Re: A cheap performance optimization

[Matthias Clasen <mclasen redhat com>]

On Sat, 2005-01-08 at 00:12 +0800, James Henstridge wrote:
> Matthias Clasen wrote:
> 
> >One of the compiler people here at RedHat complained to me that most of
> >Gnome is linked with --export-dynamic, which really bloats both the size
> >and the load times (although prelink may alleviate that a bit). The ld
> >documentation contains exact details about when --export-dynamic is
> >needed, but it is never needed for libraries, and in most cases, it is
> >not needed for apps either. 
> >  
> >
> It is also worth noting that --export-dynamic breaks libtool's 
> -export-symbols and -export-symbols-regex options, causing all symbols 
> in a library to be exported.
> 
> >Currently, most of Gnome gets --export-dynamic from gmodule-2.0.pc,
> >which is required by many libraries. Fortunately, with GLib 2.6, fixing
> >this is as easy as requiring gmodule-no-export-2.0.pc instead of
> >gmodule-2.0.pc. For completeness, I just added gmodule-export-2.0.pc as
> >well.
> >
> >It would be a nice goal for Gnome 2.10 to replace all uses of
> >gmodule-2.0.pc by either gmodule-no-export-2.0.pc or gmodule-
> >export-2.0.pc (I guess the latter will be rarely needed).
> >  
> >
> I'm not sure how much use the gmodule-no-export-2.0.pc file will be for 
> applications using GTK, since gmodule-2.0 is a dependency of gtk+-2.0.pc 
> (so "pkg-config --libs gtk+-2.0" includes --export-dynamic).
> 

gtk 2.6 and pango 1.8 use gmodule-no-export-2.0.pc

Matthias