New header containing GTK_DEBUG-style debugging support for GLib.

* glib/gdebug.h: New header containing GTK_DEBUG-style debugging
	support for GLib. Currently only the fatal_warnings debug option exists.

	* glib/gmessages.c (g_log_msg_prefix_init): New one-shot function
	for parsing G_MESSAGES_PREFIXED.
	(_g_debug_init): New one-shot function for parsing G_DEBUG.
	(g_log_write_prefix): Use g_log_msg_prefix_init().
	(g_messages_init): Use g_log_msg_prefix_init() and _g_debug_init().

	* glib/Makefile.am (libglib_1_3_la_SOURCES): Add gdebug.h.


	* glib/Makefile.am (IGNORE_HFILES): Add gdebug.h.

	* glib/running.sgml: Document the G_DEBUG environment variable.

	* glib/tmpl/threads.sgml: Replace g_thread_wait() by
	g_thread_join() in two places.

docs/reference/glib/Makefile.am

@@ -34,7 +34,8 @@ IGNORE_HFILES=			\
 	gunicomp.h		\
 	gunidecomp.h		\
 	gunichartables.h	\
-	glibconfig-sysdefs.h
+	glibconfig-sysdefs.h	\
+	gdebug.h
 
 # Extra files to add when scanning
 EXTRA_HFILES=

docs/reference/glib/running.sgml

@@ -38,7 +38,27 @@ variables like <envar>LANG</envar>, <envar>PATH</envar> or <envar>HOME</envar>.
   <para>
     A list of log levels for which messages should be prefixed by the 
     program name and PID of the application. The default is to prefix
-    everything except %G_LOG_LEVEL_MESSAGE and %G_LOG_LEVEL_INFO. 
+    everything except <literal>G_LOG_LEVEL_MESSAGE</literal> and <literal>G_LOG_LEVEL_INFO</literal>. 
+  </para>
+</formalpara>
+
+<formalpara>
+  <title><envar>G_DEBUG</envar></title>
+
+  <para>
+    If GLib has been configured with <option>--enable-debug=yes</option>,
+    this variable can be set to a list of debug options, which cause GLib
+    to print out different types of debugging information.
+    <variablelist>
+      <varlistentry>
+        <term>fatal_warnings</term>
+        <listitem><para>Causes GLib to abort the program at the first call
+           to <link linkend="g-warning">g_warning</link>(). This option is 
+           special in that it doesn't require GLib to be configured with 
+           debugging support.</para>
+        </listitem>
+      </varlistentry>
+    </variablelist>
   </para>
 </formalpara>
 
@@ -61,9 +81,9 @@ static volatile gulong g_trap_free_size;
 static volatile gulong g_trap_realloc_size;
 static volatile gulong g_trap_malloc_size;
 </programlisting>
-If set to a size > 0, <link linkend="g-free">g_free()</link>, 
-<link linkend="g-realloc">g_realloc()</link> and 
-<link linkend="g-malloc">g_malloc()</link> will be intercepted if the size 
+If set to a size > 0, <link linkend="g-free">g_free</link>(), 
+<link linkend="g-realloc">g_realloc</link>() and 
+<link linkend="g-malloc">g_malloc</link>() will be intercepted if the size 
 matches the size of the corresponding memory block. This will only work with 
 <literal>g_mem_set_vtable (glib_mem_profiler_table)</literal> upon startup 
 though, because memory profiling is required to match on the memory block sizes.

docs/reference/glib/tmpl/threads.sgml

@@ -274,7 +274,7 @@ This function creates a new thread with the priority @priority.
 
 <para>
 If @joinable is %TRUE, you can wait for this threads termination
-calling g_thread_wait(). Otherwise the thread will just disappear, when
+calling g_thread_join(). Otherwise the thread will just disappear, when
 ready. 
 </para>
 
@@ -304,7 +304,7 @@ platform, if @stack_size is 0.
 
 <para>
 If @joinable is %TRUE, you can wait for this threads termination
-calling g_thread_wait(). Otherwise the thread will just disappear, when
+calling g_thread_join(). Otherwise the thread will just disappear, when
 ready. If @bound is %TRUE, this thread will be scheduled in the system
 scope, otherwise the implementation is free to do scheduling in the
 process scope. The first variant is more expensive resource-wise, but