*** ./Makefile.am.ORIG	Wed Jul  3 21:06:48 2013
--- ./Makefile.am	Wed Jul  3 21:06:55 2013
***************
*** 8,12 ****
  bwping_SOURCES	= bwping.c
  man_MANS	= bwping.8
  endif
! AM_CFLAGS	= -Wall
  EXTRA_DIST	= $(man_MANS)
--- 8,12 ----
  bwping_SOURCES	= bwping.c
  man_MANS	= bwping.8
  endif
! AM_CFLAGS	=
  EXTRA_DIST	= $(man_MANS)
*** ./bwping.c.ORIG	Wed Jul  3 21:08:57 2013
--- ./bwping.c	Wed Jul  3 21:09:55 2013
***************
*** 155,160 ****
--- 155,162 ----
      (*transmitted_number)++;
  }
  
+ #define MSG_DONTWAIT MSG_NONBLOCK
+ 
  static int recv_ping (int sock, int ident, unsigned int *received_number, unsigned long int *received_volume)
  {
      int                    res, hlen;
*** ./bwping6.c.ORIG	Wed Jul  3 21:09:24 2013
--- ./bwping6.c	Wed Jul  3 21:09:47 2013
***************
*** 120,125 ****
--- 120,127 ----
      (*transmitted_number)++;
  }
  
+ #define MSG_DONTWAIT MSG_NONBLOCK
+ 
  static int recv_ping (int sock, int ident, unsigned int *received_number, unsigned long int *received_volume)
  {
      int                    res;