compiling callback-8.c
ossl_ssl.c:132:27: error: ‘SSLv3_method’ undeclared here (not in a function)
     OSSL_SSL_METHOD_ENTRY(SSLv3),
                           ^
ossl_ssl.c:110:69: note: in definition of macro ‘OSSL_SSL_METHOD_ENTRY’
 #define OSSL_SSL_METHOD_ENTRY(name) { #name, (SSL_METHOD *(*)(void))name##_method }
                                                                     ^
ossl_ssl.c:133:27: error: ‘SSLv3_server_method’ undeclared here (not in a function)
     OSSL_SSL_METHOD_ENTRY(SSLv3_server),
                           ^
ossl_ssl.c:110:69: note: in definition of macro ‘OSSL_SSL_METHOD_ENTRY’
 #define OSSL_SSL_METHOD_ENTRY(name) { #name, (SSL_METHOD *(*)(void))name##_method }
                                                                     ^
ossl_ssl.c:134:27: error: ‘SSLv3_client_method’ undeclared here (not in a function)
     OSSL_SSL_METHOD_ENTRY(SSLv3_client),
                           ^
ossl_ssl.c:110:69: note: in definition of macro ‘OSSL_SSL_METHOD_ENTRY’
 #define OSSL_SSL_METHOD_ENTRY(name) { #name, (SSL_METHOD *(*)(void))name##_method }
                                                                     ^
Makefile:278: recipe for target 'ossl_ssl.o' failed
make[2]: *** [ossl_ssl.o] Error 1
make[2]: Leaving directory '/tmp/ruby-build.20160214211057.21770/ruby-2.0.0-p647/ext/openssl'
exts.mk:173: recipe for target 'ext/openssl/all' failed
make[1]: *** [ext/openssl/all] Error 2
make[1]: *** Waiting for unfinished jobs....
installing default callback libraries
installing default nkf libraries
linking shared-object nkf.so
make[2]: Leaving directory '/tmp/ruby-build.20160214211057.21770/ruby-2.0.0-p647/ext/nkf'
linking shared-object dl/callback.so
make[2]: Leaving directory '/tmp/ruby-build.20160214211057.21770/ruby-2.0.0-p647/ext/dl/callback'
make[1]: Leaving directory '/tmp/ruby-build.20160214211057.21770/ruby-2.0.0-p647'
uncommon.mk:179: recipe for target 'build-ext' failed
make: *** [build-ext] Error 2