It starts the virtual X (Xvfb) and launch an IceCat instance in order to
generate the profiling data for the compiler. It seems that Xvfb is
running fine (I can see the page http://localhost:8888/), but
compilation stops at this point. Last IceCat releases are built fine.
It seems that 404 is not important. I tried to build with GCC 4.7 and
4.6. Nothing changed. Tried many variations in the build process and
several machines (i686 and x86_64), but I haven't more ideas. Has anyone
been able to build IceCat with PGO?