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Add defense against possibility that tzname[] doesn't exist.

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This commit is contained in:
Tom Lane 2003-05-22 17:13:08 +00:00
parent dbd55d3a5b
commit cef0652a3d
1 changed files with 14 additions and 1 deletions
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15
src/backend/commands/variable.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.76 2003/05/18 01:06:25 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.77 2003/05/22 17:13:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -29,6 +29,17 @@
#include "utils/tqual.h"
#include "mb/pg_wchar.h"
/*
* Some systems have tzname[] but don't declare it in <time.h>. Use this
* to duplicate the test in AC_STRUCT_TIMEZONE.
*/
#ifdef HAVE_TZNAME
#ifndef tzname /* For SGI. */
extern char *tzname[];
#endif
#endif
/*
* DATESTYLE
*/
@ -325,8 +336,10 @@ tzset_succeeded(const char *tz)
/*
* Check first set of heuristics to say that tzset definitely worked.
*/
#ifdef HAVE_TZNAME
if (tzname[1] && tzname[1][0] != '\0')
return true;
#endif
if (TIMEZONE_GLOBAL != 0)
return true;