test for BSD sendfile

GNUmakefile

@@ -71,7 +71,7 @@ $(DNS_OBJS): dns.h stralloc.h taia.h tai.h uint64.h iopause.h
 $(CASE_OBJS): case.h
 $(ARRAY_OBJS): uint64.h array.h
 $(MULT_OBJS): uint64.h uint32.h uint16.h safemult.h
-$(IO_OBJS): uint64.h array.h io.h io_internal.h taia.h tai.h haveepoll.h havekqueue.h havesigio.h
+$(IO_OBJS): uint64.h array.h io.h io_internal.h taia.h tai.h haveepoll.h havekqueue.h havesigio.h havebsdsf.h
 
 
 iob_addbuf.o iob_addfile.o iob_new.o iob_reset.o iob_send.o: iob_internal.h iob.h
@@ -121,8 +121,9 @@ t: t.o libowfat.a
 
 .PHONY: all clean tar install rename
 clean:
-	rm -f *.o *.a *.da *.bbg *.bb core t haveip6.h haven2i.h havesl.h haveinline.h \
-iopause.h select.h havekqueue.h haveepoll.h libepoll havesigio.h Makefile dep
+	rm -f *.o *.a *.da *.bbg *.bb core t haveip6.h haven2i.h \
+havesl.h haveinline.h iopause.h select.h havekqueue.h haveepoll.h \
+libepoll havesigio.h havebsdsf.h Makefile dep
 
 INCLUDES=buffer.h byte.h fmt.h ip4.h ip6.h mmap.h scan.h socket.h str.h stralloc.h \
 uint16.h uint32.h uint64.h open.h textcode.h tai.h taia.h dns.h iopause.h case.h \
@@ -174,6 +175,11 @@ havekqueue.h: trykqueue.c
 	if $(DIET) $(CC) $(CFLAGS) -c trykqueue.c >/dev/null 2>&1; then echo "#define HAVE_KQUEUE"; fi > $@
 	-rm -f trykqueue.o
 
+havebsdsf.h: trybsdsf.c
+	-rm -f $@
+	if $(DIET) $(CC) $(CFLAGS) -c trybsdsf.c >/dev/null 2>&1; then echo "#define HAVE_BSDSENDFILE"; fi > $@
+	-rm -f trybsdsf.o
+
 haveepoll.h: tryepoll.c
 	-rm -f $@
 	if $(DIET) $(CC) $(CFLAGS) -o tryepoll tryepoll.c >/dev/null 2>&1; then echo "#define HAVE_EPOLL 1"; else \

trybsdsf.c

@@ -0,0 +1,16 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+
+int main() {
+  struct sf_hdtr hdr;
+  struct iovec v[17+23];
+  int r,fd=1;
+  off_t sbytes;
+  hdr.headers=v; hdr.hdr_cnt=17;
+  hdr.trailers=v+headers; hdr.trl_cnt=23;
+  r=sendfile(0,1,37,42,&hdr,&sbytes,0);
+}