void lmm_constraint_free(lmm_system_t sys, lmm_constraint_t cnst);
+double lmm_constraint_get_usage(lmm_constraint_t cnst);
+
XBT_PUBLIC(lmm_variable_t) lmm_variable_new(lmm_system_t sys, void *id,
double weight_value,
double bound,
int number_of_constraints);
-void lmm_variable_free(lmm_system_t sys, lmm_variable_t var);
+XBT_PUBLIC(void) lmm_variable_free(lmm_system_t sys, lmm_variable_t var);
XBT_PUBLIC(double) lmm_variable_getvalue(lmm_variable_t var);
XBT_PUBLIC(double) lmm_variable_getbound(lmm_variable_t var);