Notes on setting up Turbo C/C++ within DosBox 0.74, compiled from source:
Install DosBox from source
This is the dosbox_shared directory containing Turbo C/C++
This config file is tested and works, modify the last three commands, to set the correct path to where you’ve extracted the dosbox_shared.tar.bz2
Place the config file in /home/username/.dosbox/dosbox-0.74.conf