I'm trying to compile openssl-1.0.2m from ports on 10.3-RELEASE-p20.

The following options are enabled:
DOCS EC SHARED THREADS ASM SSE2 SCTP

The following options are disabled:
MAN3 PADLOCK RFC3779 EXPCIPHERS ZLIB RC5 MD2 SSL2 SSL3

Things go fine, until s23_clnt.c
----
cc -I../crypto -I.. -I../include  -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS -pthread -D_THREAD_SAFE -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -O3 -Wall -O2 -pipe -O2 -march=native  -Werror -Qunused-arguments -fstack-protector -fno-strict-aliasing -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DRC4_ASM -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM -DECP_NISTZ256_ASM -c s23_clnt.c -o s23_clnt.o
s23_clnt.c:762:29: error: implicit declaration of function 'SSLv3_client_method' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
                s->method = SSLv3_client_method();
                            ^
s23_clnt.c:762:27: error: incompatible integer to pointer conversion assigning to 'const SSL_METHOD *' (aka 'const struct ssl_method_st *') from 'int'
      [-Werror,-Wint-conversion]
                s->method = SSLv3_client_method();
                          ^ ~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
*** Error code 1
----

SSL3 disabling seems to be broken. Enabling SSE3 causes the build to work.