-/* User-variables related functions*/
-/* for VM variables */
-XBT_PUBLIC void TRACE_vm_variable_set(const char* vm, const char* variable, double value);
-/* for host variables */
-XBT_PUBLIC void TRACE_host_variable_set(const char* host, const char* variable, double value);
-XBT_PUBLIC void TRACE_host_variable_add(const char* host, const char* variable, double value);
-XBT_PUBLIC void TRACE_host_variable_sub(const char* host, const char* variable, double value);
-/* for link variables */
-XBT_PUBLIC void TRACE_link_variable_set(const char* link, const char* variable, double value);
-/* for link variables, but with src and dst used for get_route */
-XBT_PUBLIC void TRACE_link_srcdst_variable_set(const char* src, const char* dst, const char* variable, double value);
-