcov">
534 <term><filename class="libraryfile">libgcov</filename></term>
535 <listitem>
536 <para>This library is linked in to a program when GCC is instructed
537 to enable profiling</para>
538 <indexterm zone="ch-system-gcc libgcov">
539 <primary sortas="c-libgcov">libgcov</primary>
540 </indexterm>
541 </listitem>
542 </varlistentry>
543
544 <varlistentry id="libgomp">
545 <term><filename class="libraryfile">libgomp</filename></term>
546 <listitem>
547 <para>GNU implementation of the OpenMP API for multi-platform
548 shared-memory parallel programming in C/C++ and Fortran</para>
549 <indexterm zone="ch-system-gcc libgomp">
550 <primary sortas="c-libgomp">libgomp</primary>
551 </indexterm>
552 </listitem>
553 </varlistentry>
554
555 <varlistentry id="liblsan">
556 <term><filename class="libraryfile">liblsan</filename></term>
557 <listitem>
558 <para>The Leak Sanitizer runtime library</para>
559 <indexterm zone="ch-system-gcc liblsan">
560 <primary sortas="c-liblsan">liblsan</primary>
561 </indexterm>
562 </listitem>
563 </varlistentry>
564
565 <varlistentry id="liblto_plugin">
566 <term><filename class="libraryfile">liblto_plugin</filename></term>
567 <listitem>
568 <para>GCC's Link Time Optimization (LTO) plugin allows GCC to perform
569 optimizations across compilation units</para>
570 <indexterm zone="ch-system-gcc liblto_plugin">
571 <primary sortas="c-liblto_plugin">liblto_plugin</primary>
572 </indexterm>
573 </listitem>
574 </varlistentry>
575
576 <varlistentry id="libquadmath">
577 <term><filename class="libraryfile">libquadmath</filename></term>
578 <listitem>
579 <para>GCC Quad Precision Math Library API</para>
580 <indexterm zone="ch-system-gcc libquadmath">
581 <primary sortas="c-libquadmath">libquadmath</primary>
582 </indexterm>
583 </listitem>
584 </varlistentry>
585
586 <varlistentry id="libssp">
587 <term><filename class="libraryfile">libssp</filename></term>
588 <listitem>
589 <para>Contains routines supporting GCC's stack-smashing protection
590 functionality</para>
591 <indexterm zone="ch-system-gcc libssp">
592 <primary sortas="c-libssp">libssp</primary>
593 </indexterm>
594 </listitem>
595 </varlistentry>
596
597 <varlistentry id="libstdc">
598 <term><filename class="libraryfile">libstdc++</filename></term>
599 <listitem>
600 <para>The standard C++ library</para>
601 <indexterm zone="ch-system-gcc libstdc">
602 <primary sortas="c-libstdc++">libstdc++</primary>
603 </indexterm>
604 </listitem>
605 </varlistentry>
606
607 <varlistentry id="libstdcfs">
608 <term><filename class="libraryfile">libstdc++fs</filename></term>
609 <listitem>
610 <para>ISO/IEC TS 18822:2015 Filesystem library</para>
611 <indexterm zone="ch-system-gcc libstdcfs">
612 <primary sortas="c-libstdc++fs">libstdc++fs</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616
617 <varlistentry id="libsupc">
618 <term><filename class="libraryfile">libsupc++</filename></term>
619 <listitem>
620 <para>Provides supporting routines for the C++ programming
621 language</para>
622 <indexterm zone="ch-system-gcc libsupc">
623 <primary sortas="c-libsupc++">libsupc++</primary>
624 </indexterm>
625 </listitem>
626 </varlistentry>
627
628 <varlistentry id="libtsan">
629 <term><filename class="libraryfile">libtsan</filename></term>
630 <listitem>
631 <para>The Thread Sanitizer runtime library</para>
632 <indexterm zone="ch-system-gcc libtsan">
633 <primary sortas="c-libtsan">libtsan</primary>
634 </indexterm>
635 </listitem>
636 </varlistentry>
637
638 <varlistentry id="libubsan">
639 <term><filename class="libraryfile">libubsan</filename></term>
640 <listitem>
641 <para>The Undefined Behavior Sanitizer runtime library</para>
642 <indexterm zone="ch-system-gcc libubsan">
643 <primary sortas="c-libubsan">libubsan</primary>
644 </indexterm>
645 </listitem>
646 </varlistentry>
647
648 </variablelist>
649
650 </sect2>
651
652</sect1>
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