为什么编译2.6内核时，还是会编译很多.o模块而不全是.ko模块呢？

LD [M] net/bridge/netfilter/ebt_stp.ko
CC net/bridge/netfilter/ebt_vlan.mod.o
LD [M] net/bridge/netfilter/ebt_vlan.ko
CC net/bridge/netfilter/ebtable_broute.mod.o
LD [M] net/bridge/netfilter/ebtable_broute.ko
CC net/bridge/netfilter/ebtable_filter.mod.o
LD [M] net/bridge/netfilter/ebtable_filter.ko
CC net/bridge/netfilter/ebtable_nat.mod.o
LD [M] net/bridge/netfilter/ebtable_nat.ko
CC net/bridge/netfilter/ebtables.mod.o
LD [M] net/bridge/netfilter/ebtables.ko
CC net/ipv4/ah4.mod.o
LD [M] net/ipv4/ah4.ko
CC net/ipv4/esp4.mod.o
LD [M] net/ipv4/esp4.ko
CC net/ipv4/ip_gre.mod.o
LD [M] net/ipv4/ip_gre.ko
CC net/ipv4/ipcomp.mod.o
LD [M] net/ipv4/ipcomp.ko
CC net/ipv4/ipip.mod.o
LD [M] net/ipv4/ipip.ko
CC net/ipv4/ipvs/ip_vs.mod.o
LD [M] net/ipv4/ipvs/ip_vs.ko
CC net/ipv4/ipvs/ip_vs_dh.mod.o
LD [M] net/ipv4/ipvs/ip_vs_dh.ko
CC net/ipv4/ipvs/ip_vs_ftp.mod.o
LD [M] net/ipv4/ipvs/ip_vs_ftp.ko
CC net/ipv4/ipvs/ip_vs_lblc.mod.o
LD [M] net/ipv4/ipvs/ip_vs_lblc.ko
CC net/ipv4/ipvs/ip_vs_lblcr.mod.o
LD [M] net/ipv4/ipvs/ip_vs_lblcr.ko
CC net/ipv4/ipvs/ip_vs_lc.mod.o
LD [M] net/ipv4/ipvs/ip_vs_lc.ko
CC net/ipv4/ipvs/ip_vs_nq.mod.o
LD [M] net/ipv4/ipvs/ip_vs_nq.ko
CC net/ipv4/ipvs/ip_vs_rr.mod.o

o是object file，是编译过程必须要经历的一步
编译出.o，之后才能连接出.ko