PH62540: __GRP NAME COLLISION BETWEEN GRP.H AND LOCALE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A compile-time error is seen when including header files <grp.h>
  and <locale>.
    === TEST CASE ===
  #include <grp.h>
  #include <locale>
  int main() { return 0; }
  
  $ ibm-clang++ t.C
  In file included from t.C:2:
  include/c++/v1/locale:2328:15: error: expected ')'
  2328 |       string& __grp,
       |               ^
  util/usr/include/grp.h:5:34: note: expanded from macro '__grp'
     5 |                    #define __grp 1
       |                                  ^
  include/c++/v1/locale:2322:28: note: to match this '('
  2322 |   static void __gather_info(
       |
  ...                            ^
  

Local fix

• Switch the order of the header files:
  
  #include <locale>
  #include <grp.h>
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: C++ users including system header, grp.h     *
  *                 before the locale system header. For         *
  *                 example:                                     *
  *                 #include <grp.h>                             *
  *                 #include                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Compiler issues the following error     *
  *                      due to __grp macro collision:           *
  *                      include/c++/v1/locale:2724:56: error:   *
  *                      expected ')'                            *
  *                      char_type& __ts, string& __grp,         *
  ****************************************************************
  * RECOMMENDATION: Apply the PTF                                *
  ****************************************************************
  Macro __grp in <grp.h> collides with template parameter name
  used in .
  

Problem conclusion

• System headers should be fixed to prevent name collision as
  reported.
  

Temporary fix

Comments

APAR Information

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

  PH62537

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

  UI97856

Modules/Macros

• CELQDEST CRTDHCXA CRTDHCXE CRTDHCXG CRTDHCXH CRTDHCXP CRTDHCXS
  CRTDHUNW CRTDNCXA CRTDNCXE CRTDNCXH CRTDNCXP CRTDNUNW CRTDOCXA
  CRTDQCXA CRTDQCXE CRTDQCXG CRTDQCXH CRTDQCXP CRTDQCXS CRTDQUNW
  CRTDQXLA CRTEHCXA CRTEHCXE CRTEHCXG CRTEHCXH CRTEHCXP CRTEHCXS
  CRTEHUNW CRTENCXA CRTENCXE CRTENCXH CRTENCXP CRTENUNW CRTEOCXA
  CRTEQCXA CRTEQCXE CRTEQCXG CRTEQCXH CRTEQCXP CRTEQCXS CRTEQUNW
  CRTEQXLA EDCHDEST
  

Fix information

• Fixed component name

  ANSI C++ CLASS

• Fixed component ID

  568819807

Applicable component levels

• R7D0 PSY UI97856

     UP24/09/20 P F409

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.