UNAME=$(shell uname)
+UNAME_A=$(shell uname -a)
OS_AIX=$(shell expr "$(UNAME)" : '.*AIX.*')
OS_SUNOS=$(shell expr "$(UNAME)" : '.*SunOS.*')
OS_DARWIN=$(shell expr "$(UNAME)" : '.*Darwin.*')
OS_CYGWIN=$(shell expr "$(UNAME)" : '.*CYGWIN.*')
+OS_LINUX=$(shell expr "$(UNAME)" : '.*Linux.*')
+OS_LINUX64=$(shell expr "$(UNAME_A)" : '.*Linux.*x86_64.*')
all: