do not include CMS code with LIBRESSL, as it has no CMS code

Author: mcr

ext/openssl/extconf.rb

@@ -165,6 +165,7 @@ def find_openssl_library
 have_func("X509_get0_notBefore")
 have_func("SSL_SESSION_get_protocol_version")
 have_func("EVP_PBE_scrypt")
+have_func("CMS_sign")
 
 Logging::message "=== Checking done. ===\n"
 

ext/openssl/ossl.c

@@ -1202,7 +1202,9 @@ Init_openssl(void)
     Init_ossl_ns_spki();
     Init_ossl_pkcs12();
     Init_ossl_pkcs7();
+#if defined(HAVE_CMS_SIGN)
     Init_ossl_cms();
+#endif
     Init_ossl_pkey();
     Init_ossl_rand();
     Init_ossl_ssl();

ext/openssl/ossl_cms.c

@@ -11,6 +11,7 @@
  */
 #include "ossl.h"
 
+#if defined(HAVE_CMS_SIGN)
 /*
  * The CMS_ContentInfo is the primary data structure which this module creates and maintains
  * Is is called OpenSSL::CMS::ContentInfo in ruby.
@@ -496,3 +497,5 @@ Init_ossl_cms(void)
     DefCMSConst(STREAM);
     DefCMSConst(PARTIAL);
 }
+
+#endif /* HAVE_CMS_SIGN */