---- src/bvi.c~ 2014-10-07 13:09:45.000000000 -0700
-+++ src/bvi.c 2017-01-03 23:37:09.469794620 -0800
-@@ -729,7 +729,6 @@
- char *arg;
- {
- off_t val;
-- extern int errno;
- char *poi;
-
- errno = 0;
---- src/comm.c~ 2014-01-29 06:54:53.000000000 -0800
-+++ src/comm.c 2017-01-03 23:37:18.305820838 -0800
+--- bvi-1.4.0/comm.c 2014-01-29 06:54:53.000000000 -0800
++++ src/comm.c 2017-02-19 00:34:01.622869129 -0800