On OS X 10.8, mapnik master built against latest cairo release (1.12.14) the ./tests/cpp_tests/map_request_test-bin test hangs and never exists.
Activity monitor shows the problem is a deadlock in cairo.
@springmeyer - cairo-1.12.14 works for me, how do you compile mapnik?
hmm.. in Release mode I get 10gb of allocations when running visual tests. Alloc from std::string and _cairo_ft_scaled_glyph ! update - this is unrelated, and triggered by TIFF=no JPEG=no configuration.