-BuildRequires: xml-security-c-devel >= 1.3.1
-BuildRequires: log4cpp-devel >= 0.3.5, cxxtest
+BuildRequires: xml-security-c-devel >= 1.4.0
+BuildRequires: openssl-devel, cxxtest
+%{?_with_log4cpp:BuildRequires: log4cpp-devel >= 0.3.5}
+%{!?_with_log4cpp:BuildRequires: log4shib-devel}