ubuntu-14-dat.md

• C-dat - xfel-dat

Ubuntu 14 is very old (GCC 4.8 by default), and newer GCC versions may be more tolerant. Consider:

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt update
sudo apt install gcc-7 g++-7
export CC=gcc-7
make clean && make

ref

• ubuntu-dat