-XBT_PUBLIC(void) TRACE_link_srcdst_variable_set (void *src, void *dst, const char *variable, double value);
-XBT_PUBLIC(void) TRACE_link_srcdst_variable_add (void *src, void *dst, const char *variable, double value);
-XBT_PUBLIC(void) TRACE_link_srcdst_variable_sub (void *src, void *dst, const char *variable, double value);
-XBT_PUBLIC(void) TRACE_link_srcdst_variable_set_with_time (double time, void *src, void *dst, const char *variable, double value);
-XBT_PUBLIC(void) TRACE_link_srcdst_variable_add_with_time (double time, void *src, void *dst, const char *variable, double value);
-XBT_PUBLIC(void) TRACE_link_srcdst_variable_sub_with_time (double time, void *src, void *dst, const char *variable, double value);
+XBT_PUBLIC(void) TRACE_link_srcdst_variable_set (const char *src, const char *dst, const char *variable, double value);
+XBT_PUBLIC(void) TRACE_link_srcdst_variable_add (const char *src, const char *dst, const char *variable, double value);
+XBT_PUBLIC(void) TRACE_link_srcdst_variable_sub (const char *src, const char *dst, const char *variable, double value);
+XBT_PUBLIC(void) TRACE_link_srcdst_variable_set_with_time (double time, const char *src, const char *dst, const char *variable, double value);
+XBT_PUBLIC(void) TRACE_link_srcdst_variable_add_with_time (double time, const char *src, const char *dst, const char *variable, double value);
+XBT_PUBLIC(void) TRACE_link_srcdst_variable_sub_with_time (double time, const char *src, const char *dst, const char *variable, double value);