From f31980afe729b394cd8ace5fcd29026d99a49a9b Mon Sep 17 00:00:00 2001
From: Vladimir Prus <ghost@cs.msu.su>
Date: Tue, 22 Mar 2005 08:06:02 +0000
Subject: [PATCH] Serialize execution of gcc.link.* actions when -j option is
 specifying. Executing link actions in parallel hardly speeds up anything.

[SVN r27764]
---
 v2/tools/gcc.jam | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/v2/tools/gcc.jam b/v2/tools/gcc.jam
index 3355b5d55..c0ec7641c 100644
--- a/v2/tools/gcc.jam
+++ b/v2/tools/gcc.jam
@@ -257,6 +257,11 @@ rule init-link-flags ( toolset linker condition )
 rule link ( targets * : sources * : properties * )
 {
     SPACE on $(targets) = " " ;    
+    # Serialize execution of the 'link' action, since
+    # running N links in parallel is just slower.
+    # For now, serialize only gcc links, it might be a good
+    # idea to serialize all links.
+    JAM_SEMAPHORE on $(targets) = <s>gcc-link-semaphore ;
 }
 
 actions link bind LIBRARIES
@@ -291,6 +296,7 @@ actions piecemeal archive
 rule link.dll ( targets * : sources * : properties * )
 {
     SPACE on $(targets) = " " ;    
+    JAM_SEMAPHORE on $(targets) = <s>gcc-link-semaphore ;
 }
 
 # Differ from 'link' above only by -shared.