gnuCobol 'EOF' is not defined

Question

I have the following Gnu Cobol code:

   IDENTIFICATION DIVISION.
   PROGRAM-ID. INCOME-TAX-CALCULATOR.

   ENVIRONMENT DIVISION.
   INPUT-OUTPUT SECTION.
   FILE-CONTROL.
       SELECT EMPLOYEE-FILE
           ASSIGN TO "employees.csv"
           ORGANIZATION IS LINE SEQUENTIAL.

   DATA DIVISION.
   FILE SECTION.
   FD  EMPLOYEE-FILE.
   01  EMPLOYEE-RECORD.
       02  EMP-ID              PIC 9(5).
       02  EMP-NAME            PIC X(30).
       02  EMP-SALARY          PIC 9(7).
       02  EMP-TAX             PIC 9(5).

   WORKING-STORAGE SECTION.
   01  WS-TAX-RATE           PIC 9(4)V99 VALUE 20.

   PROCEDURE DIVISION.
   OPEN INPUT EMPLOYEE-FILE
   PERFORM UNTIL EOF
       READ EMPLOYEE-FILE
           AT END SET EOF TO TRUE
       END-READ
       COMPUTE EMP-TAX = EMP-SALARY * WS-TAX-RATE
       DISPLAY EMP-ID, EMP-NAME, EMP-SALARY, EMP-TAX
   END-PERFORM
   CLOSE EMPLOYEE-FILE
   STOP RUN.

in GnuCobol 3.1.2.0 I get the following error: programName:25: error: 'EOF' is not defined

I have seen similar questions but END PROGRAM does not help.

I use the compiler with the free format like this: cobc -x -F -o programName programName.cbl

Answer 1

You've missed a definition for that EOF, so it is... undefined.

adding a definition like the following in WORKING-STORAGE-SECTION would solve that:

   01  FILLER PIC X VALUE ' '.
       88  EOF VALUE 'E'.

but you'd likely define a "NOT-EOF" or similar and set it before that loop, or, even better get rid of it completely:

   PERFORM UNTIL EXIT
       READ EMPLOYEE-FILE
           AT END EXIT PERFORM
       END-READ
       COMPUTE EMP-TAX = EMP-SALARY * WS-TAX-RATE
       DISPLAY EMP-ID, EMP-NAME, EMP-SALARY, EMP-TAX
   END-PERFORM

... but you'd likely still want to add checks for "did the OPEN work", but that's a different question, if at all.