Simplified host OS platform detection in Makefiles

cpu/avr/Makefile.avr

@@ -1,15 +1,5 @@
 # $Id: Makefile.avr,v 1.27 2010/12/22 21:13:09 dak664 Exp $
 	
-### Check if we are running under Windows
-
-ifndef WINDIR
-  ifdef OS
-    ifneq (,$(findstring Windows,$(OS)))
-      WINDIR := Windows
-    endif
-  endif
-endif
-
 .SUFFIXES:
 
 ### Optimization setting. $make OPTI=0 for easier debugging of changed source file(s)

cpu/mc1322x/Makefile.mc1322x

@@ -72,8 +72,7 @@ CUSTOM_RULE_C_TO_O=yes
 CFLAGS += -I$(OBJECTDIR) -I$(CONTIKI_CPU)/board -DBOARD=$(TARGET)
 
 $(OBJECTDIR)/board.h: $(OBJECTDIR) 
-ifneq (,$(findstring Windows,$(OS)))
-	${info Cygwin detected.}
+ifeq ($(HOST_OS),Windows)
 	ln -f $(CONTIKI_CPU)/board/board.h $(OBJECTDIR)/board.h
 else
 	ln -sf ../$(CONTIKI_CPU)/board/board.h $(OBJECTDIR)/board.h

cpu/stm32w108/Makefile.stm32w108

@@ -166,10 +166,8 @@ endif
 FLASHER = $(CONTIKI)/tools/stm32w/stm32w_flasher/stm32w_flasher
 
 # Check if we are running under Windows
-ifdef OS
-  ifneq (,$(findstring Windows,$(OS)))
-  	FLASHER = $(CONTIKI)/tools/stm32w/stm32w_flasher/stm32w_flasher.exe   
-  endif   
+ifeq ($(HOST_OS),Windows)
+  FLASHER = $(CONTIKI)/tools/stm32w/stm32w_flasher/stm32w_flasher.exe
 endif