OS=$(shell uname)
ifeq ($(OS), Darwin)
FILE=Makefile.mac
endif
ifneq (,$(findstring MINGW,$(OS)))
FILE=Makefile.mingw
endif
ifeq ($(OS), Linux)
FILE=Makefile.linux
endif
ifeq ($(OS), FreeBSD)
FILE=Makefile.freebsd
endif
ifeq ($(FILE), )
all:
$(error Your platform ${OS} is not supported at this time.)
endif
include $(FILE)