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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>Compiling the GLib package: GLib Reference Manual</title>
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Compiling the GLib package
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Compiling the GLib Package — How to compile GLib itself
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Building the Library on UNIX
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On UNIX, GLib uses the standard GNU build system,
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using autoconf for package
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configuration and resolving portability issues,
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automake for building makefiles
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that comply with the GNU Coding Standards, and
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libtool for building shared
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libraries on multiple platforms. The normal sequence for
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compiling and installing the GLib library is thus:
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./configure
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make
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make install
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The standard options provided by GNU
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autoconf may be passed to the
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configure script. Please see the
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autoconf documentation or run
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./configure --help for information about
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the standard options.
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GLib is compiled with
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strict aliasing
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disabled. It is strongly recommended that this is not re-enabled by
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overriding the compiler flags, as GLib has not been tested with strict
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aliasing and cannot be guaranteed to work.
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The GTK+ documentation contains
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further details
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about the build process and ways to influence it.
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Dependencies
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Before you can compile the GLib library, you need to have
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various other tools and libraries installed on your system.
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If you are building from a release archive, you will need
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a compliant C toolchain,
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GNU Make, and pkg-config;
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if you are building directly from a Git repository clone
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of GLib, you will also need the GNU Autotools mentioned
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above.
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pkg-config
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is a tool for tracking the compilation flags needed for
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libraries that are used by the GLib library. (For each
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library, a small .pc text file is
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installed in a standard location that contains the compilation
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flags needed for that library along with version number
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information).
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The GLib Makefiles make use of several features specific to
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GNU
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make, and will not build correctly with other
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versions of make. You will need to
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install it if you don't already have it on your system. (It
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may be called gmake rather than
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make.)
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A UNIX build of GLib requires that the system implements at
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least the original 1990 version of POSIX. Beyond this, it
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depends on a number of other libraries.
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The GNU
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libiconv library is needed to build GLib if your
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system doesn't have the iconv()
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function for doing conversion between character
|
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encodings. Most modern systems should have
|
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iconv(), however many older systems lack
|
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an iconv() implementation. On such systems,
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you must install the libiconv library. This can be found at:
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http://www.gnu.org/software/libiconv.
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If your system has an iconv() implementation but
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you want to use libiconv instead, you can pass the
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--with-libiconv option to configure. This forces
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libiconv to be used.
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Note that if you have libiconv installed in your default include
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search path (for instance, in /usr/local/), but
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don't enable it, you will get an error while compiling GLib because
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the iconv.h that libiconv installs hides the
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system iconv.
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If you are using the native iconv implementation on Solaris
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instead of libiconv, you'll need to make sure that you have
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the converters between locale encodings and UTF-8 installed.
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At a minimum you'll need the SUNWuiu8 package. You probably
|
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should also install the SUNWciu8, SUNWhiu8, SUNWjiu8, and
|
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SUNWkiu8 packages.
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The native iconv on Compaq Tru64 doesn't contain support for
|
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UTF-8, so you'll need to use GNU libiconv instead. (When
|
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using GNU libiconv for GLib, you'll need to use GNU libiconv
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for GNU gettext as well.) This probably applies to related
|
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operating systems as well.
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The libintl library from the GNU gettext
|
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package is needed if your system doesn't have the
|
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gettext() functionality for handling
|
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message translation databases.
|
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A thread implementation is needed. The thread support in GLib
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can be based upon POSIX threads or win32 threads.
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|
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GRegex uses the PCRE library
|
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for regular expression matching. The default is to use the system
|
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version of PCRE, to reduce the chances of security fixes going out
|
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of sync. GLib additionally provides an internal copy of PCRE in case
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the system version is too old, or does not support UTF-8; the internal
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copy is patched to use GLib for memory management and to share the
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same Unicode tables.
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The optional extended attribute support in GIO requires the
|
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getxattr() family of functions that may be
|
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provided by the C library or by the standalone libattr library. To
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build GLib without extended attribute support, use the
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--disable-xattr option.
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The optional SELinux support in GIO requires libselinux.
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To build GLib without SELinux support, use the
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--disable-selinux option.
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The optional support for DTrace requires the
|
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sys/sdt.h header, which is provided
|
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by SystemTap on Linux. To build GLib without DTrace, use
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the --disable-dtrace configure option.
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The optional support for
|
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SystemTap
|
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can be disabled with the --disable-systemtap
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configure option. Additionally, you can control the location
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where GLib installs the SystemTap probes, using the
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--with-tapset-install-dir=DIR configure option.
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Extra Configuration Options
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In addition to the normal options, the
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configure script in the GLib
|
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library supports these additional arguments:
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--enable-debug.
|
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Turns on various amounts of debugging support. Setting this to 'no'
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disables g_assert(), g_return_if_fail(),
|
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g_return_val_if_fail() and all cast checks
|
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between different object types. Setting it to 'minimum' disables
|
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only cast checks. Setting it to 'yes' enables runtime debugging.
|
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The default is 'minimum' for stable releases, and 'yes' for development
|
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snapshots. Note that 'no' is fast, but dangerous as it tends to destabilize
|
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even mostly bug-free software by changing the effect of many bugs
|
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from simple warnings into fatal crashes. Thus
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--enable-debug=no should not
|
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be used for stable releases of GLib.
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--disable-gc-friendly and
|
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--enable-gc-friendly.
|
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By default, and with --disable-gc-friendly
|
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as well, GLib does not clear the memory for certain objects before
|
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they are freed. For example, GLib may decide to recycle GList nodes
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by putting them in a free list. However, memory profiling and debugging
|
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tools like Valgrind work
|
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better if an application does not keep dangling pointers to freed
|
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memory (even though these pointers are no longer dereferenced), or
|
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invalid pointers inside uninitialized memory.
|
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The --enable-gc-friendly option makes GLib
|
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clear memory in these situations:
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When shrinking a GArray, GLib will clear the memory no longer
|
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available in the array: shrink an array from 10 bytes to 7, and
|
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the last 3 bytes will be cleared. This includes removals of single
|
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and multiple elements.
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When growing a GArray, GLib will clear the new chunk of memory.
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Grow an array from 7 bytes to 10 bytes, and the last 3 bytes will
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be cleared.
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The above applies to GPtrArray as well.
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When freeing a node from a GHashTable, GLib will first clear
|
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the node, which used to have pointers to the key and the value
|
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stored at that node.
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When destroying or removing a GTree node, GLib will clear the node,
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which used to have pointers to the node's value, and the left and
|
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right subnodes.
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Since clearing the memory has a cost,
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--disable-gc-friendly is the default.
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--disable-mem-pools and
|
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--enable-mem-pools.
|
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Many small chunks of memory are often allocated via collective pools
|
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in GLib and are cached after release to speed up reallocations.
|
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For sparse memory systems this behaviour is often inferior, so
|
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memory pools can be disabled to avoid excessive caching and force
|
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atomic maintenance of chunks through the g_malloc()
|
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and g_free() functions. Code currently affected by
|
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this:
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GMemChunks become basically non-effective
|
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GSignal disables all caching
|
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(potentially very slow)
|
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GType doesn't honour the
|
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GTypeInfo
|
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n_preallocs field anymore
|
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the GBSearchArray flag
|
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G_BSEARCH_ALIGN_POWER2 becomes non-functional
|
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--with-threads.
|
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Specify a thread implementation to use. Available options are
|
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'posix' or 'win32'. Normally, configure
|
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should be able to work out the system threads API on its own.
|
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--with-pcre.
|
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Specify whether to use the internal or the system-supplied
|
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PCRE library.
|
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'internal' means that GRegex will be compiled to use
|
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the internal PCRE library.
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'system' means that GRegex will be compiled to use
|
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the system-supplied PCRE library; this is the default
|
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setting.
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Using the internal PCRE is the preferred solution if:
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your system has strict resource constraints; the system-supplied
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PCRE has a separated copy of the tables used for Unicode
|
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handling, whereas the internal copy shares the Unicode tables
|
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used by GLib.
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your system has PCRE built without some needed features,
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such as UTF-8 and Unicode support.
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you are planning to use both GRegex and PCRE API at the same
|
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time, either directly or indirectly through a dependency; PCRE
|
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uses some global variables for memory management and
|
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other features, and if both GLib and PCRE try to access them
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at the same time, this could lead to undefined behavior.
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--disable-included-printf and
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--enable-included-printf.
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By default the configure script will try
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to auto-detect whether the C library provides a suitable set
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of printf() functions. In detail,
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configure checks that the semantics of
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snprintf() are as specified by C99
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and that positional parameters as specified in the Single Unix
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Specification are supported. If this not the case, GLib will
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include an implementation of the printf()
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family.
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These options can be used to explicitly control whether
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an implementation of the printf() family
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should be included or not.
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--disable-Bsymbolic and
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--enable-Bsymbolic.
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By default, GLib uses the -Bsymbolic-functions
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linker flag to avoid intra-library PLT jumps. A side-effect
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of this is that it is no longer possible to override
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internal uses of GLib functions with
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LD_PRELOAD. Therefore, it may make
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sense to turn this feature off in some situations.
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The --disable-Bsymbolic option allows
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to do that.
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--disable-gtk-doc and
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--enable-gtk-doc.
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By default the configure script will try
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to auto-detect whether the
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gtk-doc package is installed.
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If it is, then it will use it to extract and build the
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documentation for the GLib library. These options
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can be used to explicitly control whether
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gtk-doc should be
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used or not. If it is not used, the distributed,
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pre-generated HTML files will be installed instead of
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building them on your machine.
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--disable-man and
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--enable-man.
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By default the configure script will try
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to auto-detect whether xsltproc
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and the necessary Docbook stylesheets are installed.
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If they are, then it will use them to rebuild the included
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man pages from the XML sources. These options can be used
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to explicitly control whether man pages should be rebuilt
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used or not. The distribution includes pre-generated man
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pages.
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--disable-xattr and
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--enable-xattr.
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By default the configure script will try
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to auto-detect whether the getxattr()
|
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family of functions is available. If it is, then extended
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attribute support will be included in GIO. These options can
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be used to explicitly control whether extended attribute
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support should be included or not. getxattr()
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and friends can be provided by glibc or by the standalone
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libattr library.
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--disable-selinux and
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--enable-selinux.
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By default the configure script will
|
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auto-detect if libselinux is available and include
|
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SELinux support in GIO if it is. These options can be
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used to explicitly control whether SELinux support should
|
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be included.
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--disable-dtrace and
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--enable-dtrace.
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By default the configure script will
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detect if DTrace support is available, and use it.
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--disable-systemtap and
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--enable-systemtap.
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This option requires DTrace support. If it is available, then
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the configure script will also check for
|
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the presence of SystemTap.
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--enable-coverage and
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--disable-coverage.
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Enable the generation of coverage reports for the GLib tests.
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This requires the lcov frontend to gcov from the
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Linux Test Project.
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To generate a coverage report, use the lcov make target. The
|
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report is placed in the glib-lcov directory.
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--with-runtime-libdir=RELPATH.
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Allows specifying a relative path to where to install the runtime
|
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libraries (meaning library files used for running, not developing,
|
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GLib applications). This can be used in operating system setups where
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programs using GLib needs to run before e.g. /usr
|
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is mounted.
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For example, if LIBDIR is /usr/lib and
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../../lib is passed to
|
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--with-runtime-libdir then the
|
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runtime libraries are installed into /lib rather
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than /usr/lib.
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|
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--with-python=PATH.
|
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Allows specifying the Python interpreter to use, either as an absolute path,
|
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or as a program name. GLib can be built with Python 2 (at least version 2.7)
|
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or, preferably, with Python 3.
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Generated by GTK-Doc V1.27
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</body>
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</html>
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