PK69517: INCLUSION OF <STRING.H> BY THE DB2 PRECOMPILER FOR THE C HOST LANGUAGE MAY CAUSE C COMPILER ERRORS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The following C program receives a C compiler error after it is
  precompiled with the DB2 Precompiler because the precompiler
  inserts the #include <string.h> directive after the #pragma
  nosequence directive, and the <string.h> file already contains a
  typedef for size_t:
  
  #pragma nosequence
  typedef unsigned int size_t;
    ...
  
  Error received:
  EDC0289     30      The typedef name size_t cannot be redefined.
  

Local fix

• Change to a conditional typedef as follows:
  
  #ifndef __size_t
    typedef unsigned int size_t;
    #define __size_t 1
  #endif
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of the DB2 V9.1 for z/OS Precompiler   *
  *                 for the C host language.                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Inclusion of <string.h> by the DB2 V9.1 *
  *                      for z/OS Precompiler may result in C    *
  *                      compile errors.                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The DB2 V9.1 Precompiler includes the <string.h> header file in
  the generated C source program at the beginning, after any
  #pragma or #includes of the application, and before all other
  C source code.  If the application program contains an
  unconditional typedef for a type already defined by <string.h>,
  then a compile error will occur.
  
  For example, the following C program receives a compile error
  after it is precompiled:
  
  #pragma nosequence
  typedef unsigned int size_t;
  EXEC SQL INCLUDE SQLCA;
  extern main()
  {
  EXEC SQL COMMIT;
  }
  
  Compile error:
  CCN3334 Identifier size_t has already been defined
    or
  EDC0289 The typedef name size_t cannot be redefined.
  
  The cause of the compile error is that size_t is already
  defined in <string.h>.
  
  Additional keywords:  MSGCCN3334  MSGEDC0289
  

Problem conclusion

• The DB2 Precompiler is modified so that the inclusion of
  <string.h> into the generated C source program is removed, thus
  preventing the C compile error described above.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UK38545

Modules/Macros

• DSNHSTMD
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• R910 PSY UK38545

     UP08/08/15 P F808

Fix is available

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