Gtkmm-forge digest, Vol 1 #1036 - 1 msg

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Today's Topics:

   1. [Bug 327022] New: glibmm-2.8.3  fails to compile against glib-2.9.2 (glibmm (bugzilla.gnome.org))

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Message: 1
To: gtkmm-forge lists sourceforge net
From: "glibmm (bugzilla.gnome.org)" <bugzilla-daemon bugzilla gnome org>
Date: Sat, 14 Jan 2006 19:59:19 -0500 (EST)
Subject: [gtkmm bugzilla] [Bug 327022] New: glibmm-2.8.3  fails to compile against glib-2.9.2

Do not reply to this via email (we are currently unable to handle email
responses and they get discarded).  You can add comments to this bug at
http://bugzilla.gnome.org/show_bug.cgi?id=3D327022
 glibmm | build | Ver: 2.8.x

           Summary: glibmm-2.8.3  fails to compile against glib-2.9.2
           Product: glibmm
           Version: 2.8.x
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: Normal
         Component: build
        AssignedTo: gtkmm-forge lists sourceforge net
        ReportedBy: jsacco ydl net
         QAContact: gtkmm-forge lists sourceforge net
                CC: mclasen redhat com
     GNOME version: Unspecified
   GNOME milestone: Unspecified


glibmm fails to compile against glib-2.9.2=20

System: G4 PowerMac running YDL-4.0.1, an FC2 clone,, gcc-3.3.3,
garnome-2.13.4+

The problem file is=20

   ./glib/glibmm/thread.cc

thread.cc: In member function `void Glib::StaticMutex::lock()':
thread.cc:162: error: invalid conversion from `_GMutex**' to `void* volat=
ile*'
thread.cc: In member function `bool Glib::StaticMutex::trylock()':
thread.cc:167: error: invalid conversion from `_GMutex**' to `void* volat=
ile*'
thread.cc: In member function `void Glib::StaticMutex::unlock()':
thread.cc:172: error: invalid conversion from `_GMutex**' to `void* volat=
ile*'
thread.cc: In member function `Glib::StaticMutex::operator Glib::Mutex&()=
':
thread.cc:194: error: invalid conversion from `_GMutex**' to `void* volat=
ile*'
thread.cc: In constructor `Glib::RecMutex::RecMutex()':
thread.cc:269: error: invalid conversion from `_GMutex**' to `void* volat=
ile*'
thread.cc: In constructor `Glib::RWLock::RWLock()':
thread.cc:326: error: invalid conversion from `_GMutex**' to `void* volat=
ile*'

The source of the problem can be traced to a change in the glib macros. W=
hether
or not this is a glibmm bug or a glib bug is unknown [to me] at this poin=
t.
Hopefully this issue can be brought to closure.

I worked around this problem by modifying

   include/glib-2.0/glib/gthread.h

Specifically,

--- gthread.h   2006-01-14 19:24:21.000000000 -0500
+++ gthread.h.new       2006-01-14 18:57:40.000000000 -0500
@@ -138,7 +138,7 @@
 GMutex* g_static_mutex_get_mutex_impl   (GMutex **mutex);

 #define g_static_mutex_get_mutex_impl_shortcut(mutex) \
-  (g_atomic_pointer_get (mutex) ? *(mutex) : \
+  (g_atomic_pointer_get ((gpointer*)mutex) ? *(mutex) : \
    g_static_mutex_get_mutex_impl (mutex))

The cast in g_atomic_pointer_get()

   (gpointer*)mutex

existed in previous versions of glib and was removed recently

     http://cvs.gnome.org/viewcvs/glib/glib/gthread.h?r1=3D1.24&r2=3D1.25

If this change was intentional to enforce stricter API compliance, then t=
he
probem is with the glibmm code, for example,

   void StaticMutex::lock()
   {=20
     g_static_mutex_lock(&gobject_);
   }


Thoughts???

-Joseph


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