From 7a78ec46c8e88dd8653ad6db3999be1e59ddd59c Mon Sep 17 00:00:00 2001
From: Robert MacGregor <ragoradev@gmail.com>
Date: Tue, 12 Oct 2021 17:20:23 -0400
Subject: [PATCH] * [lpng] BugFix: Correct some compiler warnings associated
 with lpng and SSE optimizations. This also enables SSE when available for
 lpng.

---
 Tools/CMake/libraries/lpng.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Tools/CMake/libraries/lpng.cmake b/Tools/CMake/libraries/lpng.cmake
index 93a32a406..833577e82 100644
--- a/Tools/CMake/libraries/lpng.cmake
+++ b/Tools/CMake/libraries/lpng.cmake
@@ -29,6 +29,11 @@ project(lpng)
 set(PNG_ARM_NEON off CACHE STRING "")
 add_definitions(-DPNG_ARM_NEON_OPT=0)
 
+# Enables SSE for libpng - also takes care of compiler warnings.
+# If we don't want SSE, we should set it to off/0.
+set(PNG_INTEL_SSE on CACHE STRING "")
+add_definitions(-DPNG_INTEL_SSE_OPT=1)
+
 addInclude(${libDir}/zlib)
 
 finishLibrary("${libDir}/${PROJECT_NAME}")