mh-sysv4

早期freebsd实现

# Define SYSV as -DSYSV if you are using a System V operating system.
SYSV = -DSYSV -DSVR4
RANLIB = true
INSTALL = /usr/ucb/install -c

# The l flag generates a warning from the SVR4 archiver, remove it.
AR_FLAGS = cq