net/trickle with clang

Index: patches/patch-getopt_c
===================================================================
RCS file: patches/patch-getopt_c
diff -N patches/patch-getopt_c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ patches/patch-getopt_c 25 May 2017 12:52:06 -0000
@@ -0,0 +1,15 @@
+$OpenBSD$
+
+Index: getopt.c
+--- getopt.c.orig
++++ getopt.c
+@@ -41,8 +41,8 @@ static char *rcsid = "$OpenBSD: getopt.c,v 1.2 1996/08
+
+ int opterr = 1, /* if error message should be printed */
+ optind = 1, /* index into parent argv vector */
+- optopt, /* character checked for validity */
+ optreset; /* reset getopt */
++extern int optopt; /* character checked for validity */
+ char *optarg; /* argument associated with option */
+
+ #define BADCH (int)'?'
Hi ports@

This is a simple diff to allow net/trickle to be compiled by clang.

Regards,
mestre