/tmp/cc3vtThx.o: In function `encode(std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >, std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >)':
AES_artur.cpp:(.text+0x3b): undefined reference to `EVP_CIPHER_CTX_init'
AES_artur.cpp:(.text+0x52): undefined reference to `EVP_aes_128_ecb'
AES_artur.cpp:(.text+0x72): undefined reference to `EVP_EncryptInit_ex'
AES_artur.cpp:(.text+0x86): undefined reference to `EVP_CIPHER_CTX_set_padding'
AES_artur.cpp:(.text+0xd7): undefined reference to `EVP_EncryptUpdate'
AES_artur.cpp:(.text+0xe0): undefined reference to `ERR_get_error'
AES_artur.cpp:(.text+0xed): undefined reference to `ERR_error_string'
AES_artur.cpp:(.text+0x14e): undefined reference to `EVP_EncryptFinal_ex'
AES_artur.cpp:(.text+0x157): undefined reference to `ERR_get_error'
AES_artur.cpp:(.text+0x164): undefined reference to `ERR_error_string'
/tmp/cc3vtThx.o: In function `decode(std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >, std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >)':
AES_artur.cpp:(.text+0x27a): undefined reference to `EVP_CIPHER_CTX_init'
AES_artur.cpp:(.text+0x291): undefined reference to `EVP_aes_128_ecb'
AES_artur.cpp:(.text+0x2b1): undefined reference to `EVP_DecryptInit_ex'
AES_artur.cpp:(.text+0x2c5): undefined reference to `EVP_CIPHER_CTX_set_padding'
AES_artur.cpp:(.text+0x316): undefined reference to `EVP_DecryptUpdate'
AES_artur.cpp:(.text+0x31f): undefined reference to `ERR_get_error'
AES_artur.cpp:(.text+0x32c): undefined reference to `ERR_error_string'
AES_artur.cpp:(.text+0x38d): undefined reference to `EVP_DecryptFinal_ex'
AES_artur.cpp:(.text+0x396): undefined reference to `ERR_get_error'
AES_artur.cpp:(.text+0x3a3): undefined reference to `ERR_error_string'
collect2: error: ld returned 1 exit status