ERROR: invalid datatype 'FILE'

Hi

I am trying to migrate informix Esql/C application to PostgeSQL using ecpg.
I have a structure in the code, where one of the element data type is
non-primitive. When i try to complile the code it throws following error
message.

ERROR: invalid datatype 'FILE'

Program Code

#include <stdlib.h>
#include <stdio.h>

EXEC SQL BEGIN DECLARE SECTION;
struct  rid_ds
{
        double de_re_rid;
        double de_re_xrid;
        FILE   *fp;
} dbinfo_t;
dbinfo_t dbval;
EXEC SQL END DECLARE SECTION;

main()
{

                printf("Test Program :\n");

}


Below is the command i use to compile the code.

ecpg -c prog1.pgc

prog1.pgc:9: ERROR: invalid datatype 'FILE'

The same code compiles using esqlc without any problem. Is there any way to
fix about error

ECPG version:

ecpg (PostgreSQL 8.2.13) 4.2.1

RHEL 5 update 3

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