M16C/60, M16C/30, M16C/20, and M16C/10 series of MCUs

M3T-NC30WA V.1.00 Release 1 -- V.5.00 Release 2

79xx series of MCUs

M3T-NC79WA V.2.00 Release 1 -- V.4.10 Release 1A

77xx series of MCUs

M3T-NC77WA V.3.00 Release 1 -- V.5.20 Release 4

1. In M3T-NC30WA V.1.00 Release 1--V.2.20 Release 1, incorrect code may be generated. (And a warning message is displayed at linking.)
2. In M3T-NC30WA V.3.00 Release 1--V.5.00 Release 2, System Error may arise.
3. In M3T-NC79WA and M3T-NC77WA, incorrect code may be generated.

This problem may occur if the following five conditions are satisfied:

(1) A structure or union is defined.

(2) The data type of an array within the structure or union in (1) is defined using a typedef statement.

(3) A variable is declared to be of the type defined in (2).

(4) The near, far, or const qualifier is added to the declaration in (3). (The const qualifier is a condition required only by M3T-NC30WA.)

(5) The structure or union in (1) is referenced.

--------------------------------------------------------------------------
   struct tag {                          /* Condition (1) */
       long     l;
       char     c;
   };

   typedef      struct tag      ARR[3];  /* Condition (2) */
   far const ARR                dat      /* Conditions (3),and (4) */
        = { 1, 2, 3, 4, 5, 6 };

   void func(int i)
   {
        char c;

        c = dat[i].c + 1;                /* Condition (5) */
   }
--------------------------------------------------------------------------

Place a qualifier of the same type as used in (4) before the array in the typedef statement in (2).

[Example]
-------------------------------------------------------------------------
 struct tag {
     long     l;
     char     c;
 };

 typedef      struct tag far  ARR[3];  /* Place another far before ARR */
 far const    ARR             dat = { 1, 2, 3, 4, 5, 6 };

 void func(int i)
 {
      char c;

      c = dat[i].c + 1;
 }
-------------------------------------------------------------------------