From a50bc7d8248dbdf4cd89bf6bfb6efbeb974f79a5 Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@intel.com>
Date: Sat, 29 Oct 2016 15:52:14 +0300
Subject: [PATCH] cmake: fix libpng for AARCH64

---
 3rdparty/libpng/CMakeLists.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/3rdparty/libpng/CMakeLists.txt b/3rdparty/libpng/CMakeLists.txt
index 99e4663033..919d84e58b 100644
--- a/3rdparty/libpng/CMakeLists.txt
+++ b/3rdparty/libpng/CMakeLists.txt
@@ -31,6 +31,8 @@ file(GLOB lib_hdrs *.h)
 if(ENABLE_NEON)
   list(APPEND lib_srcs arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c)
   add_definitions(-DPNG_ARM_NEON_OPT=2)
+elseif(AARCH64)
+  add_definitions(-DPNG_ARM_NEON_OPT=0) # NEON assembler is not supported
 endif()
 
 if(ENABLE_SSE