--- a/extensions/Makefile
+++ b/extensions/Makefile
@@ -11,13 +11,13 @@ EXT_LIBSI+=$(foreach T,$(EXT_FUNC), -leb
 EXT_LIBSI+=$(foreach T,$(EXT_TABLES), -lebtable_$(T))
 
 extensions/ebt_%.so: extensions/ebt_%.o
-	$(CC) $(LDFLAGS) -shared -o $@ -lc $< -nostartfiles
+	$(CC) $(LDFLAGS) -shared -o $@ -lc $<
 
 extensions/libebt_%.so: extensions/ebt_%.so
 	mv $< $@
 
 extensions/ebtable_%.so: extensions/ebtable_%.o
-	$(CC) $(LDFLAGS) -shared -o $@ -lc $< -nostartfiles
+	$(CC) $(LDFLAGS) -shared -o $@ -lc $<
 
 extensions/libebtable_%.so: extensions/ebtable_%.so
 	mv $< $@
--- a/extensions/ebt_802_3.c
+++ b/extensions/ebt_802_3.c
@@ -141,7 +141,7 @@ static struct ebt_u_match _802_3_match =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&_802_3_match);
 }
--- a/extensions/ebt_among.c
+++ b/extensions/ebt_among.c
@@ -491,7 +491,7 @@ static struct ebt_u_match among_match =
 	.extra_ops 	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&among_match);
 }
--- a/extensions/ebt_arp.c
+++ b/extensions/ebt_arp.c
@@ -362,7 +362,7 @@ static struct ebt_u_match arp_match =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&arp_match);
 }
--- a/extensions/ebt_arpreply.c
+++ b/extensions/ebt_arpreply.c
@@ -133,7 +133,7 @@ static struct ebt_u_target arpreply_targ
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_target(&arpreply_target);
 }
--- a/extensions/ebt_ip.c
+++ b/extensions/ebt_ip.c
@@ -472,7 +472,7 @@ static struct ebt_u_match ip_match =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&ip_match);
 }
--- a/extensions/ebt_ip6.c
+++ b/extensions/ebt_ip6.c
@@ -413,7 +413,7 @@ static struct ebt_u_match ip6_match =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&ip6_match);
 }
--- a/extensions/ebt_limit.c
+++ b/extensions/ebt_limit.c
@@ -212,7 +212,7 @@ static struct ebt_u_match limit_match =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&limit_match);
 }
--- a/extensions/ebt_log.c
+++ b/extensions/ebt_log.c
@@ -217,7 +217,7 @@ static struct ebt_u_watcher log_watcher
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_watcher(&log_watcher);
 }
--- a/extensions/ebt_mark.c
+++ b/extensions/ebt_mark.c
@@ -172,7 +172,7 @@ static struct ebt_u_target mark_target =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_target(&mark_target);
 }
--- a/extensions/ebt_mark_m.c
+++ b/extensions/ebt_mark_m.c
@@ -121,7 +121,7 @@ static struct ebt_u_match mark_match =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&mark_match);
 }
--- a/extensions/ebt_nat.c
+++ b/extensions/ebt_nat.c
@@ -231,7 +231,7 @@ static struct ebt_u_target dnat_target =
 	.extra_ops	= opts_d,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_target(&snat_target);
 	ebt_register_target(&dnat_target);
--- a/extensions/ebt_nflog.c
+++ b/extensions/ebt_nflog.c
@@ -166,7 +166,7 @@ static struct ebt_u_watcher nflog_watche
 	.extra_ops = nflog_opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_watcher(&nflog_watcher);
 }
--- a/extensions/ebt_pkttype.c
+++ b/extensions/ebt_pkttype.c
@@ -125,7 +125,7 @@ static struct ebt_u_match pkttype_match
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&pkttype_match);
 }
--- a/extensions/ebt_redirect.c
+++ b/extensions/ebt_redirect.c
@@ -108,7 +108,7 @@ static struct ebt_u_target redirect_targ
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_target(&redirect_target);
 }
--- a/extensions/ebt_standard.c
+++ b/extensions/ebt_standard.c
@@ -84,7 +84,7 @@ static struct ebt_u_target standard =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_target(&standard);
 }
--- a/extensions/ebt_stp.c
+++ b/extensions/ebt_stp.c
@@ -337,7 +337,7 @@ static struct ebt_u_match stp_match =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&stp_match);
 }
--- a/extensions/ebt_ulog.c
+++ b/extensions/ebt_ulog.c
@@ -180,7 +180,7 @@ static struct ebt_u_watcher ulog_watcher
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_watcher(&ulog_watcher);
 }
--- a/extensions/ebt_vlan.c
+++ b/extensions/ebt_vlan.c
@@ -181,7 +181,7 @@ static struct ebt_u_match vlan_match = {
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&vlan_match);
 }
--- a/extensions/ebtable_broute.c
+++ b/extensions/ebtable_broute.c
@@ -23,7 +23,7 @@ ebt_u_table table =
 	.help		= print_help,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_table(&table);
 }
--- a/extensions/ebtable_filter.c
+++ b/extensions/ebtable_filter.c
@@ -29,7 +29,7 @@ static struct ebt_u_table table =
 	.help		= print_help,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_table(&table);
 }
--- a/extensions/ebtable_nat.c
+++ b/extensions/ebtable_nat.c
@@ -30,7 +30,7 @@ ebt_u_table table =
 	.help		= print_help,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_table(&table);
 }
--- a/extensions/ebt_string.c
+++ b/extensions/ebt_string.c
@@ -310,7 +310,7 @@ static struct ebt_u_match string_match =
 	.extra_ops	= opts,
 };
 
-void _init(void)
+__attribute__((constructor)) static void extension_init(void)
 {
 	ebt_register_match(&string_match);
 }