mh-sysv4

早期freebsd实现

# Define USG as -DUSG if you are using a System V operating system.
# Define USGr4 also if you are on an SVR4 system.
USG = -DUSG -DUSGr4
RANLIB = true
INSTALL_PROG = /usr/ucb/install -c

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