File sshguard-gcc5.patch of Package sshguard

diff -crB sshguard-2.3.1/src/blocker/sshguard_whitelist.c sshguard-2.3.1-dev/src/blocker/sshguard_whitelist.c
*** sshguard-2.3.1/src/blocker/sshguard_whitelist.c	2018-12-16 03:41:51.000000000 +0100
--- sshguard-2.3.1/src/blocker/sshguard_whitelist.c	2019-01-24 09:34:29.600313298 +0100
***************
*** 18,23 ****
--- 18,24 ----
   * SSHGuard. See http://www.sshguard.net
   */
  
+ #define _GNU_SOURCE
  #include <arpa/inet.h>
  #include <assert.h>
  #include <netdb.h>