libtool 2.4 changed lt__PROGRAM__LTX_preloaded_symbols definition to

extern LT_DLSYM_CONST lt_dlsymlist lt__PROGRAM__LTX_preloaded_symbols[];

but there is no easy way to find its version to fix it properly, so it's a
temporary hack to make at least libprelude compile.
Index: libprelude-1.0.0/src/include/prelude-plugin.h
===================================================================
--- libprelude-1.0.0.orig/src/include/prelude-plugin.h	2010-11-06 21:30:18.000000000 +0300
+++ libprelude-1.0.0/src/include/prelude-plugin.h	2010-11-06 21:30:47.000000000 +0300
@@ -61,9 +61,8 @@
  */
 #ifdef PRELUDE_APPLICATION_USE_LIBTOOL2
 # define lt_preloaded_symbols lt__PROGRAM__LTX_preloaded_symbols
-#endif
-
 extern const void *lt_preloaded_symbols[];
+#endif
 
 #define PRELUDE_PLUGIN_SET_PRELOADED_SYMBOLS()         \
         prelude_plugin_set_preloaded_symbols(lt_preloaded_symbols)