Made xorriso-standalone aware of libcdio system adaptor

libisoburn/trunk/xorriso/configure_ac.txt

@@ -180,6 +180,33 @@ fi
 AC_SUBST(ZLIB_DEF)
 
 
+AC_ARG_ENABLE(libcdio,
+[  --enable-libcdio         Enable EXPERIMENTAL use of libcdio as system adapter, default=no],
+               , enable_libcdio=no)
+if test x$enable_libcdio = xyes; then
+dnl Check whether there is libcdio-devel and libcdio-runtime.
+dnl If not, erase this macro
+    LIBCDIO_DEF="-DLibburn_use_libcdiO"
+dnl The empty yes case obviously causes -lacl to be linked
+    AC_CHECK_HEADER(cdio/cdio.h, AC_CHECK_LIB(cdio, mmc_last_cmd_sense, , LIBCDIO_DEF= ), LIBCDIO_DEF= )
+else
+    LIBCDIO_DEF=
+fi
+if test x$LIBCDIO_DEF = x
+then
+    if test x$enable_libcdio = xyes
+    then
+      echo "WARNING: could not enable use of libcdio as system adapter"
+    fi
+else
+    echo "enabled  EXPERIMENTAL use of libcdio as system adapter"
+
+    LIBCDIO_REQUIRED=0.83
+    PKG_CHECK_MODULES(LIBCDIO, libcdio >= $LIBCDIO_REQUIRED)
+fi
+AC_SUBST(LIBCDIO_DEF)
+
+
 AC_ARG_ENABLE(external-filters,
 [  --enable-external-filters   Enable use of external filter programs by xorriso, default=yes],
                , enable_external_filters=yes)