Q45228: Tzset Sample Program Redefinition Errors in Large Model

Article: Q45228
Product(s): See article
Version(s): 5.10   | 5.10
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | S_QuickC docerr | mspl13_c
Last Modified: 25-JUL-1989

The TZSET sample program given on Page 619 of the "Microsoft C 5.1
Run-time Library Reference" may yield the following errors:

   error C2086: 'daylight' : redefinition
   error C2086: 'timezone' : redefinition
   error C2086: 'tzname'   : redefinition

These errors occur only when compiling for the large or compact-memory
models.

The errors occur because under the large and compact-memory models,
the variable references default to far addresses, which contradicts
the external near declarations contained within the include file
TIME.H.

You may correct this problem by declaring the three variables in
your source as follows:

   int    near daylight;
   long   near timezone;
   char * near tzname[];

The include file, TIME.H, declares the variables as follows:

   extern int     near    cdecl daylight;
   extern long    near    cdecl timezone;
   extern char *  near    cdecl tzname[2];

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