quell deprecation messages for posix and c-style string functions
diff --git a/msvc/config.h b/msvc/config.h
index b844d34..66e6a87 100644
--- a/msvc/config.h
+++ b/msvc/config.h
@@ -8,3 +8,7 @@
#ifdef _MSC_VER
#pragma warning(disable: 4355)
#endif
+
+// quell spurious portable-function deprecation warnings
+#define _CRT_SECURE_NO_DEPRECATE 1
+#define _POSIX_ 1
\ No newline at end of file