[Bug target/28084] /usr/include/errno.h:28: error: previous declaration of 'int errno' with 'C++' linkage

["dave at hiauly1 dot hia dot nrc dot ca" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #1 from dave at hiauly1 dot hia dot nrc dot ca  2006-06-19 17:07 -------
Subject: Re:   New: /usr/include/errno.h:28: error: previous declaration of
'int errno' with 'C++' linkage

> /usr/include/errno.h:28: error: previous declaration of 'int errno' with 'C++'
> linkage
> /usr/include/sys/errno.h:48: error: conflicts with new declaration with 'C'
> linkage

It appears to me that HP intentionally declares 'errno' with both
'C' and 'C++' linkage.  This is what I see in sys/errno.h:

#  ifdef __cplusplus
     extern "C" {
#  endif /* __cplusplus */

#  if defined(_REENTRANT) && !defined(_PTHREADS_DRAFT4)
     /* Get errno definition by including <errno.h> not <sys/errno.h> */
#  else  /* ! _REENTRANT || _PTHREADS_DRAFT4 */
     extern int errno;
#  endif /* ! _REENTRANT || _PTHREADS_DRAFT4 */

#  ifdef __cplusplus
     }
#  endif /* __cplusplus */

Dave


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28084