fixed rpm builds

mrw-c++.spec.in

@@ -11,9 +11,12 @@ BuildRequires: graphviz
 %endif
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
 %if 0%{?fedora} || 0%{?rhel} || 0%{?rhl} || 0%{?centos} || 0%{?centos_ver} || 0%{?centos_version} || 0%{?mageia}
-BuildRequires: which, pkgconfig, cppunit-devel, rpm-sign
+BuildRequires: which, pkgconfig, cppunit-devel
+%if 0%{?rhel} > 6 || 0%{?rhl} > 6 || 0%{?centos} > 6 || 0%{?fedora} || 0%{?mageia}
+BuildRequires: rpm-sign
+%endif
 %if 0%{?mageia}
-BuildRequires: lsb-release, libltdl-devel
+BuildRequires: lsb-release, gnupg, libltdl-devel
 %else
 BuildRequires: redhat-lsb, gpg, libtool-ltdl-devel
 %endif