4 This is GLib version @GLIB_VERSION@. GLib is the low-level core
5 library that forms the basis for projects such as GTK+ and GNOME. It
6 provides data structure handling for C, portability wrappers, and
7 interfaces for such runtime functionality as an event loop, threads,
8 dynamic loading, and an object system.
10 The official ftp site is:
11 ftp://ftp.gtk.org/pub/glib
13 The official web site is:
16 Information about mailing lists can be found at
17 http://www.gtk.org/mailing-lists.html
19 To subscribe: mail -s subscribe gtk-list-request@gnome.org < /dev/null
20 (Send mail to gtk-list-request@gnome.org with the subject "subscribe")
25 See the file 'INSTALL'
30 * GObject includes a generic marshaller, g_cclosure_marshal_generic.
31 To use it, simply specify NULL as the marshaller in g_signal_new().
32 The generic marshaller is implemented with libffi, and consequently
33 GObject depends on libffi now.
38 * The GApplication API has changed compared to the version that was
39 included in the 2.25 development snapshots. Existing users will need
50 * It is now allowed to call g_thread_init(NULL) multiple times, and
51 to call glib functions before g_thread_init(NULL) is called
52 (although the later is mainly a change in docs as this worked before
53 too). See the GThread reference documentation for the details.
55 * GObject now links to GThread and threads are enabled automatically
56 when g_type_init() is called.
58 * GObject no longer allows to call g_object_set() on construct-only properties
59 while an object is being initialized. If this behavior is needed, setting a
60 custom constructor that just chains up will re-enable this functionality.
62 * GMappedFile on an empty file now returns NULL for the contents instead of
63 returning an empty string. The documentation specifically states that code
64 may not rely on nul-termination here so any breakage caused by this change
65 is a bug in application code.
70 * Repeated calls to g_simple_async_result_set_op_res_gpointer used
71 to leak the data. This has been fixed to always call the provided
77 * The functions for launching applications (e.g. g_app_info_launch() +
78 friends) now passes a FUSE file:// URI if possible (requires gvfs
79 with the FUSE daemon to be running and operational). With gvfs 2.26,
80 FUSE file:// URIs will be mapped back to gio URIs in the GFile
81 constructors. The intent of this change is to better integrate
82 POSIX-only applications, see bug #528670 for the rationale. The
83 only user-visible change is when an application needs to examine an
84 URI passed to it (e.g. as a positional parameter). Instead of
85 looking at the given URI, the application will now need to look at
86 the result of g_file_get_uri() after having constructed a GFile
87 object with the given URI.
92 * The recommended way of using GLib has always been to only include the
93 toplevel headers glib.h, glib-object.h and gio.h. GLib enforces this by
94 generating an error when individual headers are directly included.
95 To help with the transition, the enforcement is not turned on by
96 default for GLib headers (it is turned on for GObject and GIO).
97 To turn it on, define the preprocessor symbol G_DISABLE_SINGLE_INCLUDES.
100 =====================
102 * GLib now includes GIO, which adds optional dependencies against libattr
103 and libselinux for extended attribute and SELinux support. Use
104 --disable-xattr and --disable-selinux to build without these.
106 Notes about GLib 2.10
107 =====================
109 * The functions g_snprintf() and g_vsnprintf() have been removed from
110 the gprintf.h header, since they are already declared in glib.h. This
111 doesn't break documented use of gprintf.h, but people have been known
112 to include gprintf.h without including glib.h.
114 * The Unicode support has been updated to Unicode 4.1. This adds several
115 new members to the GUnicodeBreakType enumeration.
117 * The support for Solaris threads has been retired. Solaris has provided
118 POSIX threads for long enough now to have them available on every
121 * 'make check' has been changed to validate translations by calling
122 msgfmt with the -c option. As a result, it may fail on systems with
123 older gettext implementations (GNU gettext < 0.14.1, or Solaris gettext).
124 'make check' will also fail on systems where the C compiler does not
125 support ELF visibility attributes.
127 * The GMemChunk API has been deprecated in favour of a new 'slice
128 allocator'. See the g_slice documentation for more details.
130 * A new type, GInitiallyUnowned, has been introduced, which is
131 intended to serve as a common implementation of the 'floating reference'
132 concept that is e.g. used by GtkObject. Note that changing the
133 inheritance hierarchy of a type can cause problems for language
134 bindings and other code which needs to work closely with the type
135 system. Therefore, switching to GInitiallyUnowned should be done
136 carefully. g_object_compat_control() has been added to GLib 2.8.5
137 to help with the transition.
139 Notes about GLib 2.6.0
140 ======================
142 * GLib 2.6 introduces the concept of 'GLib filename encoding', which is the
143 on-disk encoding on Unix, but UTF-8 on Windows. All GLib functions
144 returning or accepting pathnames have been changed to expect
145 filenames in this encoding, and the common POSIX functions dealing
146 with pathnames have been wrapped. These wrappers are declared in the
147 header <glib/gstdio.h> which must be included explicitly; it is not
148 included through <glib.h>.
150 On current (NT-based) Windows versions, where the on-disk file names
151 are Unicode, these wrappers use the wide-character API in the C
152 library. Thus applications can handle file names containing any
153 Unicode characters through GLib's own API and its POSIX wrappers,
154 not just file names restricted to characters in the system codepage.
156 To keep binary compatibility with applications compiled against
157 older versions of GLib, the Windows DLL still provides entry points
158 with the old semantics using the old names, and applications
159 compiled against GLib 2.6 will actually use new names for the
160 functions. This is transparent to the programmer.
162 When compiling against GLib 2.6, applications intended to be
163 portable to Windows must take the UTF-8 file name encoding into
164 consideration, and use the gstdio wrappers to access files whose
165 names have been constructed from strings returned from GLib.
167 * Likewise, g_get_user_name() and g_get_real_name() have been changed
168 to return UTF-8 on Windows, while keeping the old semantics for
169 applications compiled against older versions of GLib.
171 * The GLib uses an '_' prefix to indicate private symbols that
172 must not be used by applications. On some platforms, symbols beginning
173 with prefixes such as _g will be exported from the library, on others not.
174 In no case can applications use these private symbols. In addition to that,
175 GLib+ 2.6 makes several symbols private which were not in any installed
176 header files and were never intended to be exported.
178 * To reduce code size and improve efficiency, GLib, when compiled
179 with the GNU toolchain, has separate internal and external entry
180 points for exported functions. The internal names, which begin with
181 IA__, may be seen when debugging a GLib program.
183 * On Windows, GLib no longer opens a console window when printing
184 warning messages if stdout or stderr are invalid, as they are in
185 "Windows subsystem" (GUI) applications. Simply redirect stdout or
186 stderr if you need to see them.
188 * The child watch functionality tends to reveal a bug in many
189 thread implementations (in particular the older LinuxThreads
190 implementation on Linux) where it's not possible to call waitpid()
191 for a child created in a different thread. For this reason, for
192 maximum portability, you should structure your code to fork all
193 child processes that you want to wait for from the main thread.
195 * A problem was recently discovered with g_signal_connect_object();
196 it doesn't actually disconnect the signal handler once the object being
197 connected to dies, just disables it. See the API docs for the function
198 for further details and the correct workaround that will continue to
199 work with future versions of GLib.
204 Bugs should be reported to the GNOME bug tracking system.
205 (http://bugzilla.gnome.org, product glib.) You will need
206 to create an account for yourself.
208 In the bug report please include:
210 * Information about your system. For instance:
212 - What operating system and version
213 - For Linux, what version of the C library
215 And anything else you think is relevant.
217 * How to reproduce the bug.
219 If you can reproduce it with one of the test programs that are built
220 in the tests/ subdirectory, that will be most convenient. Otherwise,
221 please include a short test program that exhibits the behavior.
222 As a last resort, you can also provide a pointer to a larger piece
223 of software that can be downloaded.
225 * If the bug was a crash, the exact text that was printed out
226 when the crash occured.
228 * Further information such as stack traces may be useful, but
234 Patches should also be submitted to bugzilla.gnome.org. If the
235 patch fixes an existing bug, add the patch as an attachment
238 Otherwise, enter a new bug report that describes the patch,
239 and attach the patch to that bug report.
241 Patches should be in unified diff form. (The -up option to GNUdiff.)