On Fri, Mar 02, 2007 at 06:56:12PM -0500, Bill Rugolsky Jr. wrote: > Thanks, Jakub -- I was a bit concerned when I couldn't rebuild Rawhide > tzdata, even on FC6, due to the 64-bit changes. Those are fully backwards compatible - zic just now adds 2 new sections to the file after the standard 32-bit header+tables, a 64-bit header+tables and an POSIX TZ env string for the last rule if any. All older readers don't care about whether the file ends at the end of the 32-bit tables or not, the header contains all needed sizes. And newer readers are able to use 64-bit tables or POSIX TZ env string if available, but can read just the 32-bit tables if that's all that is present. Jakub
