ftty ("force teletypewriter") forces programs to think that standard output is a tty (interactive terminal):
$ ghc main.hs | less -R # no colors!
$ ftty ghc main.hs | less -R # colors are preserved$ make
# make install
This installs ftty to /usr/local/bin and libftty.so to
/usr/local/lib. To change the locations, edit the Makefile.
Note: if you change /usr/local/lib, you need to update the path in
the ftty shell script.