Index: Mk/bsd.port.mk
===================================================================
--- Mk/bsd.port.mk
+++ Mk/bsd.port.mk
@@ -1737,6 +1737,20 @@
 .include "${PORTSDIR}/Mk/bsd.gcc.mk"
 .endif
 
+_TEST_LD=/usr/bin/ld
+.if defined(LLD_UNSAFE) && ${_TEST_LD:tA} == "/usr/bin/ld.lld"
+LDFLAGS+=	-fuse-ld=bfd
+.  if !defined(USE_BINUTILS)
+.    if exists(/usr/bin/ld.bfd)
+LD=	/usr/bin/ld.bfd
+CONFIGURE_ENV+=	LD=${LD}
+MAKE_ENV+=	LD=${LD}
+.    else
+USE_BINUTILS=	yes
+.    endif
+.  endif
+.endif
+
 .if defined(USE_BINUTILS) && !defined(DISABLE_BINUTILS)
 BUILD_DEPENDS+=	${LOCALBASE}/bin/as:devel/binutils
 BINUTILS?=	ADDR2LINE AR AS CPPFILT GPROF LD NM OBJCOPY OBJDUMP RANLIB \
Index: devel/libunwind/Makefile
===================================================================
--- devel/libunwind/Makefile
+++ devel/libunwind/Makefile
@@ -25,6 +25,7 @@
 INSTALL_TARGET=	install-strip
 USE_LDCONFIG=	yes
 USES=		libtool pathfix pkgconfig
+LLD_UNSAFE=	yes
 
 PLIST_SUB=	ARCH=${ARCH:S|i386|x86|:S|amd64|x86_64|}