Plan 9 from Bell Labs’s /usr/web/sources/contrib/fgb/root/sys/src/ape/lib/freetype/docs/MAKEPP
As a special exception, FreeType can also be built with the 'makepp' build tool, available from http://makepp.sourceforge.net. Note, however. that you will need at least version 1.19 and pass the option --norc-substitution to have it work correctly.