[rpms/kig] epel10: Fix Python paths for Python 3.8.

[Kevin Kofler <Kevin@tigcc.ticalc.org>]

            A new commit has been pushed.

            Repo   : rpms/kig
            Branch : epel10
            Commit : 8a08497c0a17f4102c3d73ae13dc1ad6867b5b85
            Author : Kevin Kofler <Kevin@tigcc.ticalc.org>
            Date   : 2019-10-29T15:39:21+01:00
            Stats  : +6/-4 in 1 file(s)
            URL    : https://src.fedoraproject.org/rpms/kig/c/8a08497c0a17f4102c3d73ae13dc1ad6867b5b85?branch=epel10

            Log:
            Fix Python paths for Python 3.8.

Determine them in a portable way.

---
diff --git a/kig.spec b/kig.spec
index 39c1890..078f85d 100644
--- a/kig.spec
+++ b/kig.spec
@@ -1,3 +1,5 @@
+%global _python3_include %(%{__python3} -Ic "from distutils.sysconfig import get_python_inc; print(get_python_inc())")
+%global _python3_lib %{_libdir}/lib%(basename %{_python3_include}).so
 
 Name:    kig
 Summary: Interactive Geometry 
@@ -72,10 +74,10 @@ mkdir %{_target_platform}
 pushd %{_target_platform}
 %{cmake_kf5} .. \
   -DPYTHON_EXECUTABLE:PATH=%{__python3} \
-  -DPYTHON_INCLUDE_DIR=%{_includedir}/python%{python3_version}m \
-  -DPYTHON_LIBRARY=%{_libdir}/libpython%{python3_version}m.so \
-  -DBoostPython_INCLUDE_DIRS="%{_includedir}/python%{python3_version}m;%{_includedir}/boost" \
-  -DBoostPython_LIBRARIES="%{_libdir}/libpython%{python3_version}m.so;%{_libdir}/libboost_python%{python3_version_nodots}.so"
+  -DPYTHON_INCLUDE_DIR=%{_python3_include} \
+  -DPYTHON_LIBRARY=%{_python3_lib} \
+  -DBoostPython_INCLUDE_DIRS="%{_python3_include};%{_includedir}/boost" \
+  -DBoostPython_LIBRARIES="%{_python3_lib};%{_libdir}/libboost_python%{python3_version_nodots}.so"
 popd
 
 %make_build -C %{_target_platform}