C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
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Global Variables
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─────Run-Time Library───────────────────────────────────────────────────────
 
   The following global variables are defined in run-time libraries:
 
  _amblksiz      errno        _osmode        _sys_errlist
  _cpumode      _fileinfo     _osversion     _sys_nerr
  _daylight     _fmode        _pgmptr        _timezone
  _doserrno     _osmajor      _psp           _tzname
  _environ      _osminor
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