File fix-implicit-fortify-decl.patch of Package fmil

diff -Naur a/ThirdParty/Zlib/zlib-1.2.6/gzread.c b/ThirdParty/Zlib/zlib-1.2.6/gzread.c
--- a/ThirdParty/Zlib/zlib-1.2.6/gzread.c	2012-03-09 09:42:04.000000000 +0100
+++ b/ThirdParty/Zlib/zlib-1.2.6/gzread.c	2019-04-10 22:13:13.932774038 +0200
@@ -3,6 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
+#include <unistd.h>
 #include "gzguts.h"
 
 /* Local functions */
diff -Naur a/ThirdParty/Zlib/zlib-1.2.6/gzwrite.c b/ThirdParty/Zlib/zlib-1.2.6/gzwrite.c
--- a/ThirdParty/Zlib/zlib-1.2.6/gzwrite.c	2012-03-09 09:42:04.000000000 +0100
+++ b/ThirdParty/Zlib/zlib-1.2.6/gzwrite.c	2019-04-10 22:12:52.889037784 +0200
@@ -3,6 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
+#define _XOPEN_SOURCE 500
 #include "gzguts.h"
 
 /* Local functions */