Update python2/3 builds

libtevent.spec

@@ -8,6 +8,16 @@
 %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
+
 %global talloc_version 2.1.15
 
 Name: libtevent
@@ -92,27 +102,22 @@ UpdateTimestamps() {
 %autosetup -n tevent-%{version} -p1
 
 %build
-
-%if 0%{?with_python3}
-export PY3_CONFIG_FLAGS=--extra-python=%{__python3}
-%else
-export 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
 
 doxygen doxy.config
 
 %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