Here is a list of all macros with links to the files they belong to:

CALC_API : libcalc.h
CALC_ERROR : libcalc_const.h
CALC_EXPORT : libcalc.h
CALC_KIND_ADD : libcalc_const.h
CALC_KIND_DIVIDE : libcalc_const.h
CALC_KIND_MULTIPLY : libcalc_const.h
CALC_KIND_SUBTRACT : libcalc_const.h
CALC_SUCCESS : libcalc_const.h