I was using cairo-1.0.2, but I also see in CVS. Please use test with a single equal sign instead of == in the tests at the bottom of configure.in, or the warning messages are never displayed.
this was fixed in bug 4823 *** This bug has been marked as a duplicate of 4823 ***
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.