* ext/openssl/extconf.rb: asume it doesn't have SSLv2 related

functions when OPENSSL_NO_SSL2 is defined.
  Usually openssl's header and the library (libssl) have the same
  set of functions, but on some environment the library has functions
  whose headers doesn't declare. (openssl/opensslconf.h and libsso.so
  aren't be synchronized)
  To detect such case explicitly check feature macro and remove
  related functions.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54950 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,14 @@
+Sun May  8 21:01:14 2016  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* ext/openssl/extconf.rb: asume it doesn't have SSLv2 related
+	  functions when OPENSSL_NO_SSL2 is defined.
+	  Usually openssl's header and the library (libssl) have the same
+	  set of functions, but on some environment the library has functions
+	  whose headers doesn't declare. (openssl/opensslconf.h and libsso.so
+	  aren't be synchronized)
+	  To detect such case explicitly check feature macro and remove
+	  related functions.
+
 Sun May  8 18:51:33 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* file.c (rb_home_dir_of): return the default home path if the

ext/openssl/extconf.rb

@@ -152,6 +152,8 @@ have_struct_member("EVP_CIPHER_CTX", "engine", "openssl/evp.h")
 have_struct_member("X509_ATTRIBUTE", "single", "openssl/x509.h")
 have_macro("OPENSSL_FIPS", ['openssl/opensslconf.h']) && $defs.push("-DHAVE_OPENSSL_FIPS")
 have_macro("EVP_CTRL_GCM_GET_TAG", ['openssl/evp.h']) && $defs.push("-DHAVE_AUTHENTICATED_ENCRYPTION")
+have_macro("OPENSSL_NO_SSL2","openssl/opensslconf.h") && $defs.reject!{|x|/HAVE_SSLV2_/===x}
+have_macro("OPENSSL_NO_SSL3_METHOD","openssl/opensslconf.h") && $defs.reject!{|x|/HAVE_SSLV3_/===x}
 
 Logging::message "=== Checking done. ===\n"