1 files changed, 83 insertions, 0 deletions
diff --git a/devel/libevent/files/patch-gcc7 b/devel/libevent/files/patch-gcc7
new file mode 100644
index 000000000000..d072a5a559b8
--- /dev/null
+++ b/devel/libevent/files/patch-gcc7
@@ -0,0 +1,83 @@
+Fix -Werror=implicit-fallthrough (fixes gcc-7)
+
+https://github.com/libevent/libevent/commit/94e7dcebc320
+https://github.com/libevent/libevent/commit/ffbce578c40a
+
+--- bufferevent_filter.c.orig	2017-01-25 23:37:15 UTC
++++ bufferevent_filter.c
+@@ -612,9 +612,12 @@ be_filter_ctrl(struct bufferevent *bev, 
+ 			bevf->underlying->be_ops->ctrl) {
+ 		    return (bevf->underlying->be_ops->ctrl)(bevf->underlying, op, data);
+ 		}
++		EVUTIL_FALLTHROUGH;
+ 
+ 	case BEV_CTRL_GET_FD:
++		EVUTIL_FALLTHROUGH;
+ 	case BEV_CTRL_CANCEL_ALL:
++		EVUTIL_FALLTHROUGH;
+ 	default:
+ 		return -1;
+ 	}
+--- evdns.c.orig	2017-01-25 23:37:15 UTC
++++ evdns.c
+@@ -2265,10 +2265,11 @@ evdns_request_transmit(struct request *r
+ 		nameserver_write_waiting(req->ns, 1);
+ 		return 1;
+ 	case 2:
+-		/* failed to transmit the request entirely. */
++		/* failed to transmit the request entirely. we can fallthrough since
++		 * we'll set a timeout, which will time out, and make us retransmit the
++		 * request anyway. */
+ 		retcode = 1;
+-		/* fall through: we'll set a timeout, which will time out,
+-		 * and make us retransmit the request anyway. */
++		EVUTIL_FALLTHROUGH;
+ 	default:
+ 		/* all ok */
+ 		log(EVDNS_LOG_DEBUG,
+--- event.c.orig	2017-01-25 23:37:15 UTC
++++ event.c
+@@ -2960,6 +2960,7 @@ event_callback_activate_nolock_(struct e
+ 	switch (evcb->evcb_flags & (EVLIST_ACTIVE|EVLIST_ACTIVE_LATER)) {
+ 	default:
+ 		EVUTIL_ASSERT(0);
++		EVUTIL_FALLTHROUGH;
+ 	case EVLIST_ACTIVE_LATER:
+ 		event_queue_remove_active_later(base, evcb);
+ 		r = 0;
+--- util-internal.h.orig	2017-01-25 23:37:15 UTC
++++ util-internal.h
+@@ -50,6 +50,20 @@
+ extern "C" {
+ #endif
+ 
++/* __has_attribute() wrapper */
++#ifdef __has_attribute
++#define EVUTIL_HAS_ATTRIBUTE __has_attribute
++#endif
++/** clang 3 __has_attribute misbehaves in some versions */
++#if defined(__clang__) && \
++	__clang__ == 1 && __clang_major__ == 3 && \
++	(__clang_minor__ >= 2 && __clang_minor__ <= 5)
++#undef EVUTIL_HAS_ATTRIBUTE
++#endif
++#ifndef EVUTIL_HAS_ATTRIBUTE
++#define EVUTIL_HAS_ATTRIBUTE(x) 0
++#endif
++
+ /* If we need magic to say "inline", get it for free internally. */
+ #ifdef EVENT__inline
+ #define inline EVENT__inline
+@@ -308,6 +322,12 @@ ev_int32_t evutil_weakrand_range_(struct
+ #define EVUTIL_UNLIKELY(p) (p)
+ #endif
+ 
++#if EVUTIL_HAS_ATTRIBUTE(fallthrough)
++#define EVUTIL_FALLTHROUGH __attribute__((fallthrough))
++#else
++#define EVUTIL_FALLTHROUGH /* fallthrough */
++#endif
++
+ /* Replacement for assert() that calls event_errx on failure. */
+ #ifdef NDEBUG
+ #define EVUTIL_ASSERT(cond) EVUTIL_NIL_CONDITION_(cond)