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<title>Debugging with GDB: Requirements</title>
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<a name="Requirements"></a>
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<div class="header">
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<p>
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Next: <a href="Running-Configure.html#Running-Configure" accesskey="n" rel="next">Running Configure</a>, Up: <a href="Installing-GDB.html#Installing-GDB" accesskey="u" rel="up">Installing GDB</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Requirements-for-Building-GDB"></a>
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<h3 class="section">C.1 Requirements for Building <small>GDB</small></h3>
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<a name="index-building-GDB_002c-requirements-for"></a>
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<p>Building <small>GDB</small> requires various tools and packages to be available.
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Other packages will be used only if they are found.
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</p>
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<a name="Tools_002fPackages-Necessary-for-Building-GDB"></a>
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<h3 class="heading">Tools/Packages Necessary for Building <small>GDB</small></h3>
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<dl compact="compact">
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<dt>C<tt>++</tt>11 compiler</dt>
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<dd><p><small>GDB</small> is written in C<tt>++</tt>11. It should be buildable with any
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recent C<tt>++</tt>11 compiler, e.g. GCC.
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</p>
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</dd>
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<dt>GNU make</dt>
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<dd><p><small>GDB</small>’s build system relies on features only found in the GNU
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make program. Other variants of <code>make</code> will not work.
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</p></dd>
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</dl>
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<a name="Tools_002fPackages-Optional-for-Building-GDB"></a>
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<h3 class="heading">Tools/Packages Optional for Building <small>GDB</small></h3>
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<dl compact="compact">
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<dt>Expat</dt>
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<dd><a name="Expat"></a><p><small>GDB</small> can use the Expat XML parsing library. This library may be
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included with your operating system distribution; if it is not, you
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can get the latest version from <a href="http://expat.sourceforge.net">http://expat.sourceforge.net</a>.
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The <samp>configure</samp> script will search for this library in several
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standard locations; if it is installed in an unusual path, you can
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use the <samp>--with-libexpat-prefix</samp> option to specify its location.
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</p>
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<p>Expat is used for:
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</p>
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<ul>
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<li> Remote protocol memory maps (see <a href="Memory-Map-Format.html#Memory-Map-Format">Memory Map Format</a>)
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</li><li> Target descriptions (see <a href="Target-Descriptions.html#Target-Descriptions">Target Descriptions</a>)
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</li><li> Remote shared library lists (See <a href="Library-List-Format.html#Library-List-Format">Library List Format</a>,
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or alternatively see <a href="Library-List-Format-for-SVR4-Targets.html#Library-List-Format-for-SVR4-Targets">Library List Format for SVR4 Targets</a>)
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</li><li> MS-Windows shared libraries (see <a href="Files.html#Shared-Libraries">Shared Libraries</a>)
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</li><li> Traceframe info (see <a href="Traceframe-Info-Format.html#Traceframe-Info-Format">Traceframe Info Format</a>)
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</li><li> Branch trace (see <a href="Branch-Trace-Format.html#Branch-Trace-Format">Branch Trace Format</a>,
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see <a href="Branch-Trace-Configuration-Format.html#Branch-Trace-Configuration-Format">Branch Trace Configuration Format</a>)
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</li></ul>
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</dd>
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<dt>Guile</dt>
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<dd><p><small>GDB</small> can be scripted using GNU Guile. See <a href="Guile.html#Guile">Guile</a>. By
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default, <small>GDB</small> will be compiled if the Guile libraries are
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installed and are found by <samp>configure</samp>. You can use the
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<code>--with-guile</code> option to request Guile, and pass either the Guile
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version number or the file name of the relevant <code>pkg-config</code>
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program to choose a particular version of Guile.
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</p>
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</dd>
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<dt>iconv</dt>
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<dd><p><small>GDB</small>’s features related to character sets (see <a href="Character-Sets.html#Character-Sets">Character Sets</a>) require a functioning <code>iconv</code> implementation. If you are
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on a GNU system, then this is provided by the GNU C Library. Some
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other systems also provide a working <code>iconv</code>.
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</p>
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<p>If <small>GDB</small> is using the <code>iconv</code> program which is installed
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in a non-standard place, you will need to tell <small>GDB</small> where to
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find it. This is done with <samp>--with-iconv-bin</samp> which specifies
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the directory that contains the <code>iconv</code> program. This program is
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run in order to make a list of the available character sets.
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</p>
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<p>On systems without <code>iconv</code>, you can install GNU Libiconv. If
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Libiconv is installed in a standard place, <small>GDB</small> will
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automatically use it if it is needed. If you have previously
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installed Libiconv in a non-standard place, you can use the
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<samp>--with-libiconv-prefix</samp> option to <samp>configure</samp>.
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</p>
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<p><small>GDB</small>’s top-level <samp>configure</samp> and <samp>Makefile</samp> will
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arrange to build Libiconv if a directory named <samp>libiconv</samp> appears
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in the top-most source directory. If Libiconv is built this way, and
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if the operating system does not provide a suitable <code>iconv</code>
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implementation, then the just-built library will automatically be used
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by <small>GDB</small>. One easy way to set this up is to download GNU
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Libiconv, unpack it inside the top-level directory of the <small>GDB</small>
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source tree, and then rename the directory holding the Libiconv source
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code to ‘<samp>libiconv</samp>’.
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</p>
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</dd>
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<dt>lzma</dt>
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<dd><p><small>GDB</small> can support debugging sections that are compressed with
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the LZMA library. See <a href="MiniDebugInfo.html#MiniDebugInfo">MiniDebugInfo</a>. If this library is not
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included with your operating system, you can find it in the xz package
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at <a href="http://tukaani.org/xz/">http://tukaani.org/xz/</a>. If the LZMA library is available in
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the usual place, then the <samp>configure</samp> script will use it
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automatically. If it is installed in an unusual path, you can use the
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<samp>--with-lzma-prefix</samp> option to specify its location.
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</p>
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</dd>
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<dt>MPFR</dt>
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<dd><a name="MPFR"></a><p><small>GDB</small> can use the GNU MPFR multiple-precision floating-point
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library. This library may be included with your operating system
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distribution; if it is not, you can get the latest version from
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<a href="http://www.mpfr.org">http://www.mpfr.org</a>. The <samp>configure</samp> script will search
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for this library in several standard locations; if it is installed
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in an unusual path, you can use the <samp>--with-libmpfr-prefix</samp>
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option to specify its location.
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</p>
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<p>GNU MPFR is used to emulate target floating-point arithmetic during
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expression evaluation when the target uses different floating-point
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formats than the host. If GNU MPFR it is not available, <small>GDB</small>
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will fall back to using host floating-point arithmetic.
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</p>
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</dd>
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<dt>Python</dt>
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<dd><p><small>GDB</small> can be scripted using Python language. See <a href="Python.html#Python">Python</a>.
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By default, <small>GDB</small> will be compiled if the Python libraries are
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installed and are found by <samp>configure</samp>. You can use the
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<code>--with-python</code> option to request Python, and pass either the
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file name of the relevant <code>python</code> executable, or the name of the
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directory in which Python is installed, to choose a particular
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installation of Python.
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</p>
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</dd>
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<dt>zlib</dt>
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<dd><a name="index-compressed-debug-sections"></a>
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<p><small>GDB</small> will use the ‘<samp>zlib</samp>’ library, if available, to read
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compressed debug sections. Some linkers, such as GNU gold, are capable
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of producing binaries with compressed debug sections. If <small>GDB</small>
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is compiled with ‘<samp>zlib</samp>’, it will be able to read the debug
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information in such binaries.
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</p>
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<p>The ‘<samp>zlib</samp>’ library is likely included with your operating system
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distribution; if it is not, you can get the latest version from
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<a href="http://zlib.net">http://zlib.net</a>.
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</p></dd>
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</dl>
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<p>
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Next: <a href="Running-Configure.html#Running-Configure" accesskey="n" rel="next">Running Configure</a>, Up: <a href="Installing-GDB.html#Installing-GDB" accesskey="u" rel="up">Installing GDB</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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