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/mailinglists.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 * It is now allowed to call g_thread_init(NULL) multiple times, and
31 to call glib functions before g_thread_init(NULL) is called
32 (although the later is mainly a change in docs as this worked before
33 too). See the GThread reference documentation for the details.
35 * GObject now links to GThread and threads are enabled automatically
36 when g_type_init() is called.
38 * GObject no longer allows to call g_object_set() on construct-only properties
39 while an object is being initialized. If this behavior is needed, setting a
40 custom constructor that just chains up will re-enable this functionality.
42 * GMappedFile on an empty file now returns NULL for the contents instead of
43 returning an empty string. The documentation specifically states that code
44 may not rely on nul-termination here so any breakage caused by this change
45 is a bug in application code.
50 * Repeated calls to g_simple_async_result_set_op_res_gpointer used
51 to leak the data. This has been fixed to always call the provided
57 * The functions for launching applications (e.g. g_app_info_launch() +
58 friends) now passes a FUSE file:// URI if possible (requires gvfs
59 with the FUSE daemon to be running and operational). With gvfs 2.26,
60 FUSE file:// URIs will be mapped back to gio URIs in the GFile
61 constructors. The intent of this change is to better integrate
62 POSIX-only applications, see bug #528670 for the rationale. The
63 only user-visible change is when an application needs to examine an
64 URI passed to it (e.g. as a positional parameter). Instead of
65 looking at the given URI, the application will now need to look at
66 the result of g_file_get_uri() after having constructed a GFile
67 object with the given URI.
72 * The recommended way of using GLib has always been to only include the
73 toplevel headers glib.h, glib-object.h and gio.h. GLib enforces this by
74 generating an error when individual headers are directly included.
75 To help with the transition, the enforcement is not turned on by
76 default for GLib headers (it is turned on for GObject and GIO).
77 To turn it on, define the preprocessor symbol G_DISABLE_SINGLE_INCLUDES.
82 * GLib now includes GIO, which adds optional dependencies against libattr
83 and libselinux for extended attribute and SELinux support. Use
84 --disable-xattr and --disable-selinux to build without these.
89 * The functions g_snprintf() and g_vsnprintf() have been removed from
90 the gprintf.h header, since they are already declared in glib.h. This
91 doesn't break documented use of gprintf.h, but people have been known
92 to include gprintf.h without including glib.h.
94 * The Unicode support has been updated to Unicode 4.1. This adds several
95 new members to the GUnicodeBreakType enumeration.
97 * The support for Solaris threads has been retired. Solaris has provided
98 POSIX threads for long enough now to have them available on every
101 * 'make check' has been changed to validate translations by calling
102 msgfmt with the -c option. As a result, it may fail on systems with
103 older gettext implementations (GNU gettext < 0.14.1, or Solaris gettext).
104 'make check' will also fail on systems where the C compiler does not
105 support ELF visibility attributes.
107 * The GMemChunk API has been deprecated in favour of a new 'slice
108 allocator'. See the g_slice documentation for more details.
110 * A new type, GInitiallyUnowned, has been introduced, which is
111 intended to serve as a common implementation of the 'floating reference'
112 concept that is e.g. used by GtkObject. Note that changing the
113 inheritance hierarchy of a type can cause problems for language
114 bindings and other code which needs to work closely with the type
115 system. Therefore, switching to GInitiallyUnowned should be done
116 carefully. g_object_compat_control() has been added to GLib 2.8.5
117 to help with the transition.
119 Notes about GLib 2.6.0
120 ======================
122 * GLib 2.6 introduces the concept of 'GLib filename encoding', which is the
123 on-disk encoding on Unix, but UTF-8 on Windows. All GLib functions
124 returning or accepting pathnames have been changed to expect
125 filenames in this encoding, and the common POSIX functions dealing
126 with pathnames have been wrapped. These wrappers are declared in the
127 header <glib/gstdio.h> which must be included explicitly; it is not
128 included through <glib.h>.
130 On current (NT-based) Windows versions, where the on-disk file names
131 are Unicode, these wrappers use the wide-character API in the C
132 library. Thus applications can handle file names containing any
133 Unicode characters through GLib's own API and its POSIX wrappers,
134 not just file names restricted to characters in the system codepage.
136 To keep binary compatibility with applications compiled against
137 older versions of GLib, the Windows DLL still provides entry points
138 with the old semantics using the old names, and applications
139 compiled against GLib 2.6 will actually use new names for the
140 functions. This is transparent to the programmer.
142 When compiling against GLib 2.6, applications intended to be
143 portable to Windows must take the UTF-8 file name encoding into
144 consideration, and use the gstdio wrappers to access files whose
145 names have been constructed from strings returned from GLib.
147 * Likewise, g_get_user_name() and g_get_real_name() have been changed
148 to return UTF-8 on Windows, while keeping the old semantics for
149 applications compiled against older versions of GLib.
151 * The GLib uses an '_' prefix to indicate private symbols that
152 must not be used by applications. On some platforms, symbols beginning
153 with prefixes such as _g will be exported from the library, on others not.
154 In no case can applications use these private symbols. In addition to that,
155 GLib+ 2.6 makes several symbols private which were not in any installed
156 header files and were never intended to be exported.
158 * To reduce code size and improve efficiency, GLib, when compiled
159 with the GNU toolchain, has separate internal and external entry
160 points for exported functions. The internal names, which begin with
161 IA__, may be seen when debugging a GLib program.
163 * On Windows, GLib no longer opens a console window when printing
164 warning messages if stdout or stderr are invalid, as they are in
165 "Windows subsystem" (GUI) applications. Simply redirect stdout or
166 stderr if you need to see them.
168 * The child watch functionality tends to reveal a bug in many
169 thread implementations (in particular the older LinuxThreads
170 implementation on Linux) where it's not possible to call waitpid()
171 for a child created in a different thread. For this reason, for
172 maximum portability, you should structure your code to fork all
173 child processes that you want to wait for from the main thread.
175 * A problem was recently discovered with g_signal_connect_object();
176 it doesn't actually disconnect the signal handler once the object being
177 connected to dies, just disables it. See the API docs for the function
178 for further details and the correct workaround that will continue to
179 work with future versions of GLib.
184 Bugs should be reported to the GNOME bug tracking system.
185 (http://bugzilla.gnome.org, product glib.) You will need
186 to create an account for yourself.
188 In the bug report please include:
190 * Information about your system. For instance:
192 - What operating system and version
193 - For Linux, what version of the C library
195 And anything else you think is relevant.
197 * How to reproduce the bug.
199 If you can reproduce it with one of the test programs that are built
200 in the tests/ subdirectory, that will be most convenient. Otherwise,
201 please include a short test program that exhibits the behavior.
202 As a last resort, you can also provide a pointer to a larger piece
203 of software that can be downloaded.
205 * If the bug was a crash, the exact text that was printed out
206 when the crash occured.
208 * Further information such as stack traces may be useful, but
214 Patches should also be submitted to bugzilla.gnome.org. If the
215 patch fixes an existing bug, add the patch as an attachment
218 Otherwise, enter a new bug report that describes the patch,
219 and attach the patch to that bug report.
221 Patches should be in unified diff form. (The -up option to GNUdiff.)