*** ./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;
*** ./Makefile.in.ORIG	Mon May  2 10:46:06 2016
--- ./Makefile.in	Mon May  2 10:46:12 2016
***************
*** 230,236 ****
  @BUILDIPV6_TRUE@bwping6_SOURCES = bwping6.c
  @BUILDIPV6_FALSE@man_MANS = bwping.8
  @BUILDIPV6_TRUE@man_MANS = bwping.8 bwping6.8
! AM_CFLAGS = -Wall
  EXTRA_DIST = $(man_MANS)
  all: config.h
  	$(MAKE) $(AM_MAKEFLAGS) all-am
--- 230,236 ----
  @BUILDIPV6_TRUE@bwping6_SOURCES = bwping6.c
  @BUILDIPV6_FALSE@man_MANS = bwping.8
  @BUILDIPV6_TRUE@man_MANS = bwping.8 bwping6.8
! AM_CFLAGS =
  EXTRA_DIST = $(man_MANS)
  all: config.h
  	$(MAKE) $(AM_MAKEFLAGS) all-am