From aef4bb33e578207f8f61d34e20181a19088e32ac Mon Sep 17 00:00:00 2001
From: "Tim J. Robbins" <tjr@FreeBSD.org>
Date: Thu, 1 May 2003 02:36:27 +0000
Subject: [PATCH] Flush streams before calling system() so that the output
 appears in the right place in the output stream when redirected to a file
 (when full buffering is enabled). Noticed by schweikh on freebsd-standards.

---
 usr.bin/m4/eval.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/usr.bin/m4/eval.c b/usr.bin/m4/eval.c
index 37ccc35c529..6d2d0fdefc5 100644
--- a/usr.bin/m4/eval.c
+++ b/usr.bin/m4/eval.c
@@ -241,8 +241,10 @@ expand_builtin(const char *argv[], int argc, int td)
 	/*
 	 * dosys - execute system command
 	 */
-		if (argc > 2)
+		if (argc > 2) {
+			fflush(NULL);
 			sysval = system(argv[2]);
+		}
 		break;
 
 	case SYSVTYPE: