spaces in MiXiM makemakefiles
MiXiM uses a ‘makemakefiles’ script, which makes the Makefiles by means of the following command:
make -f makemakefiles
However, after some modifications (adding own stuff) it stopped making new Makefile files. From visual inspection, nothing is wrong with the file. However, there’s a subtle thing you may want to check: the TAB in front of each line. DO NOT make the mistake of adding a few spaces, this is not just there to prettify things, opp_makemake apparently delimits on this TAB and gets severely upset from spaces there.
Removing any spaces and adding a TAB fixes the problem.