From: Justin Hickey <jhickey@hpcc.nectec.or.th>
Dear Huidae Cho and others
I'm trying to compile grass on our SGI machines and I have found that
the code in src/raster/r.topmodel/file_io.c access a time zone variable
in the tm struct inside /usr/include/time.h. Both SGI and Cygwin do not
have that variable in their tm struct. Since it is better to solve a
problem directly instead of using preprocessor #ifdef's could the time
zone value be replaced with the POSIX tzname (also in time.h)? Or since
the time zone is only used as output, can it be removed completely? How
important is it to your program Huidae?Just some suggestions.
OK, i removed it. That's nothing to me. 
Regards,
Huidae Cho