Build python3 bindings just for fedora

It simplify backporting to epel/rhel

libtdb.spec

@@ -1,3 +1,9 @@
+%if 0%{?fedora}
+%global with_python3 1
+%else
+%global with_python3 0
+%endif
+
 Name: libtdb
 Version: 1.3.12
 Release: 4%{?dist}
@@ -10,7 +16,9 @@ Source: http://samba.org/ftp/tdb/tdb-%{version}.tar.gz
 BuildRequires: libxslt
 BuildRequires: docbook-style-xsl
 BuildRequires: python2-devel
+%if 0%{?with_python3}
 BuildRequires: python3-devel
+%endif
 
 Provides: bundled(libreplace)
 
@@ -44,6 +52,7 @@ Requires: libtdb = %{version}-%{release}
 %description -n python-tdb
 Python bindings for libtdb
 
+%if 0%{?with_python3}
 %package -n python3-tdb
 Group: Development/Libraries
 Summary: Python3 bindings for the Tdb library
@@ -51,15 +60,23 @@ Requires: libtdb = %{version}-%{release}
 
 %description -n python3-tdb
 Python3 bindings for libtdb
+%endif
 
 %prep
 %setup -q -n tdb-%{version}
 
 %build
+%if 0%{?with_python3}
+PY3_CONFIG_FLAGS=--extra-python=%{__python3}
+%else
+PY3_CONFIG_FLAGS=""
+%endif
+
 %configure --disable-rpath \
            --bundled-libraries=NONE \
            --builtin-libraries=replace \
-           --extra-python=%{__python3}
+           $PY3_CONFIG_FLAGS
+
 make %{?_smp_mflags} V=1
 
 %install
@@ -99,11 +116,13 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/libtdb.a
 %{python_sitearch}/tdb.so
 %{python_sitearch}/_tdb_text.py*
 
+%if 0%{?with_python3}
 %files -n python3-tdb
 %defattr(-,root,root,-)
 %{python3_sitearch}/__pycache__/_tdb_text.cpython*.py[co]
 %{python3_sitearch}/tdb.cpython*.so
 %{python3_sitearch}/_tdb_text.py
+%endif
 
 %post -p /sbin/ldconfig
 
@@ -113,9 +132,11 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/libtdb.a
 
 %postun -n python-tdb -p /sbin/ldconfig
 
+%if 0%{?with_python3}
 %post -n python3-tdb -p /sbin/ldconfig
 
 %postun -n python3-tdb -p /sbin/ldconfig
+%endif
 
 %changelog
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.3.12-4