From 29fa7700db8e7a23a5a9a074a469bf3bcc07df81 Mon Sep 17 00:00:00 2001
From: Zhiru Zhu <zhiru.zhu@zilliz.com>
Date: Wed, 27 Nov 2019 15:03:05 +0800
Subject: [PATCH] add avx flags when building faiss

---
 core/src/index/cmake/ThirdPartyPackagesCore.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/index/cmake/ThirdPartyPackagesCore.cmake b/core/src/index/cmake/ThirdPartyPackagesCore.cmake
index 1a22a9d2be..fb698cdf13 100644
--- a/core/src/index/cmake/ThirdPartyPackagesCore.cmake
+++ b/core/src/index/cmake/ThirdPartyPackagesCore.cmake
@@ -708,7 +708,7 @@ macro(build_faiss)
     set(FAISS_CONFIGURE_ARGS
             "--prefix=${FAISS_PREFIX}"
             "CFLAGS=${EP_C_FLAGS}"
-            "CXXFLAGS=${EP_CXX_FLAGS}"
+            "CXXFLAGS=${EP_CXX_FLAGS} -mavx2 -mf16c"
             --without-python)
 
     if (FAISS_WITH_MKL)