On Fri, 09 Nov 2007 07:19:22 -0800 Alan M. Evans wrote: > On Fri, 2007-11-09 at 00:04 +0100, Rafał Mużyło wrote: > > It's not quite gtk related, but do any of you know how to fix a > > problem with G_LOCK/G_UNLOCK producing strict aliasing warnings > > with -O2 ? I'm looking for a real solution, not something to > > silence warnings, like -fno-strict-aliasing ? It seems that there > > was once a similar problem (bug 316221) but bugzilla seems to be > > either down or otherwise unaccessible, so I can't compare with my > > problem. > > I presume you're system is x86_64? I asked the same question in July: > > http://mail.gnome.org/archives/gtk-app-devel-list/2007-July/msg00038.html > > The executive summary for the thread is that it's an incorrect cast in > GLib that only affects x86_64 with optimizations turned on. Likely > you'll have to live with or disable the warnings until 64-bit systems > become common enough that this bites someone with the wherewithall to > track down the proper source of the problem in GLib.
More to the point, if you wanted to track down the problem in glib, it looks like the answer is here: http://mail.gnome.org/archives/gtk-app-devel-list/2007-July/msg00069.html ... though it might require some digging to figure out where to fix it, as glibconfig.h is autogenerated per-platform. However, need to be careful: http://mail.gnome.org/archives/gtk-app-devel-list/2007-July/msg00060.html But, this: http://groups.google.com/group/comp.lang.c/msg/42f0898e5500d015?hl=en seems to indicate that it's ok to do the extra cast: "Equivalently, you can write: ((int *)p[i])[j] which uses the fact that a cast has the same effect as an assignment to a temporary variable." At any rate, I'm pretty sure all platforms that glib supports have the same size pointers for all kinds of pointers, so it's probably moot. -brian _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
