I've made a makefile that can build the library functions (64-bit time_t only, and haven't done anything yet about MSVCRT functions showing up through names that tzcode doesn't define such as localtime_s or _ftime [or the 32-bit names]), and successfully compiled zdump. I was wondering if anyone had any ideas which approach would be best for implementing the 32-bit functions. Some background: MSVC defines two sets of time functions: for 32-bit and 64-bit time_t. But some functions (e.g. tzset and strftime) are shared between them. (VC2003 defines the default names as 32-bit, and I don't know if VC6 has the 64-bit functions at all - making it work on these versions may be somewhat more difficult) I could: A. Compile separate 32 and 64 bit versions of the library (what happens if a single program tries to call both?) B. Compile a single library with 32 and 64 bit versions of functions, a custom tzset function that calls both (this will pull in most of the 64-bit library when compiling a 32-bit program, but I can avoid pulling in the 32-bit objects when compiling a 64-bit program) C. Write wrapper 32-bit functions for 64-bit functions - a bit less bloated than solution B, but more work. D. ??? I want to eventually customize tzset anyway, to get the local time zone from the system settings when TZ is not set (CLDR contains a mapping from Windows time zone names to tzdata ones). Speaking of which, does anyone on the list have a non-English version of Windows to test something with?