Many countries around the world have been incrementally implementing legislation to change their Daylight Saving Time (DST) dates and their time zone definitions.

As these changes come into force in each country, it may impact your C++ code if you are currently using the Sun C++ date and time calculation classes: RWDate, RWTime, RWZoneSimple. These classes are included in the Rogue Wave Tools.h++ library.

This issue can occur in the following releases:

SPARC Platform

• Forte Developer 6 (U2) without patch 111685-24
• Forte Developer 7 without patch 111715-18
• Sun Studio 8 without patch 113817-19
• Sun Studio 9 without patch 117549-07
• Sun Studio 10 without patch 117830-09
• Sun Studio 11 without patch 121017-07

x86 Platform

• Forte Developer 6 (U2) without patch 111686-24
• Sun Sun Studio 8 without patch 113819-19
• Sun Studio 9 without patch 117550-07
• Sun Studio 10 without patch 117831-09
• Sun Studio 11 without patch 121018-07

Notes:

1. There is no release of Forte Developer 7 for the x86 Platform.
2. Earlier compiler releases that may be affected (which are EOL, EOSL or unsupported) will not be evaluated regarding the potential impact of this issue.

Unless the DST rules are updated, date and time calculations may return incorrect results since times will be stored and manipulated based on the dates for DST start and end that were valid prior to the rule change.

There is no workaround for this issue. Please see the Resolution section below.

This issue is addressed in the following releases:

SPARC Platform

• Forte Developer 6 (U2) with patch 111685-24 or later
• Forte Developer 7 with patch 111715-18 or later
• Sun Sun Studio 8 with patch 113817-19 or later
• Sun Studio 9 with patch 117549-07 or later
• Sun Studio 10 with patch 117830-09 or later
• Sun Studio 11 with patch 121017-07 or later

x86 Platform

• Sun Studio 6 (FDu2) with patch 111686-24 or later
• Sun Sun Studio 8 with patch 113819-19 or later
• Sun Studio 9 with patch 117550-07 or later
• Sun Studio 10 with patch 117831-09 or later
• Sun Studio 11 with patch 121018-07 or later

To get the updates, you will need to download the current Sun C++ compiler patch which includes the fix for the Rogue Wave Tools.h++ library that comes with the compiler.

Additional Installation Notes:

1. If an application does not use RW Tools.h++ and links to the shared (.so) version of Solaris system libraries, halt the application, apply the appropriate Solaris patches, and restart the application. The application will then have the correct DST adjustments.

2. If an application uses the shared version of librwtool, apply the Sun C++ compiler patch, then update all installations of the application with the new version of librwtool.so.2. Also apply the appropriate Solaris patch to all systems.

3. If an application links the static librwtool.a, apply the Sun C++ compiler patch, re-link the application, and update all installations of the application. Also apply the appropriate Solaris patch to all systems.

Notes:

For more detailed information regarding DST, please see:

General DST Information:

http://www.sun.com/dst

Developer Tools Information and DST Matrix:

http://www.sun.com/bigadmin/hubs/dst/software/#Developer_Products

Solaris DST Information:

http://www.sun.com/bigadmin/hubs/dst/software/#Solaris

• Updated Impact section

15-Feb-2007:

• Updated Impact section

• Updated Impact, Symptoms, and Resolution sections

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