6aa43d99a3
2002-12-16 Benjamin Kosnik <bkoz@redhat.com>
* configure.in (GLIBCPP_ENABLE_DEBUG): Default to none.
Call GLIBCPP_ENABLE_DEBUG_FLAGS.
* acinclude.m4 (GLIBCPP_ENABLE_DEBUG): GLIBCPP_BUILD_DEBUG, new
conditional if --enable-debug is yes. Rework.
(GLIBCPP_ENABLE_DEBUG_FLAGS): New.
* aclocal.m4: Regenerate.
* libio/Makefile.am: Remove DEBUG_FLAGS.
* libio/Makefile.in: Regenerate.
* libsupc++/Makefile.am: Remove DEBUG_FLAGS.
* libsupc++/Makefile.in: Regenerate.
* docs/html/configopts.html: Add docs for --enable-debug,
--enable-debug-flags.
2002-12-16 Benjamin Kosnik <bkoz@redhat.com>
Correct dependency tracking, build warts.
* configure.in: Correct repeated AC_OUTPUT thrashing by
config-ml.in
* configure: Regenerate.
* include/Makefile.am (stamp-target): Stamp in top_builddir.
* include/Makefile.in: Regenerate.
* src/Makefile.am (codecvt_members.cc): New rule.
(collate_members.cc): Same.
(ctype_members.cc): Same.
(messages_members.cc): Same.
(monetary_members.cc): Same.
(numeric_members.cc): Same.
(time_members.cc): Same.
(c++locale.cc): Same.
(basic_file.cc): Same.
* src/Makefile.in: Regenerate.
* acinclude.m4 (CCTYPE_CHAR_CC): Remove.
(CCCODECVT_CC): Don't link, AC_SUBST.
(CCOLLATE_CC): Same.
(CCTYPE_CC): Same.
(CMESSAGES_CC): Same.
(CMONEY_CC): Same.
(CNUMERIC_CC): Same.
(CTIME_CC): Same.
(CLOCALE_CC): Same.
* aclocal.m4: Regenerate.
* src/Makefile.am (libstdc___la_LIBADD): Use top_builddir
for convenience libraries.
(version_arg): Rename linker.map to libstdc++.ver.
(libstdc___la_DEPENDENCIES): Remove linker.map, add
libstdc++-symbol.ver as a dependency.
(libstdc++-symbol.ver): Add rule.
* acinclude.m4 (GLIBCPP_ENABLE_SYMVERS): Change LINKER_MAP to
SYMVER_MAP. Don't link, AC_SUBST.
* include/Makefile.am (target_headers_noinst): New.
(stamp-target): Add CLOCALE_INTERNAL_H.
* acinclude.m4 (GLIBCPP_ENABLE_CLOCALE): Don't link
CLOCALE_INTERNAL_H, AC_SUBST.
* config/locale/gnu/c_locale.cc: Modify c++locale_internal.h
include.
* config/locale/gnu/time_members.cc: Same.
* config/locale/gnu/numeric_members.cc: Same.
* config/locale/gnu/monetary_members.cc: Same.
* config/locale/gnu/messages_members.cc: Same.
* config/locale/gnu/ctype_members.cc: Same.
* config/locale/gnu/collate_members.cc: Same.
* config/locale/gnu/codecvt_members.cc: Same.
* config/locale/generic/codecvt_members.cc: Remove.
From-SVN: r60177
284 lines
12 KiB
HTML
284 lines
12 KiB
HTML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta name="AUTHOR" content="pme@gcc.gnu.org (Phil Edwards)" />
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<meta name="KEYWORDS" content="libstdc++, libstdc++-v3, GCC, g++" />
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<meta name="DESCRIPTION" content="Configuration options for libstdc++-v3." />
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<meta name="GENERATOR" content="vi and eight fingers" />
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<title>libstdc++-v3 configure options</title>
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<link rel="StyleSheet" href="lib3styles.css" />
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</head>
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<body>
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<h1 class="centered"><a name="top">Interesting <code>configure</code>
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options</a></h1>
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<p>The latest version of this document is always available at
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<a href="http://gcc.gnu.org/onlinedocs/libstdc++/configopts.html">
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http://gcc.gnu.org/onlinedocs/libstdc++/configopts.html</a>.
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</p>
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<p>To the <a href="http://gcc.gnu.org/libstdc++/">libstdc++-v3 homepage</a>.
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</p>
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<!-- ####################################################### -->
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<hr />
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<p>Here are some of the non-obvious options to libstdc++'s configure.
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Keep in mind that
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<!-- This SECnn should be the "Choosing Package Options" section. -->
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<a href="http://www.gnu.org/manual/autoconf/html_node/Package-Options.html#Package%20Options">they
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all have opposite forms as well</a>
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(enable/disable and with/without). The defaults are for current
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development sources.
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</p>
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<p>The canonical way to find out the configure options that are
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available for a given set of libstdc++ sources is to go to the
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source directory and then type:<code> ./configure --help</code>
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</p>
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<dl>
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<dt><code>--enable-multilib </code>[default]</dt>
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<dd><p>This is part of the generic multilib support for building cross
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compilers. As such, targets like "powerpc-elf" will have
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libstdc++ built many different ways: "-msoft-float"
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and not, etc. A different libstdc++ will be built for each of
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the different multilib versions. This option is on by default.
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</p>
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</dd>
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<dt><code>--enable-sjlj-exceptions </code></dt>
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<dd><p>Forces old, set-jump/long-jump exception handling model. If
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at all possible, the new, frame unwinding exception handling routines
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should be used instead, as they significantly reduce both
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runtime memory usage and executable size. This option can
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change the library ABI.
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</p>
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</dd>
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<dt><code>--enable-version-specific-runtime-libs </code></dt>
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<dd><p>Specify that run-time libraries should be installed in the
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compiler-specific subdirectory (i.e.,
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<code>${libdir}/gcc-lib/${target_alias}/${gcc_version}</code>)
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instead of <code>${libdir}</code>. This option is useful if you
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intend to use several versions of gcc in parallel. In addition,
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libstdc++'s include files will be installed in
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<code>${libdir}/gcc-lib/${target_alias}/${gcc_version}/include/g++</code>,
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unless you also specify
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<code>--with-gxx-include-dir=<em>dirname</em></code> during configuration.
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</p>
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</dd>
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<dt><code>--with-gxx-include-dir=<include-files dir></code></dt>
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<dd><p>Adds support for named libstdc++ include directory. For instance,
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the following puts all the libstdc++ headers into a directory
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called "2.97-20001008" instead of the usual
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"c++/(version)".
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</p>
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<pre>
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--with-gxx-include-dir=/foo/H-x86-gcc-3-c-gxx-inc/include/2.97-20001008</pre> </dd>
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<dt><code>--enable-cstdio </code></dt>
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<dd><p>This is an abbreviated form of <code>'--enable-cstdio=stdio'</code>
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(described next). This option can change the library ABI.
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</p>
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</dd>
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<dt><code>--enable-cstdio=OPTION </code></dt>
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<dd><p>Select a target-specific I/O package. As of libstdc++-v3
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snapshot 3.0.96, the choices are 'libio' to specify the GNU
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I/O package (from
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<a href="http://sources.redhat.com/glibc/">glibc</a>, the
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GNU C library), or 'stdio' to use a generic "C"
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abstraction. The default is 'stdio'. A longer explanation
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is <a href="explanations.html#cstdio">here</a>.
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</p>
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</dd>
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<dt><code>--enable-clocale </code></dt>
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<dd><p>This is an abbreviated form of <code>'--enable-clocale=generic'</code>
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(described next). This option can change the library ABI.
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</p>
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</dd>
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<dt><code>--enable-clocale=OPTION </code></dt>
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<dd><p>Select a target-specific underlying locale package. The
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choices are 'ieee_1003.1-2001' to specify an X/Open, Standard Unix
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(IEEE Std. 1003.1-2001) model based on langinfo/iconv/catgets,
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'gnu' to specify a model based on functionality from the GNU C
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library (langinfo/iconv/gettext) (from <a
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href="http://sources.redhat.com/glibc/">glibc</a>, the GNU C
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library), or 'generic' to use a generic "C"
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abstraction which consists of "C" locale info.
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</p>
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<p>As part of the configuration process, the "C" library is
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probed both for sufficient vintage, and installed locale
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data. If either of these elements are not present, the C++
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locale model default to 'generic.' On glibc-based systems of
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version 2.2.5 and above with installed locale files, 'gnu' is
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automatically selected.
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</p>
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</dd>
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<dt><code>--enable-cheaders=OPTION </code></dt>
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<dd><p>This allows the user to define what kind of C headers are
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used. Options are: c, c_std, and c_shadow. These correspond
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to the source directory's include/c, include/c_std, and
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include/c_shadow directories. The default is c_std.
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</p>
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</dd>
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<dt><code>--enable-threads </code></dt>
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<dd><p>This is an abbreviated form of <code>'--enable-threads=yes'</code>
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(described next). This option can change the library ABI.
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</p>
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</dd>
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<dt><code>--enable-threads=OPTION </code></dt>
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<dd><p>Select a threading library. A full description is given in the
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general <a href="http://gcc.gnu.org/install/configure.html">compiler
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configuration instructions</a>.
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</p>
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</dd>
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<dt><code>--enable-debug </code></dt>
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<dd><p>Build separate debug libraries in addition to what is normally built.
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By default, the debug libraries are compiled with
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<code> CXXFLAGS='-g3 -O0'</code>
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, are installed in <code>${libdir}/debug</code>, and have the
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same names and versioning information as the non-debug
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libraries. This option is off by default.
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<p>
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Note this make command, executed in
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the build directory, will do much the same thing, without the
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configuration difference and without building everything twice:
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<code>make CXXFLAGS='-g3 -O0' all</code>
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</p>
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</p>
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</dd>
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<dt><code>--enable-debug-flags=FLAGS</code></dt>
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<dd><p>This option is only valid when <code> --enable-debug </code>
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is also specified, and applies to the debug builds only. With
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this option, you can pass a specific string of flags to the
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compiler to use when building the debug versions of libstdc++.
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FLAGS is a quoted string of options, like
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</p>
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<pre>
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--enable-debug-flags='-g3 -O1 -gdwarf-2'</pre>
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</dd>
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<dt><code>--enable-cxx-flags=FLAGS</code></dt>
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<dd><p>With this option, you can pass a string of -f (functionality)
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flags to the compiler to use when building libstdc++. This
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option can change the library ABI. FLAGS is a quoted string of
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options, like
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</p>
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<pre>
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--enable-cxx-flags='-fvtable-gc -fomit-frame-pointer -ansi'</pre>
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<p>
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Note that the flags don't necessarily have to all be -f flags,
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as shown, but usually those are the ones that will make sense
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for experimentation and configure-time overriding.
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</p>
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<p>The advantage of --enable-cxx-flags over setting CXXFLAGS in
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the 'make' environment is that, if files are automatically
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rebuilt, the same flags will be used when compiling those files
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as well, so that everything matches.
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</p>
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<p>Fun flags to try might include combinations of
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</p>
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<pre>
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-fstrict-aliasing
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-fno-exceptions
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-ffunction-sections
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-fvtable-gc</pre>
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<p>and opposite forms (-fno-) of the same. Tell us (the libstdc++
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mailing list) if you discover more!
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</p>
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</dd>
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<dt><code>--enable-c99 </code></dt>
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<dd><p>The "long long" type was introduced in C99, along
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with many other functions for wide characters, and math
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classification macros, etc. If enabled, all C99 functions not
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specified by the C++ standard will be put into <code>namespace
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__gnu_cxx</code>, and then all these names will
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be injected into namespace std, so that C99 functions can be
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used "as if" they were in the C++ standard (as they
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will eventually be in some future revision of the standard,
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without a doubt). By default, C99 support is on, assuming the
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configure probes find all the necessary functions and bits
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necessary. This option can change the library ABI.
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</p>
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</dd>
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<dt><code>--enable-c-mbchar </code>[default]</dt>
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<dd><p>Certain template specializations are required for wide
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character conversion support. This is tricky and currently
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changing rapidly, and can cause problems on new platforms.
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Disabling wide character specializations is useful for initial
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porting steps, but builds only a subset of what is required by
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ISO. By default, this option is on. This option can change
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the library ABI.
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</p>
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</dd>
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<dt><code>--enable-long-long </code></dt>
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<dd><p>The "long long" type was introduced in C99. It is
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provided as a GNU extension to C++98 in g++. This flag builds
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support for "long long" into the library (specialized
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templates and the like for iostreams). This option is on by default:
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if enabled, users will have to either use the new-style "C"
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headers by default (i.e., <cmath> not <math.h>)
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or add appropriate compile-time flags to all compile lines to
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allow "C" visibility of this feature (on GNU/Linux,
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the flag is -D_ISOC99_SOURCE, which is added automatically via
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CPLUSPLUS_CPP_SPEC's addition of _GNU_SOURCE).
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This option can change the library ABI.
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</p>
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</dd>
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<dt><code>--enable-concept-checks </code></dt>
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<dd><p>This turns on additional compile-time checks for instantiated
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library templates, in the form of specialized templates,
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<a href="19_diagnostics/howto.html#3">described here</a>. They
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can help users discover when they break the rules of the STL, before
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their programs run.
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</p>
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</dd>
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<dt><code>--enable-symvers[=style] </code></dt>
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<dd><p>In 3.1 and later, tries to turn on symbol versioning in the
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shared library (if a shared library has been requested). The
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only 'style' currently supported is 'gnu' which requires that
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a recent version of the GNU linker be in use. With no style
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given, the configure script will try to guess if the 'gnu'
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style can be used, and if so, will turn it on. Hopefully
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people will volunteer to do other 'style' options.
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</p>
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</dd>
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</dl>
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<p>Return <a href="#top">to the top of the page</a> or
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<a href="http://gcc.gnu.org/libstdc++/">to the libstdc++ homepage</a>.
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</p>
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<!-- ####################################################### -->
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<hr />
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<p class="fineprint"><em>
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See <a href="17_intro/license.html">license.html</a> for copying conditions.
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Comments and suggestions are welcome, and may be sent to
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<a href="mailto:libstdc++@gcc.gnu.org">the libstdc++ mailing list</a>.
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</em></p>
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</body>
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</html>
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