From 9acb657eb18a35a920fa24615e5f80060e656e72 Mon Sep 17 00:00:00 2001
From: Paul Smith <psmith@gnu.org>
Date: Wed, 1 May 2013 07:59:24 -0400
Subject: [PATCH] Don't synchronize output for recursive make unless -Omake

---
 ChangeLog | 5 +++++
 job.c     | 6 ++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 6badda83..148ca6a9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-05-01  Paul Smith  <psmith@gnu.org>
+
+	* job.c (start_job_command): Don't redirect output for recursive
+	make jobs, unless we're in makefile synchronization mode.
+
 2013-04-29  Eli Zaretskii  <eliz@gnu.org>
 
 	* w32/include/dlfcn.h: New file.
diff --git a/job.c b/job.c
index 2a470b69..24888080 100644
--- a/job.c
+++ b/job.c
@@ -1707,8 +1707,10 @@ start_job_command (struct child *child)
 #endif
 
 #ifdef OUTPUT_SYNC
-          /* Divert child output into tempfile(s) if output_sync in use. */
-          if (output_sync)
+          /* Divert child output if output_sync in use.  Don't capture
+             recursive make output unless we are synchronizing "make" mode.  */
+          if (output_sync && (output_sync == OUTPUT_SYNC_MAKE
+                              || !(flags & COMMANDS_RECURSE)))
             {
               int outfd = fileno (stdout);
               int errfd = fileno (stderr);