If the name of the timezone has more than a few characters a crash can occur on pentium vxWorks iocs. See ansiTime in the vxWorks reference manual for details about TIMEZONE.
src/libCom/osi/os/default/epicsReadline.c used a char variable to hold the return value from getc(), and compared this against EOF. getc() returns int not char because ANSI C allows char to be unsigned if the architecture finds that easier, thus EOF can never be stored in a char on a PowerPC CPU. char should be changed to int or signed char.
=======