make[3]: Entering directory '/sources/libtorrent-0.13.6/src/utils'
/bin/sh ../../libtool  --tag=CXX   --mode=compile g++ -DHAVE_CONFIG_H -I. -I../..  -I. -I./.. -I../.. -I/usr/include -I/usr/include  -pthread -g -O2 -g -DDEBUG -fvisibility=hidden  -MT diffie_hellman.lo -MD -MP -MF .deps/diffie_hellman.Tpo -c -o diffie_hellman.lo diffie_hellman.cc
libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I../.. -I. -I./.. -I../.. -I/usr/include -I/usr/include -pthread -g -O2 -g -DDEBUG -fvisibility=hidden -MT diffie_hellman.lo -MD -MP -MF .deps/diffie_hellman.Tpo -c diffie_hellman.cc  -fPIC -DPIC -o .libs/diffie_hellman.o
diffie_hellman.cc: In constructor 'torrent::DiffieHellman::DiffieHellman(const unsigned char*, int, const unsigned char*, int)':
diffie_hellman.cc:57:7: error: invalid use of incomplete type 'DH {aka struct dh_st}'
   m_dh->p = BN_bin2bn(prime, primeLength, NULL);
       ^~
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
                ^~~~~
diffie_hellman.cc:57:9: error: invalid use of incomplete type 'DH {aka struct dh_st}'
   m_dh->p = BN_bin2bn(prime, primeLength, NULL);
         ^
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
                ^~~~~
diffie_hellman.cc:58:7: error: invalid use of incomplete type 'DH {aka struct dh_st}'
   m_dh->g = BN_bin2bn(generator, generatorLength, NULL);
       ^~
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
                ^~~~~
diffie_hellman.cc:58:9: error: invalid use of incomplete type 'DH {aka struct dh_st}'
   m_dh->g = BN_bin2bn(generator, generatorLength, NULL);
         ^
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
                ^~~~~
diffie_hellman.cc: In member function 'bool torrent::DiffieHellman::is_valid() const':
diffie_hellman.cc:76:30: error: invalid use of incomplete type 'DH {aka struct dh_st}'
   return m_dh != NULL && m_dh->pub_key != NULL;
                              ^~
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
diffie_hellman.cc:106:19: error: invalid use of incomplete type 'DH {aka struct dh_st}'
     BN_bn2bin(m_dh->pub_key, dest + length - BN_num_bytes(m_dh->pub_key));
                   ^~
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
                ^~~~~
diffie_hellman.cc:106:21: error: invalid use of incomplete type 'DH {aka struct dh_st}'
     BN_bn2bin(m_dh->pub_key, dest + length - BN_num_bytes(m_dh->pub_key));
                     ^~~~~~~
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
                ^~~~~
In file included from diffie_hellman.cc:43:0:
diffie_hellman.cc:106:63: error: invalid use of incomplete type 'DH {aka struct dh_st}'
     BN_bn2bin(m_dh->pub_key, dest + length - BN_num_bytes(m_dh->pub_key));
                                                               ^
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
                ^~~~~
In file included from diffie_hellman.cc:43:0:
diffie_hellman.cc:106:65: error: invalid use of incomplete type 'DH {aka struct dh_st}'
     BN_bn2bin(m_dh->pub_key, dest + length - BN_num_bytes(m_dh->pub_key));
                                                                 ^
In file included from /usr/include/openssl/bn.h:32:0,
                 from diffie_hellman.cc:43:
/usr/include/openssl/ossl_typ.h:104:16: note: forward declaration of 'DH {aka struct dh_st}'
 typedef struct dh_st DH;
                ^~~~~
make[3]: *** [Makefile:413: diffie_hellman.lo] Error 1
make[3]: Leaving directory '/sources/libtorrent-0.13.6/src/utils'
make[2]: *** [Makefile:562: all-recursive] Error 1
make[2]: Leaving directory '/sources/libtorrent-0.13.6/src'
make[1]: *** [Makefile:494: all-recursive] Error 1
make[1]: Leaving directory '/sources/libtorrent-0.13.6'
make: *** [Makefile:402: all] Error 2