ac_python_module

Checks for Python module.

If fatal is non-empty then absence of a module will trigger an error.

AC_DEFUN([AC_PYTHON_MODULE],[
    if test -z $PYTHON;
    then
        PYTHON="python"
    fi
    PYTHON_NAME=`basename $PYTHON`
    AC_MSG_CHECKING($PYTHON_NAME module: $1)
        $PYTHON -c "import $1" 2>/dev/null
        if test $? -eq 0;
        then
                AC_MSG_RESULT(yes)
                eval AS_TR_CPP(HAVE_PYMOD_$1)=yes
        else
                AC_MSG_RESULT(no)
                eval AS_TR_CPP(HAVE_PYMOD_$1)=no
                #
                if test -n "$2"
                then
                        AC_MSG_ERROR(failed to find required module $1)
                        exit 1
                fi
        fi
])

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