ar flag comparison

Flag	base	ELF Tool Chain	binutils	llvm-ar
a	add after	add after	add after
b	add before	add before	add before
c	suppress info	suppress info	create
C
d	delete	delete	delete
D
f	truncate names	truncate names	truncate names
i	alias for b	alias for b	alias for b
j
l	ignored	ignored	ignored
m	move	move	move
p	print	print	print
q	append	append	append
r	replace	replace	replace
s	symbol table	symbol table	symbol table
t	show archive list	show archive list	show archive list
T	truncate names	thin archive	thin archive
x	extract	extract	extract