From edf4ab0f81741a3788e17d2a1009ea935ef639c2 Mon Sep 17 00:00:00 2001
From: Andrew Morrow <andrew.morrow@10gen.com>
Date: Mon, 14 Oct 2019 17:52:03 +0000
Subject: [PATCH] SERVER-43979 Prefer lld when available

---
 SConstruct | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/SConstruct b/SConstruct
index 683a07a836b4..398f2caf6947 100644
--- a/SConstruct
+++ b/SConstruct
@@ -2821,10 +2821,13 @@ def doConfigure(myenv):
         # because it is much faster. Don't use it if the user has already configured another linker
         # selection manually.
         if not any(flag.startswith('-fuse-ld=') for flag in env['LINKFLAGS']):
-            if AddToLINKFLAGSIfSupported(myenv, '-fuse-ld=gold'):
+            if AddToLINKFLAGSIfSupported(myenv, '-fuse-ld=lld') or AddToLINKFLAGSIfSupported(myenv, '-fuse-ld=gold'):
                 if link_model.startswith("dynamic"):
                     AddToLINKFLAGSIfSupported(myenv, '-Wl,--gdb-index')
 
+            # Our build is already parallel.
+            AddToLINKFLAGSIfSupported(myenv, '-Wl,--no-threads')
+
         # Explicitly enable GNU build id's if the linker supports it.
         AddToLINKFLAGSIfSupported(myenv, '-Wl,--build-id')