Silencing some of the gcc warnings.

src/misc/bzlib/bzlib.c

@@ -30,6 +30,8 @@
 
 #include "bzlib_private.h"
 
+#pragma warning(disable : 4996)
+
 ABC_NAMESPACE_IMPL_START
 
 #ifdef _WIN32

src/misc/zlib/zlib.h

@@ -35,6 +35,10 @@
 #include <stdlib.h>
 #include <string.h>
 
+#ifndef WIN32
+#include <unistd.h>
+#endif
+
 #include "src/misc/util/abc_global.h"
 
 #include "zconf.h"