From a402c1e54f92f42f2e0690ca182e8320c520dd5d Mon Sep 17 00:00:00 2001
From: Ed Maste <emaste@FreeBSD.org>
Date: Wed, 9 Nov 2016 15:04:29 +0000
Subject: [PATCH] c++filt: flush output after newline

Some tools spawn c++filt and pass it a single line at a time for
demangling. This is akin to r276689 for addr2line.

Sponsored by:	The FreeBSD Foundation
---
 contrib/elftoolchain/cxxfilt/cxxfilt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/contrib/elftoolchain/cxxfilt/cxxfilt.c b/contrib/elftoolchain/cxxfilt/cxxfilt.c
index c6d737a05267..f471a5a7f552 100644
--- a/contrib/elftoolchain/cxxfilt/cxxfilt.c
+++ b/contrib/elftoolchain/cxxfilt/cxxfilt.c
@@ -188,6 +188,8 @@ main(int argc, char **argv)
 				if (c == EOF)
 					break;
 				putchar(c);
+				if (c == '\n')
+					fflush(stdout);
 			} else {
 				if ((size_t) p >= sizeof(buf) - 1)
 					warnx("buffer overflowed");