-XBT_PUBLIC lmm_system_t lmm_system_new(void);
-XBT_PUBLIC void lmm_system_free(lmm_system_t sys);
-XBT_PUBLIC void lmm_variable_disable(lmm_system_t sys, lmm_variable_t var);
+XBT_PUBLIC(lmm_system_t) lmm_system_new(void);
+XBT_PUBLIC(void) lmm_system_free(lmm_system_t sys);
+XBT_PUBLIC(void) lmm_variable_disable(lmm_system_t sys, lmm_variable_t var);