From 49e0f485dac263e3b26cff01ed1759e46880e497 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Sun, 23 Dec 2018 17:26:09 +0100
Subject: [PATCH] Add -mavx2 for TARGET=HASWELL if compiler supports and
 requires it

---
 cmake/system.cmake | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cmake/system.cmake b/cmake/system.cmake
index d803bb9eb..ba2c4f351 100644
--- a/cmake/system.cmake
+++ b/cmake/system.cmake
@@ -45,6 +45,12 @@ if (DEFINED TARGET)
 if (${TARGET} STREQUAL "SKYLAKEX" AND NOT NO_AVX512)
   set (KERNEL_DEFINITIONS "${KERNEL_DEFINITIONS} -march=skylake-avx512")
 endif()
+if (${TARGET} STREQUAL "HASWELL" AND NOT NO_AVX2)
+   execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
+   if (${GCC_VERSION} VERSION_GREATER 4.7 OR ${GCC_VERSION} VERSION_EQUAL 4.7)
+     set (KERNEL_DEFINITIONS "${KERNEL_DEFINITIONS} -mavx2")
+   endif()
+endif()
 endif()
 
 if (DEFINED TARGET)