Allow compilation of BACnet/IP demos in Cygwin in Windows

bacnet-stack/demo/Makefile

@@ -61,10 +61,22 @@ SUBDIRS = readprop writeprop readfile writefile reinit server dcc \
 ifeq (${BACDL_DEFINE},-DBACDL_BIP=1)
 	SUBDIRS += whoisrouter iamrouter initrouter readbdt
 endif
-ifeq (${BACNET_PORT},linux)
+
+# EKH: only include MSTP stuff if building targets MSTP or ALL. This allows us to compile under Cygwin, which has no support for RS485 (yet)
+# I searched for a clean way of doing the 'or' operation and the best I could come up with was http://stackoverflow.com/questions/7656425/makefile-ifeq-logical-or
+addMSTP=
+ifdef BACDL_ALL
+	addMSTP = true 
+endif
+ifeq (${BACDL_DEFINE},-DBACDL_MSTP=1)
+	addMSTP = true 
+endif
+ifdef addMSTP			# if we want MSTP
+ifeq (${BACNET_PORT},linux)	# AND we are compiling under linux/cygwin
 SUBDIRS += mstpcap mstpcrc
 #SUBDIRS += router
 endif
+endif
 
 ifeq (${BACNET_PORT},win32)
 SUBDIRS += ptransfer mstpcap mstpcrc

bacnet-stack/ports/linux/net.h

@@ -75,19 +75,25 @@
 
 #define ENUMS
 #include <sys/socket.h>
+#ifndef __CYGWIN__
 #include <net/route.h>
+#endif
 #include <net/if.h>
+#ifndef __CYGWIN__
 #include <net/if_arp.h>
+#endif
 #include <features.h>   /* for the glibc version number */
 #if __GLIBC__ >= 2 && __GLIBC_MINOR >= 1
 #include <netpacket/packet.h>
 #include <net/ethernet.h>       /* the L2 protocols */
 #else
 #include <asm/types.h>
+#ifndef __CYGWIN__
 #include <linux/if_packet.h>
 #include <linux/if_arcnet.h>
 #include <linux/if_ether.h>
 #endif
+#endif
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <sys/un.h>

bacnet-stack/readme.txt

@@ -62,7 +62,7 @@ are created that run under Windows or Linux. They use the BACnet/IP datalink
 layer for communication by default, but could be compiled to use BACnet 
 Ethernet, ARCNET, or MS/TP.
 
-Linux/Unix
+Linux/Unix/Cygwin
 $ make clean all
 
 Windows