From 7387505ddf0bab58c07ccb0c573ff7fdf5116f49 Mon Sep 17 00:00:00 2001
From: Andrew Morrow <acm@mongodb.com>
Date: Sun, 21 Feb 2021 12:47:05 -0500
Subject: SERVER-49323 Add experimental support for -fno-semantic-interposition

---
 SConstruct | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'SConstruct')

diff --git a/SConstruct b/SConstruct
index 2aea0c8e965..287a34f0d49 100644
--- a/SConstruct
+++ b/SConstruct
@@ -273,6 +273,7 @@ add_option('opt',
 )
 
 experimental_optimizations = [
+    'fnsi',
     'sandybridge',
     'treevec',
 ]
@@ -3636,6 +3637,9 @@ def doConfigure(myenv):
                     myenv,
                     f"-Wl,--{compress_flag}=none")
 
+        if "fnsi" in selected_experimental_optimizations:
+            AddToCCFLAGSIfSupported(myenv, "-fno-semantic-interposition")
+
     # Avoid deduping symbols on OS X debug builds, as it takes a long time.
     if not optBuild and myenv.ToolchainIs('clang') and env.TargetOSIs('darwin'):
         AddToLINKFLAGSIfSupported(myenv, "-Wl,-no_deduplicate")
@@ -4351,7 +4355,10 @@ def doConfigure(myenv):
         elif usdt_provider:
             conf.env.SetConfigHeaderDefine("MONGO_CONFIG_USDT_ENABLED")
             conf.env.SetConfigHeaderDefine("MONGO_CONFIG_USDT_PROVIDER", usdt_provider)
-    return conf.Finish()
+    myenv = conf.Finish()
+
+    return myenv
+
 
 
 env = doConfigure( env )
-- 
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