g++ -o aescrack -l beecrypt aescrack.cc
/tmp/ccHfaL2g.o: In function `crackaes::crackit(unsigned char*)':
aescrack.cc:(.text._ZN8crackaes7crackitEPh[crackaes::crackit(unsigned char*)]+0xa2): undefined reference to `gcry_cipher_open'
aescrack.cc:(.text._ZN8crackaes7crackitEPh[crackaes::crackit(unsigned char*)]+0xc6): undefined reference to `gcry_cipher_ctl'
aescrack.cc:(.text._ZN8crackaes7crackitEPh[crackaes::crackit(unsigned char*)]+0xfd): undefined reference to `gcry_cipher_encrypt'
aescrack.cc:(.text._ZN8crackaes7crackitEPh[crackaes::crackit(unsigned char*)]+0x10a): undefined reference to `gcry_cipher_close'
collect2: ld returned 1 exit status