Buildscript:

In file included from filter/cairogradient/cairogradient.c:30:
../include/frei0r_cairo.h: In function 'frei0r_cairo_set_operator':
../include/frei0r_cairo.h:78: error: 'CAIRO_OPERATOR_MULTIPLY' undeclared (first use in this function)
-snip-
../include/frei0r_cairo.h:130: error: 'CAIRO_OPERATOR_HSL_COLOR' undeclared (first use in this function)
../include/frei0r_cairo.h:134: error: 'CAIRO_OPERATOR_HSL_LUMINOSITY' undeclared (first use in this function)
make[1]: *** [cairogradient_la-cairogradient.lo] Error 1
make[1]: *** Waiting for unfinished jobs....
mv -f .deps/vignette.Tpo .deps/vignette.Plo
mv -f .deps/xfade0r.Tpo .deps/xfade0r.Plo
make[1]: Leaving directory `/home/zeus/KDENLIVE-0.9.6/src/frei0r/src'
make: *** [all-recursive] Error 1
ERROR: Unable to build frei0r
LOG: Process has finished. Reason: FAILURE Some kind of error occured: Unable to build frei0r

I have libcairo2. Iam on Lucid Lynx. Everything too Old?

Just tested the build script and it works here. When you say you have libcairo2, to clarify that is the libcairo2-dev source code?

I have the libcairo2-dev packet also installed. No other.