--- gctp/src/gctp.c.orig 2013-07-23 03:28:51.000000000 +0900 +++ gctp/src/gctp.c 2020-11-22 10:57:55.000000000 +0900 @@ -33,6 +33,12 @@ #include "cproj.h" #include "proj.h" +extern int for_init( int, int, double*, int, char *, char *, int *, int (*for_trans[])(double, double, double *, double *)); +extern void close_file(void); +extern int init(long, long, char *, char *); +extern long untfz(long, long, double *); +extern inv_init(int, int, double *, int, char *, char *, int *, int (*inv_trans[])(double, double, double*, double*)); + #define TRUE 1 #define FALSE 0