Ucpp is a C preprocessor; it is designed to be quick and light, but fully compliant with the ISO standard 9899:1999, also known as C99. Ucpp can be compiled as a stand-alone program, or linked to some other code; in the latter case, ucpp will output tokens, one at a time, on demand, as an integrated lexer.WWW: https://github.com/lpsantil/ucpp