SSL lib

[Maria Dolores Moral]

Hello. I am working with FreeBSD
I have included <openssl/ss.h> in that files, and I obtain the following 
error:

IPv6Router# gcc -lssl echo_server.c ssl_common.c -o ssl
/tmp/ccN7GB0Z.o: In function `main':
/tmp/ccN7GB0Z.o(.text+0x170): undefined reference to `BIO_new_socket'
/tmp/ccN7GB0Z.o(.text+0x20f): undefined reference to `BIO_read'
/tmp/ccN7GB0Z.o(.text+0x262): undefined reference to `BIO_write'
/tmp/ccN7GB0Z.o(.text+0x27c): undefined reference to `BIO_ctrl'
/tmp/ccZzO4nR.o: In function `ssl_initialize_context':
/tmp/ccZzO4nR.o(.text+0x2e): undefined reference to `BIO_new_fp'
/tmp/ccZzO4nR.o: In function `FatalError':
/tmp/ccZzO4nR.o(.text+0x231): undefined reference to `BIO_printf'
/tmp/ccZzO4nR.o(.text+0x242): undefined reference to `ERR_print_errors'
/tmp/ccZzO4nR.o: In function `SSL_Error':
/tmp/ccZzO4nR.o(.text+0x35b): undefined reference to `ERR_print_errors'
/usr/lib/libssl.so: undefined reference to `EVP_DigestInit'
/usr/lib/libssl.so: undefined reference to `BIO_find_type'
/usr/lib/libssl.so: undefined reference to `EVP_enc_null'
/usr/lib/libssl.so: undefined reference to `EVP_CIPHER_CTX_init'
/usr/lib/libssl.so: undefined reference to `X509_NAME_dup'
/usr/lib/libssl.so: undefined reference to `COMP_compress_block'
/usr/lib/libssl.so: undefined reference to `EVP_rc2_cbc'
/usr/lib/libssl.so: undefined reference to `sk_new_null'
/usr/lib/libssl.so: undefined reference to `X509_STORE_get_by_subject'
/usr/lib/libssl.so: undefined reference to `lh_free'
/usr/lib/libssl.so: undefined reference to `EVP_VerifyFinal'
/usr/lib/libssl.so: undefined reference to `COMP_CTX_new'
/usr/lib/libssl.so: undefined reference to `sk_dup'
/usr/lib/libssl.so: undefined reference to `X509_STORE_CTX_set_ex_data'
/usr/lib/libssl.so: undefined reference to `EVP_DigestFinal'
/usr/lib/libssl.so: undefined reference to `X509_free'
/usr/lib/libssl.so: undefined reference to `CRYPTO_get_ex_data'
/usr/lib/libssl.so: undefined reference to `BN_bin2bn'
/usr/lib/libssl.so: undefined reference to `CRYPTO_get_ex_new_index'
/usr/lib/libssl.so: undefined reference to `PEM_read_bio_RSAPrivateKey'
/usr/lib/libssl.so: undefined reference to `BN_bn2bin'
/usr/lib/libssl.so: undefined reference to `RAND_add'
/usr/lib/libssl.so: undefined reference to `BIO_s_socket'
/usr/lib/libssl.so: undefined reference to `asn1_add_error'
/usr/lib/libssl.so: undefined reference to `d2i_RSAPrivateKey'
/usr/lib/libssl.so: undefined reference to `sk_num'
/usr/lib/libssl.so: undefined reference to `BIO_free_all'
/usr/lib/libssl.so: undefined reference to `BIO_get_retry_reason'
/usr/lib/libssl.so: undefined reference to `X509_STORE_new'
/usr/lib/libssl.so: undefined reference to `SHA1_Init'
/usr/lib/libssl.so: undefined reference to `HMAC_Final'
/usr/lib/libssl.so: undefined reference to `EVP_md5'
/usr/lib/libssl.so: undefined reference to `ASN1_object_size'
/usr/lib/libssl.so: undefined reference to `EVP_get_cipherbyname'
/usr/lib/libssl.so: undefined reference to `EVP_rc4'
/usr/lib/libssl.so: undefined reference to `EVP_add_cipher'
/usr/lib/libssl.so: undefined reference to `ASN1_get_object'
/usr/lib/libssl.so: undefined reference to `BIO_s_file'
/usr/lib/libssl.so: undefined reference to `COMP_expand_block'
/usr/lib/libssl.so: undefined reference to `BIO_snprintf'
/usr/lib/libssl.so: undefined reference to `d2i_RSAPrivateKey_bio'
/usr/lib/libssl.so: undefined reference to `ASN1_dup'
/usr/lib/libssl.so: undefined reference to `RSA_sign'
/usr/lib/libssl.so: undefined reference to `ERR_peek_error'
/usr/lib/libssl.so: undefined reference to `PEM_read_bio_PrivateKey'
/usr/lib/libssl.so: undefined reference to `lh_retrieve'
/usr/lib/libssl.so: undefined reference to `X509_get_pubkey'
/usr/lib/libssl.so: undefined reference to `CRYPTO_dup_ex_data'
/usr/lib/libssl.so: undefined reference to `DH_generate_key'
/usr/lib/libssl.so: undefined reference to `DH_size'
/usr/lib/libssl.so: undefined reference to `i2d_ASN1_INTEGER'
/usr/lib/libssl.so: undefined reference to `lh_doall_arg'
/usr/lib/libssl.so: undefined reference to `CRYPTO_set_ex_data'
/usr/lib/libssl.so: undefined reference to `SHA1_Update'
/usr/lib/libssl.so: undefined reference to `CRYPTO_lock'
/usr/lib/libssl.so: undefined reference to `DSA_verify'
/usr/lib/libssl.so: undefined reference to `sk_pop_free'
/usr/lib/libssl.so: undefined reference to `SHA1_Final'
/usr/lib/libssl.so: undefined reference to `BIO_puts'
/usr/lib/libssl.so: undefined reference to `X509_verify_cert_error_string'
/usr/lib/libssl.so: undefined reference to `BN_num_bits'
/usr/lib/libssl.so: undefined reference to `ASN1_check_infinite_end'
/usr/lib/libssl.so: undefined reference to `X509_STORE_CTX_purpose_inherit'
/usr/lib/libssl.so: undefined reference to `BUF_MEM_new'
/usr/lib/libssl.so: undefined reference to `BIO_free'
/usr/lib/libssl.so: undefined reference to `EVP_dss1'
/usr/lib/libssl.so: undefined reference to `DH_new'
/usr/lib/libssl.so: undefined reference to `d2i_PrivateKey'
/usr/lib/libssl.so: undefined reference to `X509_STORE_set_default_paths'
/usr/lib/libssl.so: undefined reference to `DSA_sign'
/usr/lib/libssl.so: undefined reference to `DH_compute_key'
/usr/lib/libssl.so: undefined reference to `CRYPTO_add_lock'
/usr/lib/libssl.so: undefined reference to `COMP_CTX_free'
/usr/lib/libssl.so: undefined reference to `sk_push'
/usr/lib/libssl.so: undefined reference to `EVP_sha1'
/usr/lib/libssl.so: undefined reference to `X509_STORE_CTX_init'
/usr/lib/libssl.so: undefined reference to `i2d_DHparams'
/usr/lib/libssl.so: undefined reference to `RSA_private_decrypt'
/usr/lib/libssl.so: undefined reference to `EVP_CipherInit'
/usr/lib/libssl.so: undefined reference to `ERR_put_error'
/usr/lib/libssl.so: undefined reference to `RSA_new'
/usr/lib/libssl.so: undefined reference to `sk_set_cmp_func'
/usr/lib/libssl.so: undefined reference to `EVP_PKEY_assign'
/usr/lib/libssl.so: undefined reference to `CRYPTO_free'
/usr/lib/libssl.so: undefined reference to `OBJ_NAME_add'
/usr/lib/libssl.so: undefined reference to `sk_new'
/usr/lib/libssl.so: undefined reference to `EVP_PKEY_type'
/usr/lib/libssl.so: undefined reference to `X509_TRUST_get_by_id'
/usr/lib/libssl.so: undefined reference to `d2i_ASN1_INTEGER'
/usr/lib/libssl.so: undefined reference to `sk_zero'
/usr/lib/libssl.so: undefined reference to `X509_verify_cert'
/usr/lib/libssl.so: undefined reference to `sk_free'
/usr/lib/libssl.so: undefined reference to `BIO_new'
/usr/lib/libssl.so: undefined reference to `d2i_X509_bio'
/usr/lib/libssl.so: undefined reference to `X509_check_private_key'
/usr/lib/libssl.so: undefined reference to `MD5_Init'
/usr/lib/libssl.so: undefined reference to `EVP_CIPHER_CTX_cleanup'
/usr/lib/libssl.so: undefined reference to `X509_PURPOSE_get_by_id'
/usr/lib/libssl.so: undefined reference to `sk_value'
/usr/lib/libssl.so: undefined reference to `CRYPTO_new_ex_data'
/usr/lib/libssl.so: undefined reference to `BIO_pop'
/usr/lib/libssl.so: undefined reference to `EVP_PKEY_copy_parameters'
/usr/lib/libssl.so: undefined reference to `X509_get_subject_name'
/usr/lib/libssl.so: undefined reference to `EVP_PKEY_new'
/usr/lib/libssl.so: undefined reference to `i2d_X509_NAME'
/usr/lib/libssl.so: undefined reference to `RSA_public_encrypt'
/usr/lib/libssl.so: undefined reference to `i2d_X509'
/usr/lib/libssl.so: undefined reference to `PEM_read_bio_X509'
/usr/lib/libssl.so: undefined reference to `MD5_Final'
/usr/lib/libssl.so: undefined reference to `ERR_clear_error'
/usr/lib/libssl.so: undefined reference to `EVP_DigestUpdate'
/usr/lib/libssl.so: undefined reference to `OBJ_obj2nid'
/usr/lib/libssl.so: undefined reference to `OBJ_bsearch'
/usr/lib/libssl.so: undefined reference to `sk_delete'
/usr/lib/libssl.so: undefined reference to `RAND_bytes'
/usr/lib/libssl.so: undefined reference to `RSAPrivateKey_dup'
/usr/lib/libssl.so: undefined reference to `asn1_Finish'
/usr/lib/libssl.so: undefined reference to `BIO_copy_next_retry'
/usr/lib/libssl.so: undefined reference to `sk_set'
/usr/lib/libssl.so: undefined reference to `EVP_des_cbc'
/usr/lib/libssl.so: undefined reference to `EVP_PKEY_missing_parameters'
/usr/lib/libssl.so: undefined reference to `BIO_callback_ctrl'
/usr/lib/libssl.so: undefined reference to `DH_free'
/usr/lib/libssl.so: undefined reference to `X509_STORE_CTX_cleanup'
/usr/lib/libssl.so: undefined reference to `BUF_MEM_free'
/usr/lib/libssl.so: undefined reference to `EVP_SignFinal'
/usr/lib/libssl.so: undefined reference to `sk_find'
/usr/lib/libssl.so: undefined reference to `X509_certificate_type'
/usr/lib/libssl.so: undefined reference to `EVP_MD_CTX_copy'
/usr/lib/libssl.so: undefined reference to `ASN1_INTEGER_get'
/usr/lib/libssl.so: undefined reference to `RSA_free'
/usr/lib/libssl.so: undefined reference to `d2i_DHparams'
/usr/lib/libssl.so: undefined reference to `BIO_int_ctrl'
/usr/lib/libssl.so: undefined reference to `BIO_f_buffer'
/usr/lib/libssl.so: undefined reference to `ERR_get_error'
/usr/lib/libssl.so: undefined reference to `EVP_DecryptInit'
/usr/lib/libssl.so: undefined reference to `sk_shift'
/usr/lib/libssl.so: undefined reference to `lh_new'
/usr/lib/libssl.so: undefined reference to `CRYPTO_free_ex_data'
/usr/lib/libssl.so: undefined reference to `ASN1_INTEGER_set'
/usr/lib/libssl.so: undefined reference to `i2d_ASN1_OCTET_STRING'
/usr/lib/libssl.so: undefined reference to `X509_STORE_CTX_get_ex_new_index'
/usr/lib/libssl.so: undefined reference to `RSA_verify'
/usr/lib/libssl.so: undefined reference to `BN_dup'
/usr/lib/libssl.so: undefined reference to `ERR_add_error_data'
/usr/lib/libssl.so: undefined reference to `X509_NAME_cmp'
/usr/lib/libssl.so: undefined reference to `EVP_PKEY_size'
/usr/lib/libssl.so: undefined reference to `EVP_add_digest'
/usr/lib/libssl.so: undefined reference to `HMAC_cleanup'
/usr/lib/libssl.so: undefined reference to `BIO_push'
/usr/lib/libssl.so: undefined reference to `EVP_EncryptInit'
/usr/lib/libssl.so: undefined reference to `X509_get_issuer_name'
/usr/lib/libssl.so: undefined reference to `ASN1_put_object'
/usr/lib/libssl.so: undefined reference to `X509_get_ext_count'
/usr/lib/libssl.so: undefined reference to `EVP_des_ede3_cbc'
/usr/lib/libssl.so: undefined reference to `X509_STORE_free'
/usr/lib/libssl.so: undefined reference to `ERR_load_crypto_strings'
/usr/lib/libssl.so: undefined reference to `BUF_MEM_grow'
/usr/lib/libssl.so: undefined reference to `lh_insert'
/usr/lib/libssl.so: undefined reference to `X509_STORE_load_locations'
/usr/lib/libssl.so: undefined reference to `X509_NAME_free'
/usr/lib/libssl.so: undefined reference to `d2i_ASN1_OCTET_STRING'
/usr/lib/libssl.so: undefined reference to `CRYPTO_malloc'
/usr/lib/libssl.so: undefined reference to `lh_delete'
/usr/lib/libssl.so: undefined reference to `BN_clear_free'
/usr/lib/libssl.so: undefined reference to `HMAC_Init'
/usr/lib/libssl.so: undefined reference to `d2i_X509_NAME'
/usr/lib/libssl.so: undefined reference to `RSA_flags'
/usr/lib/libssl.so: undefined reference to `d2i_X509'
/usr/lib/libssl.so: undefined reference to `asn1_GetSequence'
/usr/lib/libssl.so: undefined reference to `RSA_size'
/usr/lib/libssl.so: undefined reference to `RAND_pseudo_bytes'
/usr/lib/libssl.so: undefined reference to `BIO_s_connect'
/usr/lib/libssl.so: undefined reference to `EVP_PKEY_free'
/usr/lib/libssl.so: undefined reference to `MD5_Update'
/usr/lib/libssl.so: undefined reference to `HMAC_Update'
/usr/lib/libssl.so: undefined reference to `X509_STORE_CTX_set_verify_cb'
/usr/lib/libssl.so: undefined reference to `ERR_load_strings'
/usr/lib/libssl.so: undefined reference to `EVP_md2'
/usr/lib/libssl.so: undefined reference to `EVP_get_digestbyname'

If someboy have had similar error an know the solution, please help me.
Thanks a lot