[OT] How to add cairo linking and compilation flags to makefile ?

[Colossus <colossus 3000 it>]

Hi,

sorry for the OT. I upgraded to gtk 2.8 and cairo and obviously my 
glade makefile project doesn't contain -I/usr/include/cairo. I added
manually to it in my_project/Makefile and my_project/src/Makefile but
it doesn't work, I keep getting cairo.h file not found in the output
of makefile:

1) How can I fix this ?
2) How can I have -I/usr/include/cairo automatically added in 
makefile, when I issue automake to add new .c and .h files in Makefile ?

Thanks for the help and again sorry for being OT
--
Colossus

Cpsed, a Linux OpenGL 3D scene editor
http://cpsed.sourceforge.net/