Can Javet Support Legacy Linux?

Yes, Javet can support some legacy linux distributions, eg: Ubuntu 16.04, Ubuntu 18.04, but not with the official builds which rely on more advanced tool chain.

Please download the private builds from this drive and prepare your runtime environment as following.

sudo apt update
sudo apt upgrade -y
sudo apt install build-essential -y
sudo apt install software-properties-common -y
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt upgrade -y
sudo apt install gcc-snapshot -y
sudo apt upgrade -y
sudo apt install gcc-7 g++-7 gcc-8 g++-8 gcc-9 g++-9 -y
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 90 --slave /usr/bin/g++ g++ /usr/bin/g++-9 --slave /usr/bin/gcov gcov /usr/bin/gcov-9
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 80 --slave /usr/bin/g++ g++ /usr/bin/g++-8 --slave /usr/bin/gcov gcov /usr/bin/gcov-8
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 70 --slave /usr/bin/g++ g++ /usr/bin/g++-7 --slave /usr/bin/gcov gcov /usr/bin/gcov-7
sudo update-alternatives --config gcc

There are 3 choices for the alternative gcc (providing /usr/bin/gcc).

Selection    Path            Priority   Status
------------------------------------------------------------
* 0            /usr/bin/gcc-9   90        auto mode
  1            /usr/bin/gcc-7   70        manual mode
  2            /usr/bin/gcc-8   80        manual mode
  3            /usr/bin/gcc-9   90        manual mode

Caution

Private builds imply considerable additional effort, so there is no commitments. Please contact the maintainer for private builds wisely.