Cproto generates function prototypes and variable declarations from
C source code. Cproto can also convert function definitions between the
old style and the ANSI C style. This conversion will overwrite the
original files, however, so be sure to make a backup copy of your original
files in case something goes wrong. Since cproto uses a Yacc generated
parser, it shouldn't be confused by complex function definitions as much
as other prototype generators) because it uses a Yacc generated parser.

Cproto will be useful for C programmers, so install cproto if you are going
to do any C programming.