[cairo] Problems with GTK+ CAIRO and POPPLER mingw build

[Christoph Derigo]

Hello !
I do a program in gtk+ and cairo (mostly goocanvas) which should work on 
win32.
What i have done so far was useing stable cairo and gtk and goocanvas 
together, this works quite well for my stuff.( some rendering bugs on 
win32 with text had occured )
Now i have to do some pdf stuff, with printing and poppler came to my mind.
I found out that poppler in the git version does quite a good job, i 
updated my cairo to git for it to compile.
What I did was compiled the complete gtk+ stack from git now ( i know 
gtk3 is not finished but i gave it a try just to make sure bugs are not 
fixed already )
and after seeing the problems still remain i went back to the gtk stable 
stack also seeing the same problems.
Next i did try use the precompiled gtk+ bundle from this side:
http://ftp.gnome.org/pub/GNOME/binaries/win32/gtk+/2.20/gtk+-bundle_2.20.1-20100817_win32.zip
=> this seems to work. but if i replace the precompiled cairo in her 
with the git version the same problems occur here to.

for all my tries i linked against libpng14 ( from git )

to reproduce my problems:
0. have a msys mingw install with updated packages ( gcc 4.5 )
1. use the bundle from ftp.gnome.org
2. compile libpng14 from git
3. use libpng14 to link with cairo git or any other cairo version
4. compile poppler git ( not needed for the bug repro )

Here the results of my tries:
============================================================================================
cairo git and poppler git work well, display and printing works!
cairo git and gtk+ does NOT work. some icons disappear when mouse over 
and so on
cairo git and goocanvas works perfectly.
============================================================================================
cairo unstable version 1.9.6 and poppler work well, display and printing 
works!
cairo unstable version 1.9.6 and gtk+ WORK.
cairo unstable version 1.9.6 and goocanvas do not work correctly ( 
offsets are wrong, png loading does not work ).
============================================================================================

somehow each version newer than cairo 1.9.6 seems to mess with gtk+ (on 
win32, i did not test on other systems), but i saw many source changes
between 1.9.6 and 1.9.8 so someone can help me out explaining what i can 
do about this,
as the new git version of cairo seems to do a good job exept for the 
actual gtk+.