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| <a name="Configure-Options"></a> |
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| |
| <h3 class="section">C.5 <samp><span class="file">configure</span></samp> Options</h3> |
| |
| <p>Here is a summary of the <samp><span class="file">configure</span></samp> options and arguments that |
| are most often useful for building <span class="sc">gdb</span>. <samp><span class="file">configure</span></samp> |
| also has several other options not listed here. see <a href="../autoconf.info/Running-configure-scripts.html#Running-configure-scripts">Running configure scripts</a>, for a full |
| explanation of <samp><span class="file">configure</span></samp>. |
| |
| <pre class="smallexample"> configure <span class="roman">[</span>--help<span class="roman">]</span> |
| <span class="roman">[</span>--prefix=<var>dir</var><span class="roman">]</span> |
| <span class="roman">[</span>--exec-prefix=<var>dir</var><span class="roman">]</span> |
| <span class="roman">[</span>--srcdir=<var>dirname</var><span class="roman">]</span> |
| <span class="roman">[</span>--target=<var>target</var><span class="roman">]</span> |
| </pre> |
| <p class="noindent">You may introduce options with a single ‘<samp><span class="samp">-</span></samp>’ rather than |
| ‘<samp><span class="samp">--</span></samp>’ if you prefer; but you may abbreviate option names if you use |
| ‘<samp><span class="samp">--</span></samp>’. |
| |
| <dl> |
| <dt><code>--help</code><dd>Display a quick summary of how to invoke <samp><span class="file">configure</span></samp>. |
| |
| <br><dt><code>--prefix=</code><var>dir</var><dd>Configure the source to install programs and files under directory |
| <samp><var>dir</var></samp>. |
| |
| <br><dt><code>--exec-prefix=</code><var>dir</var><dd>Configure the source to install programs under directory |
| <samp><var>dir</var></samp>. |
| |
| <!-- avoid splitting the warning from the explanation: --> |
| <br><dt><code>--srcdir=</code><var>dirname</var><dd>Use this option to make configurations in directories separate from the |
| <span class="sc">gdb</span> source directories. Among other things, you can use this to |
| build (or maintain) several configurations simultaneously, in separate |
| directories. <samp><span class="file">configure</span></samp> writes configuration-specific files in |
| the current directory, but arranges for them to use the source in the |
| directory <var>dirname</var>. <samp><span class="file">configure</span></samp> creates directories under |
| the working directory in parallel to the source directories below |
| <var>dirname</var>. |
| |
| <br><dt><code>--target=</code><var>target</var><dd>Configure <span class="sc">gdb</span> for cross-debugging programs running on the specified |
| <var>target</var>. Without this option, <span class="sc">gdb</span> is configured to debug |
| programs that run on the same machine (<var>host</var>) as <span class="sc">gdb</span> itself. |
| |
| <p>There is no convenient way to generate a list of all available |
| targets. Also see the <code>--enable-targets</code> option, below. |
| </dl> |
| |
| <p>There are many other options that are specific to <span class="sc">gdb</span>. This |
| lists just the most common ones; there are some very specialized |
| options not described here. |
| |
| <dl> |
| <dt><code>--enable-targets=</code><span class="roman">[</span><var>target</var><span class="roman">]</span><code>...</code><dt><code>--enable-targets=all</code><dd>Configure <span class="sc">gdb</span> for cross-debugging programs running on the |
| specified list of targets. The special value ‘<samp><span class="samp">all</span></samp>’ configures |
| <span class="sc">gdb</span> for debugging programs running on any target it supports. |
| |
| <br><dt><code>--with-gdb-datadir=</code><var>path</var><dd>Set the <span class="sc">gdb</span>-specific data directory. <span class="sc">gdb</span> will look |
| here for certain supporting files or scripts. This defaults to the |
| <samp><span class="file">gdb</span></samp> subdirectory of ‘<samp><span class="samp">datadi</span></samp>’ (which can be set using |
| <code>--datadir</code>). |
| |
| <br><dt><code>--with-relocated-sources=</code><var>dir</var><dd>Sets up the default source path substitution rule so that directory |
| names recorded in debug information will be automatically adjusted for |
| any directory under <var>dir</var>. <var>dir</var> should be a subdirectory of |
| <span class="sc">gdb</span>'s configured prefix, the one mentioned in the |
| <code>--prefix</code> or <code>--exec-prefix</code> options to configure. This |
| option is useful if GDB is supposed to be moved to a different place |
| after it is built. |
| |
| <br><dt><code>--enable-64-bit-bfd</code><dd>Enable 64-bit support in BFD on 32-bit hosts. |
| |
| <br><dt><code>--disable-gdbmi</code><dd>Build <span class="sc">gdb</span> without the GDB/MI machine interface |
| (see <a href="GDB_002fMI.html#GDB_002fMI">GDB/MI</a>). |
| |
| <br><dt><code>--enable-tui</code><dd>Build <span class="sc">gdb</span> with the text-mode full-screen user interface |
| (TUI). Requires a curses library (ncurses and cursesX are also |
| supported). |
| |
| <br><dt><code>--with-curses</code><dd>Use the curses library instead of the termcap library, for text-mode |
| terminal operations. |
| |
| <br><dt><code>--with-libunwind-ia64</code><dd>Use the libunwind library for unwinding function call stack on ia64 |
| target platforms. See http://www.nongnu.org/libunwind/index.html for |
| details. |
| |
| <br><dt><code>--with-system-readline</code><dd>Use the readline library installed on the host, rather than the |
| library supplied as part of <span class="sc">gdb</span>. |
| |
| <br><dt><code>--with-system-zlib</code><dd>Use the zlib library installed on the host, rather than the library |
| supplied as part of <span class="sc">gdb</span>. |
| |
| <br><dt><code>--with-expat</code><dd>Build <span class="sc">gdb</span> with Expat, a library for XML parsing. (Done by |
| default if libexpat is installed and found at configure time.) This |
| library is used to read XML files supplied with <span class="sc">gdb</span>. If it |
| is unavailable, some features, such as remote protocol memory maps, |
| target descriptions, and shared library lists, that are based on XML |
| files, will not be available in <span class="sc">gdb</span>. If your host does not |
| have libexpat installed, you can get the latest version from |
| `http://expat.sourceforge.net'. |
| |
| <br><dt><code>--with-libiconv-prefix</code><span class="roman">[</span><code>=</code><var>dir</var><span class="roman">]</span><dd> |
| Build <span class="sc">gdb</span> with GNU libiconv, a character set encoding |
| conversion library. This is not done by default, as on GNU systems |
| the <code>iconv</code> that is built in to the C library is sufficient. If |
| your host does not have a working <code>iconv</code>, you can get the latest |
| version of GNU iconv from `https://www.gnu.org/software/libiconv/'. |
| |
| <p><span class="sc">gdb</span>'s build system also supports building GNU libiconv as |
| part of the overall build. See <a href="Requirements.html#Requirements">Requirements</a>. |
| |
| <br><dt><code>--with-lzma</code><dd>Build <span class="sc">gdb</span> with LZMA, a compression library. (Done by default |
| if liblzma is installed and found at configure time.) LZMA is used by |
| <span class="sc">gdb</span>'s "mini debuginfo" feature, which is only useful on |
| platforms using the ELF object file format. If your host does not |
| have liblzma installed, you can get the latest version from |
| `https://tukaani.org/xz/'. |
| |
| <br><dt><code>--with-mpfr</code><dd>Build <span class="sc">gdb</span> with GNU MPFR, a library for multiple-precision |
| floating-point computation with correct rounding. (Done by default if |
| GNU MPFR is installed and found at configure time.) This library is |
| used to emulate target floating-point arithmetic during expression |
| evaluation when the target uses different floating-point formats than |
| the host. If GNU MPFR is not available, <span class="sc">gdb</span> will fall back |
| to using host floating-point arithmetic. If your host does not have |
| GNU MPFR installed, you can get the latest version from |
| `http://www.mpfr.org'. |
| |
| <br><dt><code>--with-python</code><span class="roman">[</span><code>=</code><var>python</var><span class="roman">]</span><dd>Build <span class="sc">gdb</span> with Python scripting support. (Done by default if |
| libpython is present and found at configure time.) Python makes |
| <span class="sc">gdb</span> scripting much more powerful than the restricted CLI |
| scripting language. If your host does not have Python installed, you |
| can find it on `http://www.python.org/download/'. The oldest version |
| of Python supported by GDB is 2.6. The optional argument <var>python</var> |
| is used to find the Python headers and libraries. It can be either |
| the name of a Python executable, or the name of the directory in which |
| Python is installed. |
| |
| <br><dt><code>--with-guile[=GUILE]'</code><dd>Build <span class="sc">gdb</span> with GNU Guile scripting support. (Done by default |
| if libguile is present and found at configure time.) If your host |
| does not have Guile installed, you can find it at |
| `https://www.gnu.org/software/guile/'. The optional argument GUILE |
| can be a version number, which will cause <code>configure</code> to try to |
| use that version of Guile; or the file name of a <code>pkg-config</code> |
| executable, which will be queried to find the information needed to |
| compile and link against Guile. |
| |
| <br><dt><code>--without-included-regex</code><dd>Don't use the regex library included with <span class="sc">gdb</span> (as part of the |
| libiberty library). This is the default on hosts with version 2 of |
| the GNU C library. |
| |
| <br><dt><code>--with-sysroot=</code><var>dir</var><dd>Use <var>dir</var> as the default system root directory for libraries whose |
| file names begin with <samp><span class="file">/lib</span></samp>' or <samp><span class="file">/usr/lib'</span></samp>. (The value of |
| <var>dir</var> can be modified at run time by using the <samp><span class="command">set |
| sysroot</span></samp> command.) If <var>dir</var> is under the <span class="sc">gdb</span> configured |
| prefix (set with <code>--prefix</code> or <code>--exec-prefix options</code>, the |
| default system root will be automatically adjusted if and when |
| <span class="sc">gdb</span> is moved to a different location. |
| |
| <br><dt><code>--with-system-gdbinit=</code><var>file</var><dd>Configure <span class="sc">gdb</span> to automatically load a system-wide init file. |
| <var>file</var> should be an absolute file name. If <var>file</var> is in a |
| directory under the configured prefix, and <span class="sc">gdb</span> is moved to |
| another location after being built, the location of the system-wide |
| init file will be adjusted accordingly. |
| |
| <br><dt><code>--enable-build-warnings</code><dd>When building the <span class="sc">gdb</span> sources, ask the compiler to warn about |
| any code which looks even vaguely suspicious. It passes many |
| different warning flags, depending on the exact version of the |
| compiler you are using. |
| |
| <br><dt><code>--enable-werror</code><dd>Treat compiler warnings as werrors. It adds the <code>-Werror</code> flag |
| to the compiler, which will fail the compilation if the compiler |
| outputs any warning messages. |
| |
| <br><dt><code>--enable-ubsan</code><dd>Enable the GCC undefined behavior sanitizer. This is disabled by |
| default, but passing <code>--enable-ubsan=yes</code> or |
| <code>--enable-ubsan=auto</code> to <code>configure</code> will enable it. The |
| undefined behavior sanitizer checks for C<tt>++</tt> undefined behavior. |
| It has a performance cost, so if you are looking at <span class="sc">gdb</span>'s |
| performance, you should disable it. The undefined behavior sanitizer |
| was first introduced in GCC 4.9. |
| </dl> |
| |
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