Im trying to compile latest tpruvot ccminer in nvOC v0019 and I get these error message about BIGNUM on the last step:

In file included from bignum.cpp:8:0:
bignum.hpp:63:24: error: invalid use of incomplete type ‘BIGNUM {aka struct bignum_st}’
 class CBigNum : public BIGNUM


Any tips or suggestions ?

TYIA