Update python2/3 builds

libtdb.spec

@@ -6,6 +6,16 @@
 %global with_python2 1
 %endif
 
+%if (0%{?with_python2} == 1 && 0%{?with_python3} == 0)
+# We need to sent env PYTHON for python2 only build
+%global export_waf_python export PYTHON=%{__python2}
+%endif
+
+%if (0%{?with_python2} == 1 && 0%{?with_python3} == 1)
+# python3 is default and therefore python2 need to be set as extra-python
+%global extra_python --extra-python=%{__python2}
+%endif
+
 Name: libtdb
 Version: 1.3.17
 Release: 1%{?dist}
@@ -70,24 +80,20 @@ Python3 bindings for libtdb
 %autosetup -n tdb-%{version} -p1
 
 %build
-%if 0%{?with_python3}
-PY3_CONFIG_FLAGS=--extra-python=%{__python3}
-%else
-PY3_CONFIG_FLAGS=""
-%endif
-
+%{?export_waf_python}
 %configure --disable-rpath \
            --bundled-libraries=NONE \
            --builtin-libraries=replace \
-           $PY3_CONFIG_FLAGS
+           %{?extra_python}
 
 make %{?_smp_mflags} V=1
 
 %check
+%{?export_waf_python}
 make %{?_smp_mflags} check
 
 %install
-
+%{?export_waf_python}
 make install DESTDIR=$RPM_BUILD_ROOT
 
 # Shared libraries need to be marked executable for