makefile.alg_aes

This a good VPN source

MOD_AES := ipsec_aes.o

ALG_MODULES += $(MOD_AES)
ALG_SUBDIRS += libaes

obj-$(CONFIG_IPSEC_ALG_AES) += $(MOD_AES)
static_init-func-$(CONFIG_IPSEC_ALG_AES)+= ipsec_aes_init
alg_obj-$(CONFIG_IPSEC_ALG_AES) += ipsec_alg_aes.o

AES_OBJS := ipsec_alg_aes.o libaes/libaes.a 

$(MOD_AES): libaes $(AES_OBJS) 
	$(LD) $(EXTRA_LDFLAGS) -r $(AES_OBJS) -o $@

libaes: $(LIBCRYPTO)/libaes
	test -d $@ || mkdir $@ ;exit 0
	test -d $@/asm || mkdir $@/asm;exit 0
	cd $@ && ln -sf $?/Makefile $?/*.[chS] .
	cd $@/asm && ln -sf $?/asm/*.S .

libaes/libaes.a: libaes
	( cd libaes && \
		$(MAKE) CC='$(CC)' 'ARCH_ASM=$(ARCH_ASM)' CFLAGS='$(CFLAGS) $(EXTRA_CFLAGS)' libaes.a ;)