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249 lines
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HTML
249 lines
13 KiB
HTML
<html lang="en">
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<title>Prerequisites for GCC</title>
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<h1 class="settitle">Prerequisites for GCC</h1>
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<a name="index-Prerequisites-1"></a>
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GCC requires that various tools and packages be available for use in the
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build procedure. Modifying GCC sources requires additional tools
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described below.
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<h3 class="heading"><a name="TOC0"></a>Tools/packages necessary for building GCC</h3>
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<dl>
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<dt>ISO C90 compiler<dd>Necessary to bootstrap GCC, although versions of GCC prior
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to 3.4 also allow bootstrapping with a traditional (K&R) C compiler.
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<p>To build all languages in a cross-compiler or other configuration where
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3-stage bootstrap is not performed, you need to start with an existing
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GCC binary (version 2.95 or later) because source code for language
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frontends other than C might use GCC extensions.
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<br><dt>GNAT<dd>
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In order to build the Ada compiler (GNAT) you must already have GNAT
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installed because portions of the Ada frontend are written in Ada (with
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GNAT extensions.) Refer to the Ada installation instructions for more
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specific information.
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<br><dt>A “working” POSIX compatible shell, or GNU bash<dd>
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Necessary when running <samp><span class="command">configure</span></samp> because some
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<samp><span class="command">/bin/sh</span></samp> shells have bugs and may crash when configuring the
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target libraries. In other cases, <samp><span class="command">/bin/sh</span></samp> or <samp><span class="command">ksh</span></samp>
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have disastrous corner-case performance problems. This
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can cause target <samp><span class="command">configure</span></samp> runs to literally take days to
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complete in some cases.
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<p>So on some platforms <samp><span class="command">/bin/ksh</span></samp> is sufficient, on others it
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isn't. See the host/target specific instructions for your platform, or
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use <samp><span class="command">bash</span></samp> to be sure. Then set <samp><span class="env">CONFIG_SHELL</span></samp> in your
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environment to your “good” shell prior to running
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<samp><span class="command">configure</span></samp>/<samp><span class="command">make</span></samp>.
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<p><samp><span class="command">zsh</span></samp> is not a fully compliant POSIX shell and will not
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work when configuring GCC.
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<br><dt>A POSIX or SVR4 awk<dd>
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Necessary for creating some of the generated source files for GCC.
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If in doubt, use a recent GNU awk version, as some of the older ones
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are broken. GNU awk version 3.1.5 is known to work.
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<br><dt>GNU binutils<dd>
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Necessary in some circumstances, optional in others. See the
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host/target specific instructions for your platform for the exact
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requirements.
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<br><dt>gzip version 1.2.4 (or later) or<dt>bzip2 version 1.0.2 (or later)<dd>
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Necessary to uncompress GCC <samp><span class="command">tar</span></samp> files when source code is
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obtained via FTP mirror sites.
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<br><dt>GNU make version 3.79.1 (or later)<dd>
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You must have GNU make installed to build GCC.
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<br><dt>GNU tar version 1.14 (or later)<dd>
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Necessary (only on some platforms) to untar the source code. Many
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systems' <samp><span class="command">tar</span></samp> programs will also work, only try GNU
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<samp><span class="command">tar</span></samp> if you have problems.
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<br><dt>GNU Multiple Precision Library (GMP) version 4.1 (or later)<dd>
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Necessary to build GCC. If you do not have it installed in your
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library search path, you will have to configure with the
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<samp><span class="option">--with-gmp</span></samp> configure option. See also
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<samp><span class="option">--with-gmp-lib</span></samp> and <samp><span class="option">--with-gmp-include</span></samp>.
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<br><dt>MPFR Library version 2.3.0 (or later)<dd>
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Necessary to build GCC. It can be downloaded from
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<a href="http://www.mpfr.org/">http://www.mpfr.org/</a>. The version of MPFR that is bundled with
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GMP 4.1.x contains numerous bugs. Although GCC may appear to function
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with the buggy versions of MPFR, there are a few bugs that will not be
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fixed when using this version. It is strongly recommended to upgrade
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to the recommended version of MPFR.
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<p>The <samp><span class="option">--with-mpfr</span></samp> configure option should be used if your MPFR
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Library is not installed in your default library search path. See
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also <samp><span class="option">--with-mpfr-lib</span></samp> and <samp><span class="option">--with-mpfr-include</span></samp>.
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<br><dt><samp><span class="command">jar</span></samp>, or InfoZIP (<samp><span class="command">zip</span></samp> and <samp><span class="command">unzip</span></samp>)<dd>
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Necessary to build libgcj, the GCJ runtime.
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</dl>
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<h3 class="heading"><a name="TOC1"></a>Tools/packages necessary for modifying GCC</h3>
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<dl>
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<dt>autoconf version 2.59<dt>GNU m4 version 1.4 (or later)<dd>
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Necessary when modifying <samp><span class="file">configure.ac</span></samp>, <samp><span class="file">aclocal.m4</span></samp>, etc.
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to regenerate <samp><span class="file">configure</span></samp> and <samp><span class="file">config.in</span></samp> files.
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<br><dt>automake version 1.9.6<dd>
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Necessary when modifying a <samp><span class="file">Makefile.am</span></samp> file to regenerate its
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associated <samp><span class="file">Makefile.in</span></samp>.
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<p>Much of GCC does not use automake, so directly edit the <samp><span class="file">Makefile.in</span></samp>
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file. Specifically this applies to the <samp><span class="file">gcc</span></samp>, <samp><span class="file">intl</span></samp>,
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<samp><span class="file">libcpp</span></samp>, <samp><span class="file">libiberty</span></samp>, <samp><span class="file">libobjc</span></samp> directories as well
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as any of their subdirectories.
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<p>For directories that use automake, GCC requires the latest release in
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the 1.9.x series, which is currently 1.9.6. When regenerating a directory
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to a newer version, please update all the directories using an older 1.9.x
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to the latest released version.
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<br><dt>gettext version 0.14.5 (or later)<dd>
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Needed to regenerate <samp><span class="file">gcc.pot</span></samp>.
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<br><dt>gperf version 2.7.2 (or later)<dd>
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Necessary when modifying <samp><span class="command">gperf</span></samp> input files, e.g.
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<samp><span class="file">gcc/cp/cfns.gperf</span></samp> to regenerate its associated header file, e.g.
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<samp><span class="file">gcc/cp/cfns.h</span></samp>.
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<br><dt>DejaGnu 1.4.4<dt>Expect<dt>Tcl<dd>
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Necessary to run the GCC testsuite; see the section on testing for details.
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<br><dt>autogen version 5.5.4 (or later) and<dt>guile version 1.4.1 (or later)<dd>
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Necessary to regenerate <samp><span class="file">fixinc/fixincl.x</span></samp> from
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<samp><span class="file">fixinc/inclhack.def</span></samp> and <samp><span class="file">fixinc/*.tpl</span></samp>.
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<p>Necessary to run ‘<samp><span class="samp">make check</span></samp>’ for <samp><span class="file">fixinc</span></samp>.
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<p>Necessary to regenerate the top level <samp><span class="file">Makefile.in</span></samp> file from
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<samp><span class="file">Makefile.tpl</span></samp> and <samp><span class="file">Makefile.def</span></samp>.
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<br><dt>GNU Bison version 1.28 (or later)<dd>
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Necessary when modifying <samp><span class="file">*.y</span></samp> files. Necessary to build the
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<code>treelang</code> front end (which is not enabled by default) from a
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checkout of the SVN repository; the generated files are not in the
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repository. They are included in releases.
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<p>Berkeley <samp><span class="command">yacc</span></samp> (<samp><span class="command">byacc</span></samp>) has been reported to work
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as well.
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<br><dt>Flex version 2.5.4 (or later)<dd>
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Necessary when modifying <samp><span class="file">*.l</span></samp> files.
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<p>Necessary to build GCC during development because the generated output
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files are not included in the SVN repository. They are included in
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releases.
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<br><dt>Texinfo version 4.4 (or later)<dd>
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Necessary for running <samp><span class="command">makeinfo</span></samp> when modifying <samp><span class="file">*.texi</span></samp>
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files to test your changes.
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<p>Necessary for running <samp><span class="command">make dvi</span></samp> or <samp><span class="command">make pdf</span></samp> to
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create printable documentation in DVI or PDF format. Texinfo version
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4.8 or later is required for <samp><span class="command">make pdf</span></samp>.
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<p>Necessary to build GCC documentation during development because the
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generated output files are not included in the SVN repository. They are
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included in releases.
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<br><dt>TeX (any working version)<dd>
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Necessary for running <samp><span class="command">texi2dvi</span></samp> and <samp><span class="command">texi2pdf</span></samp>, which
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are used when running <samp><span class="command">make dvi</span></samp> or <samp><span class="command">make pdf</span></samp> to create
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DVI or PDF files, respectively.
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<br><dt>SVN (any version)<dt>SSH (any version)<dd>
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Necessary to access the SVN repository. Public releases and weekly
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snapshots of the development sources are also available via FTP.
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<br><dt>Perl version 5.6.1 (or later)<dd>
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Necessary when regenerating <samp><span class="file">Makefile</span></samp> dependencies in libiberty.
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Necessary when regenerating <samp><span class="file">libiberty/functions.texi</span></samp>.
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Necessary when generating manpages from Texinfo manuals.
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Necessary when targetting Darwin, building libstdc++,
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and not using <samp><span class="option">--disable-symvers</span></samp>.
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Used by various scripts to generate some files included in SVN (mainly
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Unicode-related and rarely changing) from source tables.
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<br><dt>GNU diffutils version 2.7 (or later)<dd>
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Useful when submitting patches for the GCC source code.
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<br><dt>patch version 2.5.4 (or later)<dd>
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Necessary when applying patches, created with <samp><span class="command">diff</span></samp>, to one's
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own sources.
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<br><dt>ecj1<dt>gjavah<dd>
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If you wish to modify <samp><span class="file">.java</span></samp> files in libjava, you will need to
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configure with <samp><span class="option">--enable-java-maintainer-mode</span></samp>, and you will need
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to have executables named <samp><span class="command">ecj1</span></samp> and <samp><span class="command">gjavah</span></samp> in your path.
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The <samp><span class="command">ecj1</span></samp> executable should run the Eclipse Java compiler via
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the GCC-specific entry point. You can download a suitable jar from
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<a href="ftp://sourceware.org/pub/java/">ftp://sourceware.org/pub/java/</a>, or by running the script
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<samp><span class="command">contrib/download_ecj</span></samp>.
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</dl>
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<p><hr />
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<p><a href="./index.html">Return to the GCC Installation page</a>
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