From 93cdeb4aec73678ed85788124ff41ca7586a215a Mon Sep 17 00:00:00 2001
From: Ed Maste <emaste@FreeBSD.org>
Date: Fri, 23 Sep 2016 13:21:29 +0000
Subject: [PATCH] Force LLVM_LIBUNWIND off if we don't have a C++11 compiler

Tested by:	bde
Differential Revision:	https://reviews.freebsd.org/D7746
---
 share/mk/src.opts.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/share/mk/src.opts.mk b/share/mk/src.opts.mk
index 59f826cc9d1..bec699fe12a 100644
--- a/share/mk/src.opts.mk
+++ b/share/mk/src.opts.mk
@@ -289,6 +289,10 @@ MK_${var}:=	no
 # Force some options off if their dependencies are off.
 # Order is somewhat important.
 #
+.if !${COMPILER_FEATURES:Mc++11}
+MK_LLVM_LIBUNWIND:=	no
+.endif
+
 .if ${MK_LIBPTHREAD} == "no"
 MK_LIBTHR:=	no
 .endif