+AC_C_CONST
+AC_C_INLINE
+
+PKG_CHECK_MODULES([GLIB], [glib-2.0])
+AC_SUBST(GLIB_CFLAGS)
+AC_SUBST(GLIB_LIBS)
+
+PKG_CHECK_MODULES([GMODULE], [gmodule-2.0])
+AC_SUBST(GMODULE_CFLAGS)
+AC_SUBST(GMODULE_LIBS)
+
+AC_PATH_PROG([FLEX], [flex])
+test "$FLEX" || AC_MSG_ERROR([flex not found])
+
+AC_PATH_PROG([YACC], [yacc])
+test "YACC" || AC_MSG_ERROR([yacc not found])