$NetBSD: patch-Makefile,v 1.1 2015/08/19 19:36:56 yhardy Exp $

Work around "uname -o" which is not available on NetBSD.

--- Makefile.orig	2013-09-07 23:57:24.000000000 +0000
+++ Makefile
@@ -1,6 +1,10 @@
 # BUILD SETTINGS ###########################################
 
-ifneq ($(filter Msys Cygwin, $(shell uname -o)), )
+UNAME_SYSTEM := $(shell uname -s)
+UNAME_SYSTEM := $(patsubst CYGWIN%,Cygwin,${UNAME_SYSTEM})
+UNAME_SYSTEM := $(patsubst MSYS%,Msys,${UNAME_SYSTEM})
+
+ifneq ($(filter Msys Cygwin, ${UNAME_SYSTEM}), )
     PLATFORM := WIN32
 else
     PLATFORM := UNIX
