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--- cnv/rletogray.c.orig 1992-04-30 22:59:30.000000000 +0900 +++ cnv/rletogray.c 2012-10-15 22:37:09.000000000 +0900 @@ -30,6 +30,7 @@ */ #include <stdio.h> +#include <string.h> #include "rle.h" typedef FILE *FILPTR; @@ -41,7 +42,7 @@ * infile File to split. If none, uses stdin. */ -void +int main(argc, argv) int argc; char *argv[];