dnl Find the version of python we are using and ensure the library and header
dnl are available.. Also get all the paths and options from the python setup
dnl makefile.
AC_CACHE_CHECK("python version", ac_cv_ver_python, [ac_cv_ver_python=`python -c 'import sys;print sys.version[[:3]]' 2> /dev/null`])
AC_CACHE_CHECK("python prefix", ac_cv_prefix_python, [ac_cv_prefix_python=`python -c 'import sys;print sys.prefix' 2> /dev/null`])
AC_CACHE_CHECK("python exec prefix", ac_cv_execprefix_python, [ac_cv_execprefix_python=`python -c 'import sys;print sys.exec_prefix' 2> /dev/null`])
if test "x$ac_cv_ver_python" != "x"; then

   cat > pytest << EOF
include $ac_cv_execprefix_python/lib/python$ac_cv_ver_python/config/Makefile
.PHONY: libs include
libs:
	@echo \$(MODLIBS) \$(LIBS) \$(SYSLIBS)
include:
	@echo \$(INCLUDEPY)
EOF

   AC_CACHE_CHECK("python libs", ac_cv_libs_python, [ac_cv_libs_python=`make -s -f pytest libs 2> /dev/null`])
   AC_CACHE_CHECK("python include", ac_cv_include_python, [ac_cv_include_python=`make -s -f pytest include 2> /dev/null`])
   AC_CHECK_HEADER(python$ac_cv_ver_python/Python.h,
     [AC_CHECK_LIB(python$ac_cv_ver_python,PyArg_ParseTuple,
        [AC_DEFINE(HAVE_PYTHONLIB) PYTHONLIB="-lpython$ac_cv_ver_python $ac_cv_libs_python"],[],$ac_cv_libs_python)])
   AC_SUBST(PYTHONLIB)

   PYTHONVER=$ac_cv_ver_python
   PYTHONPREFIX=$ac_cv_prefix_python
   PYTHONEXECPREFIX=$ac_cv_execprefix_python
   PYTHONINCLUDE=$ac_cv_include_python
   AC_SUBST(PYTHONVER)
   AC_SUBST(PYTHONPREFIX)
   AC_SUBST(PYTHONEXECPREFIX)
   AC_SUBST(PYTHONINCLUDE)
fi