Hi,make error how fix it?

[TLX2020]

cd obj && mkdir -p SECPK1 cd obj && mkdir -p GPU Making Kangaroo... g++ obj/SECPK1/IntGroup.o obj/main.o obj/SECPK1/Random.o obj/Timer.o obj/SECPK1/Int.o obj/SECPK1/IntMod.o obj/SECPK1/Point.o obj/SECPK1/SECP256K1.o obj/Kangaroo.o obj/HashTable.o obj/Thread.o obj/Check.o obj/Backup.o obj/Network.o obj/Merge.o obj/PartMerge.o -lpthread -o kangaroo /usr/bin/ld: obj/main.o: in function main': main.cpp:(.text.startup+0x51c): undefined reference to GPUEngine::PrintCudaInfo()' collect2: error: ld returned 1 exit status make: *** [Makefile:86: bsgs] Error 1