From 27f417a05dcad12d18489453c12092add2732486 Mon Sep 17 00:00:00 2001
From: Elliott Slaughter <slaughter@cs.stanford.edu>
Date: Tue, 14 Apr 2020 16:51:36 -0700
Subject: [PATCH] Tweak flag for backwards compatibility.

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 727b4d101..af6415581 100644
--- a/Makefile
+++ b/Makefile
@@ -88,7 +88,7 @@ FLAGS += -DLLVM_VERSION=$(LLVM_VERSION)
 
 LLVM_NEEDS_CXX14="100"
 ifeq (,$(findstring $(LLVM_VERSION),$(LLVM_NEEDS_CXX14)))
-CPPFLAGS += -std=c++14
+CPPFLAGS += -std=c++1y # GCC 5 does not support -std=c++14 flag
 else
 CPPFLAGS += -std=c++11
 endif