OS-???? [lx] SIGEV_THREAD_ID emulation needed

*** 69,78 ****
--- 69,80 ----
  #define LX_NSIG         64      /* Linux _NSIG */
  
  #define LX_SIGRTMIN     32
  #define LX_SIGRTMAX     LX_NSIG
  
+ #define LX_SIGTIMER     LX_SIGRTMIN
+ 
  extern const int ltos_signo[];
  extern const int stol_signo[];
  
  extern int lx_stol_signo(int, int);
  extern int lx_ltos_signo(int, int);