The provided smakefile should do most of the work, so just type ``smake'' to compile both programs or ``smake Reminder'' or ``smake ReminderCheck'' to compile only one.
The source files have a some parts between ``#ifdef __SASC'' and ``#endif''. These parts are not needed when compiled with DICE, so if your change applies only to SAS-C, use the same method to keep the source consistent.
Similarly the parts between ``#ifdef _DCC'' and ``#endif'' are not used when compiled with SAS-C, so make sure you don't write anything SAS-C needs into these places.
Notice also that the files RemDICE.c and RemDICE.h are not used under SAS-C. They are GadToolsBox generated source files for DICE only.