Building modified OpenJDK with IcedTea?

[Peter Libic]

Hi,

I am doing some performance measurements of GCs in Java and I need to make
some instrumentation in the virtual machine to get required data.

I was thinking of using IcedTea for this - building working JVM from OpenJDK
is quite difficult for me.

So, I'd like to ask, if there's some simple way how the IcedTea could use my
modified copy of OpenJDK (without rebuilding from scratch at every build)?

Thanks,

Peter Libic