The fpga-zynq repo (https://github.com/ucb-bar/fpga-zynq) has some git submodules. One of them is the Rocket-chip submodule, but that repo of Rocket-chip is out of date, so I tried compiling the rocket with the most recent repo. When I did that, I got a problem, as we can see in the following image:
[error] (run-main-0) java.lang.NoClassDefFoundError: firrtl/util/BackendCompilationUtilities$class
Image with the error situation.
Does someone have a solution for it?
follow these instructions:
sudo apt install default-jdk (if you are using ubuntu)
or
apt install openjdk-8-jre-headless
both worked for me
check what JDK version your system is running:
javac -version
if it is different then JDK 8 you should set it manually:
sudo update-alternatives --config java
There are 3 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode
2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode
Press <enter> to keep the current choice[*], or type selection number:
it worked for me. Good Luck