I tried to compile SU2 with:
git clone https://github.com/su2code/SU2
cd SU2
./configure
make -j$(nproc)
Configure ran without any issues, but make failed because it was looking for automake-1.14 and aclocal-1.14. On my system I have version 1.11 installed. So I created two symlinks:
sudo ln -s /usr/bin/automake /usr/local/bin/automake-1.14
sudo ln -s /usr/bin/aclocal /usr/local/bin/aclocal-1.14
Ran make again, et voila, everything worked out fine. No issues.
I would like to suggest to change the source of SU2 to not specifically require version 1.14 of automake and aclocal.