Build JDK from source on Ubuntu 20.04

cd /home/iconplus/Download

wget -c https://releases.llvm.org/9.0.0/clang+llvm-9.0.0-x86_64-linux-gnu-ubuntu-18.04.tar.xz

tar -xvf clang+llvm-9.0.0-x86_64-linux-gnu-ubuntu-18.04.tar.xz

./configure --with-num-cores=4 --with-memory-size=4096 --with-toolchain-type=clang --with-toolchain-path=/home/iconplus/Downloads/clang+llvm-9.0.0-x86_64-linux-gnu-ubuntu-18.04/bin --with-libclang=/home/iconplus/Downloads/clang+llvm-9.0.0-x86_64-linux-gnu-ubuntu-18.04

make images