BOOK/chapter06/gcc.xml

   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   ;;
  52 esac</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
  57 cd       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 .
 119 su 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     apparently 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 and remove an unneeded directory:</para>
 156
 157 <screen><userinput remap="install">make install
 158 rm -rf /usr/lib/gcc/$(gcc -dumpmachine)/&gcc-version;/include-fixed/bits/</userinput></screen>
 159
 160     <para>The GCC build directory is owned by <systemitem class="username">
 161     nobody</systemitem> now and the ownership of the installed header
 162     directory (and its content) will be incorrect.  Change the ownership to
 163     <systemitem class="username">root</systemitem> user and group:</para>
 164
 165 <screen><userinput remap="install">chown -v -R root:root \
 166     /usr/lib/gcc/*linux-gnu/&gcc-version;/include{,-fixed}</userinput></screen>
 167
 168     <para>Create a symlink required by the <ulink
 169     url="https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch03s09.html">FHS</ulink>
 170     for "historical" reasons.</para>
 171
 172 <screen><userinput remap="install">ln -sv ../usr/bin/cpp /lib</userinput></screen>
 173
 174     <para>Many packages use the name <command>cc</command> to call the C
 175     compiler. To satisfy those packages, create a symlink:</para>
 176
 177 <screen><userinput remap="install">ln -sv gcc /usr/bin/cc</userinput></screen>
 178
 179     <para>Add a compatibility symlink to enable building programs with
 180     Link Time Optimization (LTO):</para>
 181
 182 <screen><userinput remap="install">install -v -dm755 /usr/lib/bfd-plugins
 183 ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/&gcc-version;/liblto_plugin.so \
 184         /usr/lib/bfd-plugins/</userinput></screen>
 185
 186     <para>Now that our final toolchain is in place, it is important to again ensure
 187     that compiling and linking will work as expected. We do this by performing
 188     the same sanity checks as we did earlier in the chapter:</para>
 189
 190     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 191     href="adjusting.xml"
 192     xpointer="xpointer(//*[@os='a'])"/>
 193
 194     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 195     href="adjusting.xml"
 196     xpointer="xpointer(//*[@os='b'])"/>
 197
 198     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 199     href="adjusting.xml"
 200     xpointer="xpointer(//*[@os='c'])"/>
 201
 202     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 203     href="adjusting.xml"
 204     xpointer="xpointer(//*[@os='d'])"/>
 205
 206     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 207     href="adjusting.xml"
 208     xpointer="xpointer(//*[@os='e'])"/>
 209
 210     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 211     href="adjusting.xml"
 212     xpointer="xpointer(//*[@os='f'])"/>
 213
 214 <screen><computeroutput>/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crt1.o succeeded
 215 /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crti.o succeeded
 216 /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crtn.o succeeded</computeroutput></screen>
 217
 218   <para>Depending on your machine architecture, the above may differ slightly,
 219   the difference usually being the name of the directory
 220   after <filename class="directory">/usr/lib/gcc</filename>. The important
 221   thing to look for here is that <command>gcc</command> has found all three
 222   <filename>crt*.o</filename> files under the
 223   <filename class="directory">/usr/lib</filename> directory.</para>
 224
 225     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 226     href="adjusting.xml"
 227     xpointer="xpointer(//*[@os='g'])"/>
 228
 229 <screen><userinput>grep -B4 '^ /usr/include' dummy.log</userinput></screen>
 230
 231     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 232     href="adjusting.xml"
 233     xpointer="xpointer(//*[@os='h'])"/>
 234
 235 <screen><computeroutput>#include &lt;...&gt; search starts here:
 236  /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include
 237  /usr/local/include
 238  /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include-fixed
 239  /usr/include</computeroutput></screen>
 240
 241    <para>Again, note that the directory named after your target triplet may be
 242    different than the above, depending on your architecture.</para>
 243
 244 <!--  This appears to be obsolete
 245
 246     <note><para>As of version 4.3.0, GCC now unconditionally installs the
 247     <filename>limits.h</filename> file into the private
 248     <filename class="directory">include-fixed</filename> directory, and that
 249     directory is required to be in place.</para></note>
 250 -->
 251
 252     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 253     href="adjusting.xml"
 254     xpointer="xpointer(//*[@os='i'])"/>
 255
 256     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 257     href="adjusting.xml"
 258     xpointer="xpointer(//*[@os='j'])"/>
 259
 260     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 261     href="adjusting.xml"
 262     xpointer="xpointer(//*[@os='k'])"/>
 263
 264 <screen><computeroutput>SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib64")
 265 SEARCH_DIR("/usr/local/lib64")
 266 SEARCH_DIR("/lib64")
 267 SEARCH_DIR("/usr/lib64")
 268 SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib")
 269 SEARCH_DIR("/usr/local/lib")
 270 SEARCH_DIR("/lib")
 271 SEARCH_DIR("/usr/lib");</computeroutput></screen>
 272
 273    <para>A 32-bit system may see a few different directories. For example, here
 274    is the output from an i686 machine:</para>
 275
 276 <screen><computeroutput>SEARCH_DIR("/usr/i686-pc-linux-gnu/lib32")
 277 SEARCH_DIR("/usr/local/lib32")
 278 SEARCH_DIR("/lib32")
 279 SEARCH_DIR("/usr/lib32")
 280 SEARCH_DIR("/usr/i686-pc-linux-gnu/lib")
 281 SEARCH_DIR("/usr/local/lib")
 282 SEARCH_DIR("/lib")
 283 SEARCH_DIR("/usr/lib");</computeroutput></screen>
 284
 285     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 286     href="adjusting.xml"
 287     xpointer="xpointer(//*[@os='l'])"/>
 288
 289     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 290     href="adjusting.xml"
 291     xpointer="xpointer(//*[@os='m'])"/>
 292
 293     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 294     href="adjusting.xml"
 295     xpointer="xpointer(//*[@os='n'])"/>
 296
 297     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 298     href="adjusting.xml"
 299     xpointer="xpointer(//*[@os='o'])"/>
 300
 301     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 302     href="adjusting.xml"
 303     xpointer="xpointer(//*[@os='p'])"/>
 304
 305     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 306     href="adjusting.xml"
 307     xpointer="xpointer(//*[@os='q'])"/>
 308
 309     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 310     href="adjusting.xml"
 311     xpointer="xpointer(//*[@os='r'])"/>
 312
 313     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 314     href="adjusting.xml"
 315     xpointer="xpointer(//*[@os='s'])"/>
 316
 317     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 318     href="adjusting.xml"
 319     xpointer="xpointer(//*[@os='t'])"/>
 320
 321     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 322     href="adjusting.xml"
 323     xpointer="xpointer(//*[@os='u'])"/>
 324
 325     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
 326     href="adjusting.xml"
 327     xpointer="xpointer(//*[@os='v'])"/>
 328
 329     <para>Finally, move a misplaced file:</para>
 330
 331 <screen><userinput remap="install">mkdir -pv /usr/share/gdb/auto-load/usr/lib
 332 mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib</userinput></screen>
 333
 334   </sect2>
 335
 336   <sect2 id="contents-gcc" role="content">
 337     <title>Contents of GCC</title>
 338
 339     <segmentedlist>
 340       <segtitle>Installed programs</segtitle>
 341       <segtitle>Installed libraries</segtitle>
 342       <segtitle>Installed directories</segtitle>
 343
 344       <seglistitem>
 345         <seg>c++, cc (link to gcc), cpp, g++, gcc,
 346         gcc-ar, gcc-nm, gcc-ranlib, gcov, gcov-dump, and gcov-tool</seg>
 347
 348         <seg>libasan.{a,so}, libatomic.{a,so}, libcc1.so, libgcc.a, libgcc_eh.a,
 349         libgcc_s.so, libgcov.a, libgomp.{a,so}, libitm.{a,so},
 350         liblsan.{a,so}, liblto_plugin.so,
 351         libquadmath.{a,so}, libssp.{a,so}, libssp_nonshared.a,
 352         libstdc++.{a,so}, libstdc++fs.a, libsupc++.a, libtsan.{a,so},
 353         and libubsan.{a,so}</seg>
 354
 355         <seg>/usr/include/c++, /usr/lib/gcc, /usr/libexec/gcc, and
 356         /usr/share/gcc-&gcc-version;</seg>
 357       </seglistitem>
 358     </segmentedlist>
 359
 360     <variablelist>
 361       <bridgehead renderas="sect3">Short Descriptions</bridgehead>
 362       <?dbfo list-presentation="list"?>
 363       <?dbhtml list-presentation="table"?>
 364
 365       <varlistentry id="c">
 366         <term><command>c++</command></term>
 367         <listitem>
 368           <para>The C++ compiler</para>
 369           <indexterm zone="ch-system-gcc c">
 370             <primary sortas="b-c++">c++</primary>
 371           </indexterm>
 372         </listitem>
 373       </varlistentry>
 374
 375       <varlistentry id="cc">
 376         <term><command>cc</command></term>
 377         <listitem>
 378           <para>The C compiler</para>
 379           <indexterm zone="ch-system-gcc cc">
 380             <primary sortas="b-cc">cc</primary>
 381           </indexterm>
 382         </listitem>
 383       </varlistentry>
 384
 385       <varlistentry id="cpp">
 386         <term><command>cpp</command></term>
 387         <listitem>
 388           <para>The C preprocessor; it is used by the compiler to expand the
 389           #include, #define, and similar statements in the source files</para>
 390           <indexterm zone="ch-system-gcc cpp">
 391             <primary sortas="b-cpp">cpp</primary>
 392           </indexterm>
 393         </listitem>
 394       </varlistentry>
 395
 396       <varlistentry id="g">
 397         <term><command>g++</command></term>
 398         <listitem>
 399           <para>The C++ compiler</para>
 400           <indexterm zone="ch-system-gcc g">
 401             <primary sortas="b-g++">g++</primary>
 402           </indexterm>
 403         </listitem>
 404       </varlistentry>
 405
 406       <varlistentry id="gcc">
 407         <term><command>gcc</command></term>
 408         <listitem>
 409           <para>The C compiler</para>
 410           <indexterm zone="ch-system-gcc gcc">
 411             <primary sortas="b-gcc">gcc</primary>
 412           </indexterm>
 413         </listitem>
 414       </varlistentry>
 415
 416       <varlistentry id="gcc-ar">
 417         <term><command>gcc-ar</command></term>
 418         <listitem>
 419           <para>A wrapper around <command>ar</command> that adds a
 420           plugin to the command line. This program is only used
 421           to add "link time optimization" and is not useful with the
 422           default build options</para>
 423           <indexterm zone="ch-system-gcc gcc-ar">
 424             <primary sortas="b-gcc-ar">gc-ar</primary>
 425           </indexterm>
 426         </listitem>
 427       </varlistentry>
 428
 429       <varlistentry id="gcc-nm">
 430         <term><command>gcc-nm</command></term>
 431         <listitem>
 432           <para>A wrapper around <command>nm</command> that adds a
 433           plugin to the command line. This program is only used
 434           to add "link time optimization" and is not useful with the
 435           default build options</para>
 436           <indexterm zone="ch-system-gcc gcc-nm">
 437             <primary sortas="b-gcc-nm">gc-nm</primary>
 438           </indexterm>
 439         </listitem>
 440       </varlistentry>
 441
 442       <varlistentry id="gcc-ranlib">
 443         <term><command>gcc-ranlib</command></term>
 444         <listitem>
 445           <para>A wrapper around <command>ranlib</command> that adds a
 446           plugin to the command line. This program is only used
 447           to add "link time optimization" and is not useful with the
 448           default build options</para>
 449           <indexterm zone="ch-system-gcc gcc-ranlib">
 450             <primary sortas="b-gcc-ranlib">gc-ranlib</primary>
 451           </indexterm>
 452         </listitem>
 453       </varlistentry>
 454
 455       <varlistentry id="gcov">
 456         <term><command>gcov</command></term>
 457         <listitem>
 458           <para>A coverage testing tool; it is used to analyze programs to
 459           determine where optimizations will have the most effect</para>
 460           <indexterm zone="ch-system-gcc gcov">
 461             <primary sortas="b-gcov">gcov</primary>
 462           </indexterm>
 463         </listitem>
 464       </varlistentry>
 465
 466       <varlistentry id="gcov-dump">
 467         <term><command>gcov-dump</command></term>
 468         <listitem>
 469           <para>Offline gcda and gcno profile dump tool</para>
 470           <indexterm zone="ch-system-gcc gcov-dump">
 471             <primary sortas="b-gcov-dump">gcov-dump</primary>
 472           </indexterm>
 473         </listitem>
 474       </varlistentry>
 475
 476       <varlistentry id="gcov-tool">
 477         <term><command>gcov-tool</command></term>
 478         <listitem>
 479           <para>Offline gcda profile processing tool</para>
 480           <indexterm zone="ch-system-gcc gcov-tool">
 481             <primary sortas="b-gcov-tool">gcov-tool</primary>
 482           </indexterm>
 483         </listitem>
 484       </varlistentry>
 485
 486       <varlistentry id="libasan">
 487         <term><filename class="libraryfile">libasan</filename></term>
 488         <listitem>
 489           <para>The Address Sanitizer runtime library</para>
 490           <indexterm zone="ch-system-gcc libasan">
 491             <primary sortas="b-libasan">libasan</primary>
 492           </indexterm>
 493         </listitem>
 494       </varlistentry>
 495
 496       <varlistentry id="libatomic">
 497         <term><filename class="libraryfile">libatomic</filename></term>
 498         <listitem>
 499           <para>GCC atomic built-in runtime library</para>
 500           <indexterm zone="ch-system-gcc libatomic">
 501             <primary sortas="b-libatomic">libatomic</primary>
 502           </indexterm>
 503         </listitem>
 504       </varlistentry>
 505
 506       <varlistentry id="libcc1">
 507         <term><filename class="libraryfile">libcc1</filename></term>
 508         <listitem>
 509           <para>The C preprocessing library</para>
 510           <indexterm zone="ch-system-gcc libcc1">
 511             <primary sortas="b-libcc1">libcc1</primary>
 512           </indexterm>
 513         </listitem>
 514       </varlistentry>
 515
 516       <varlistentry id="libgcc">
 517         <term><filename class="libraryfile">libgcc</filename></term>
 518         <listitem>
 519           <para>Contains run-time support for <command>gcc</command></para>
 520           <indexterm zone="ch-system-gcc libgcc">
 521             <primary sortas="c-libgcc">libgcc</primary>
 522           </indexterm>
 523         </listitem>
 524       </varlistentry>
 525
 526       <varlistentry id="libgcov">
 527         <term><filename class="libraryfile">libgcov</filename></term>
 528         <listitem>
 529           <para>This library is linked in to a program when GCC is instructed
 530           to enable profiling</para>
 531           <indexterm zone="ch-system-gcc libgcov">
 532             <primary sortas="c-libgcov">libgcov</primary>
 533           </indexterm>
 534         </listitem>
 535       </varlistentry>
 536
 537       <varlistentry id="libgomp">
 538         <term><filename class="libraryfile">libgomp</filename></term>
 539         <listitem>
 540           <para>GNU implementation of the OpenMP API for multi-platform
 541           shared-memory parallel programming in C/C++ and Fortran</para>
 542           <indexterm zone="ch-system-gcc libgomp">
 543             <primary sortas="c-libgomp">libgomp</primary>
 544           </indexterm>
 545         </listitem>
 546       </varlistentry>
 547
 548       <varlistentry id="liblsan">
 549         <term><filename class="libraryfile">liblsan</filename></term>
 550         <listitem>
 551           <para>The Leak Sanitizer runtime library</para>
 552           <indexterm zone="ch-system-gcc liblsan">
 553             <primary sortas="c-liblsan">liblsan</primary>
 554           </indexterm>
 555         </listitem>
 556       </varlistentry>
 557
 558       <varlistentry id="liblto_plugin">
 559         <term><filename class="libraryfile">liblto_plugin</filename></term>
 560         <listitem>
 561           <para>GCC's Link Time Optimization (LTO) plugin allows GCC to perform
 562           optimizations across compilation units</para>
 563           <indexterm zone="ch-system-gcc liblto_plugin">
 564             <primary sortas="c-liblto_plugin">liblto_plugin</primary>
 565           </indexterm>
 566         </listitem>
 567       </varlistentry>
 568
 569       <varlistentry id="libquadmath">
 570         <term><filename class="libraryfile">libquadmath</filename></term>
 571         <listitem>
 572           <para>GCC Quad Precision Math Library API</para>
 573           <indexterm zone="ch-system-gcc libquadmath">
 574             <primary sortas="c-libquadmath">libquadmath</primary>
 575           </indexterm>
 576         </listitem>
 577       </varlistentry>
 578
 579       <varlistentry id="libssp">
 580         <term><filename class="libraryfile">libssp</filename></term>
 581         <listitem>
 582           <para>Contains routines supporting GCC's stack-smashing protection
 583           functionality</para>
 584           <indexterm zone="ch-system-gcc libssp">
 585             <primary sortas="c-libssp">libssp</primary>
 586           </indexterm>
 587         </listitem>
 588       </varlistentry>
 589
 590       <varlistentry id="libstdc">
 591         <term><filename class="libraryfile">libstdc++</filename></term>
 592         <listitem>
 593           <para>The standard C++ library</para>
 594           <indexterm zone="ch-system-gcc libstdc">
 595             <primary sortas="c-libstdc++">libstdc++</primary>
 596           </indexterm>
 597         </listitem>
 598       </varlistentry>
 599
 600       <varlistentry id="libstdcfs">
 601         <term><filename class="libraryfile">libstdc++fs</filename></term>
 602         <listitem>
 603           <para>ISO/IEC TS 18822:2015 Filesystem library</para>
 604           <indexterm zone="ch-system-gcc libstdcfs">
 605             <primary sortas="c-libstdc++fs">libstdc++fs</primary>
 606           </indexterm>
 607         </listitem>
 608       </varlistentry>
 609
 610       <varlistentry id="libsupc">
 611         <term><filename class="libraryfile">libsupc++</filename></term>
 612         <listitem>
 613           <para>Provides supporting routines for the C++ programming
 614           language</para>
 615           <indexterm zone="ch-system-gcc libsupc">
 616             <primary sortas="c-libsupc++">libsupc++</primary>
 617           </indexterm>
 618         </listitem>
 619       </varlistentry>
 620
 621       <varlistentry id="libtsan">
 622         <term><filename class="libraryfile">libtsan</filename></term>
 623         <listitem>
 624           <para>The Thread Sanitizer runtime library</para>
 625           <indexterm zone="ch-system-gcc libtsan">
 626             <primary sortas="c-libtsan">libtsan</primary>
 627           </indexterm>
 628         </listitem>
 629       </varlistentry>
 630
 631       <varlistentry id="libubsan">
 632         <term><filename class="libraryfile">libubsan</filename></term>
 633         <listitem>
 634           <para>The Undefined Behavior Sanitizer runtime library</para>
 635           <indexterm zone="ch-system-gcc libubsan">
 636             <primary sortas="c-libubsan">libubsan</primary>
 637           </indexterm>
 638         </listitem>
 639       </varlistentry>
 640
 641     </variablelist>
 642
 643   </sect2>
 644
 645 </sect1>