phrep

See examples/make/ for a trivial Makefile.

• It preprocesses *.src → *.php files.

• Recursively scans subfolders for input .src files.

• Can predefine a main config.h include etc.

• Or just set default phrep options.

Though for most projects even a Makefile is overkill. Rather prefer small shell scripts if you want to preprocess files repeatedly / or just once in a while.