SERVER-18668 warn about pessimizing/redundant moves if compiler can do so

1 files changed, 7 insertions, 0 deletions

diff --git a/SConstruct b/SConstruct
index 171bdf27212..8ef78d3780c 100644
--- a/SConstruct
+++ b/SConstruct
@@ -1683,6 +1683,13 @@ def doConfigure(myenv):
         # Don't issue warnings about potentially evaluated expressions
         AddToCCFLAGSIfSupported(myenv, "-Wno-potentially-evaluated-expression")
 
+        # Warn about moves of prvalues, which can inhibit copy elision.
+        AddToCXXFLAGSIfSupported(myenv, "-Wpessimizing-move")
+
+        # Warn about redundant moves, such as moving a local variable in a return that is different
+        # than the return type.
+        AddToCXXFLAGSIfSupported(myenv, "-Wredundant-move")
+
     # Check if we need to disable null-conversion warnings
     if myenv.ToolchainIs('clang'):
         def CheckNullConversion(context):