Re: glib.h

[Matthias Clasen <mclasen redhat com>]

Am Mittwoch, den 15.09.2004, 21:24 -0700 schrieb Kermit Tensmeyer:
> Heck, I've use glib, gtk, pango, atk to build other software. And I _know_ 
> that it compiles clean. At this point (after digging thru the include files)
> I'm not sure I know how it could compile at all.
> 
>  Big changes between the glib-1.2 and the glib-2.0 version and specificly 
> regarding glib.h. In three instances that I've found glib.h contains (and 
> only contains) includes of <glib/gxxxxx.h> form
>   and the gxxxx are in alpha order
> 
>  When I was building something (evolution, gtkhtml or something) the compile 
> failed. It failed because G_BEGIN_DECL had not been defined when first used
> by gtypes.h when included by galloca.h.
> 
>  and likewise for a few other things.  I rearranged glib.h so that 
> #include <glib/gmacro.h>
> #include <glib/gtypes.h>
> #include <glib/galloca.h>
>    were first
> 
>  and then I was stumped by another problem the typedef 'gsize' isn't defined 
> in glib. (it's used extensively but not defined -and- it was defined in 
> glib.h (version 1.2). The first and closest typedef of 'gsize' is in the gobj 
> include directory.
> 
>   so why does any of this compile? I would have thought the test cases would 
> have caught those compile type errors. 
>   (heck the only thing I can think of is that other includes had already 
> defined those typedefs from another set of library references. But I think 
> that glib should not be dependant on any other of the gnome libraries unless 
> it is so documented..)
> 

gsize (and other platform-dependent things) are defined in glibconfig.h,
which you'll find in $libdir/glib-2.0/include.

glibconfig.h gets included in glib.h via 

glib.h -> galloca.h -> gtypes.h -> glibconfig.h

You are using pkg-config to get the correct CFLAGS for building things
against glib, right ?

Matthias